Gossen Metrawatt SSP 500 Series, SSP 1000 Series, SSP 2000 Series, SSP 3000 Operating Instructions

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Page 1

Operating Instructions

3-349-262-03

5/1.10

Series 64 N

Series 62 N

SSP KONSTANTER 62 N and 64 N

Series SSP 500, SSP 1000, SSP 2000 and SSP 3000 Programmable Power Supplies

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Contents Page

I Initial Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

II Warnings and Safety Precautions . . . . . . . . . . . . . . . . . .4

1 Technical Description . . . . . . . . . . . . . . . . . . . . . . . . . . .5

1.1 Features and Range of Applications . . . . . . . . . . . . . . . . . .5

1.2 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5

1.3 Options and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . .5

1.4 Functional Principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

1.5 Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

1.5.1 General Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

1.5.2 Mechanical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

1.5.3 Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

2 Initial Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.1 Preparing for Operation . . . . . . . . . . . . . . . . . . . . . . . . . .14

2.1.1 Installing the Optional IEEE 488

– RS 232C Interface Module . . . . . . . . . . . . . . . . . . . . .14

2.1.2 Installation to 19'' Device Racks . . . . . . . . . . . . . . . . . . .14

2.1.3 Connection to the Mains . . . . . . . . . . . . . . . . . . . . . . . .14

2.1.4 Connecting Power Consumers . . . . . . . . . . . . . . . . . . . .14

2.1.5 Connection to Computer Interfaces . . . . . . . . . . . . . . . . .14

2.2 Switching the Instrument On . . . . . . . . . . . . . . . . . . . . . . .15

3 Controls, Display Elements and Terminals . . . . . . . . . .16

4 Manual Operation and Device Functions . . . . . . . . . . . .21

4.1 Menu Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Setting Output Voltage Uset and Output Current Iset . . . . . . . . . . . . . . 21

4.2

4.2.1 Direct Selection (rotary knobs and arrow keys) . . . . . . . .21

4.2.2 Pre-selected Setting (ENTER, arrow keys) . . . . . . . . . . . .22

Switching the Power Output On and Off . . . . . . . . . . . . . . . . . . .23

4.3

4.4

Limiting the Allowable Working Range: Ulim, Ilim . . . . . . . . . . . . .23

4.5 Description of OVP and OCP Protection Functions . . . . . . .24

4.6 Display of Momentary Output Values Uout, Iout and Pout . .24

4.7 Operating Menu via the FUNCTION Key . . . . . . . . . . . . . . .25

4.7.1 SET – “Setup” Function Group . . . . . . . . . . . . . . . . . . . .26

4.7.2 AnIF – “Analog Interface” Function Group . . . . . . . . . . . .29

4.7.3 SEq – The “Sequence” Function Group . . . . . . . . . . . . . .30

4.7.4 buS – The “Interface” Function Group . . . . . . . . . . . . . . .38

4.8 Settings with the <SELECT> Key . . . . . . . . . . . . . . . . . . .40

4.8.1 In the Basic Function . . . . . . . . . . . . . . . . . . . . . . . . . . .40

4.8.2

4.8.3

4.9 Setting Resolution with the <RESOL> Key . . . . . . . . . . . . .41

4.10 Storing Data with the <SAVE> Key . . . . . . . . . . . . . . . . . .41

4.10.1 Saving Basic Device Settings . . . . . . . . . . . . . . . . . . . . .41

4.10.2 Saving Data to a Memory Location . . . . . . . . . . . . . . . . .41

4.10.3

4.10.4 Inserting a Memory Location . . . . . . . . . . . . . . . . . . . . .43

4.10.5 Deleting a Memory Location . . . . . . . . . . . . . . . . . . . . .44

4.10.6 Deleting the Contents of a Memory Location . . . . . . . . .45

4.11 Memory Recall with the <RCL> Key . . . . . . . . . . . . . . . . .45

4.11.1 Recall from SETUP Memory . . . . . . . . . . . . . . . . . . . . . .45

4.11.2 Recall from SEQUENCE Memory . . . . . . . . . . . . . . . . . . . 45

4.12 Disabling Front Panel Controls . . . . . . . . . . . . . . . . . . . . .46

4.13 The <ENTER> Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

4.14 The <CE/LOCAL> Key . . . . . . . . . . . . . . . . . . . . . . . . . . .46

Automatic Sequence Run and Step-by-Step Sequence Control . . . . . 40

Displaying Stored Data Upon Execution of <RCL> . . . . . . . . . . .40

Clearing the Contents of a Defined Memory Range . . . . . . . . . .42

4.15 INCR <> and DECR <> Keys . . . . . . . . . . . . . . . . . . .47

4.16 Device RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

Selecting Remote and Local Control Modes . . . . . . . . . . . . . . . . . 47

4.17

5 Analog Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

5.1 Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .48

5.2 Auto-sensing mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

5.3 Regulating Output Voltage . . . . . . . . . . . . . . . . . . . . . . . .50

5.4 Regulating Output Current . . . . . . . . . . . . . . . . . . . . . . . .50

5.5 Voltage Monitoring Output . . . . . . . . . . . . . . . . . . . . . . . .51

5.6 Current Monitoring Output . . . . . . . . . . . . . . . . . . . . . . . .51

5.7 Trigger Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

5.8 Parallel Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .53

5.8.1 Direct Parallel Connection . . . . . . . . . . . . . . . . . . . . . . .53

5.8.2 Master-Slave Parallel Connection . . . . . . . . . . . . . . . . . .54

5.9 Series Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

5.9.1 Direct Series Connection . . . . . . . . . . . . . . . . . . . . . . . .55

5.9.2 Master-Slave Series Connection . . . . . . . . . . . . . . . . . . .56

5.10 Varying the Internal Output Resistance Value . . . . . . . . . .57

6 Operating Commands . . . . . . . . . . . . . . . . . . . . . . . . . .58

6.1 Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .58

6.2 IEEE 488 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . .59

6.3 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .59

6.4 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

6.5 Status and Events Management . . . . . . . . . . . . . . . . . . . .77

7 Adjusting the SSP KONSTANTER . . . . . . . . . . . . . . . . . .79

8 Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83

8.1 Adjustable Functions and Parameters . . . . . . . . . . . . . . . .83

8.2 Queriable Functions and Parameters . . . . . . . . . . . . . .85

8.3 Query Command for Status and Events Management . .87

8.4 Overview of Menu Functions . . . . . . . . . . . . . . . . . . . .88

8.5 Memory Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

8.6 System Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

8.7 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91

9 Order Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

10 Repair and Replacement Parts Service,

DKD Calibration Lab and

Rental Instrument Service . . . . . . . . . . . . . . . . . . . . . . .92

11 Product Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

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I Initial Inspection

Important Warnings

Immediately after receipt, unpack the KONSTANTER and all included accessories, and inspect for damage and completeness.

Unpacking

• Other than the usual care exercised in handling electronic equipment, no additional precautions are required when unpacking the instrument.

• The KONSTANTER is delivered in recyclable packaging, which provides for adequate protection during transport as substantiated by testing. If the instrument is repacked at a later point in time, the same packaging, or its equivalent, must be used.

Visual Inspection

• Compare the order number or type designation included on the packaging and/or the serial plate with the particulars shown in the shipping documents.

• Make sure that all accessory components have been included ( Kap. 1.3, “Options and Accessories”).

• Inspect the packaging, as well as mechanical instrument and accessory components for possible transport damage.

Complaints

If damage is discovered, immediately file a claim with the freight forwarder (save the packaging!). If other defects are detected, or in the event that service is required, inform your local representative, or contact us directly at the address included in the last page of this handbook.

II Warnings and Safety Precautions

The KONSTANTER has been manufactured and tested in accordance with the electrical safety regulations listed in the technical data as a safety class I device, and has been shipped from the factory in flawless technical safety condition. In order to maintain this condition and to assure safe operation, users must observe all notes and warnings included in these operating instructions. These are identified with the following headings:

Caution! A note concerning operation, practical advice or other information which must be adhered to in order to prevent damage to the KONSTANTER, and to assure correct operation.

WARNING! An operating procedure, practical advice or other information which must be adhered in order to assure safe operation of the KONSTANTER, and to prevent personal injury. The most important warnings are summarized below. Reference is made to these warnings at appropriate points within the operating instructions.

WARNING I – Protective Grounding

The KONSTANTER may only be placed into operation after the protective conductor has been connected. Interruption of the protective conductor, either inside or outside of the KONSTANTER, or disconnection of the protective conductor terminal may transform the KONSTANTER potential danger. Intentional interruption is prohibited.

62N: The device is connected to the mains by means of a 3 conductor cable with mains plug. The plug may only be inserted into a suitable outlet with earthing contact. This safety precaution must not be defeated though the use of an extension cable without protective conductor.

64N: These devices are permanently connected to the mains with a 5-pole terminal block for 3-phase current (5 conductor).

WARNING II – Impaired Safety

If it can be assumed that safe operation is no longer possible, the KONSTANTER against inadvertent use. It must be assumed that safe operation is no longer possible:

•If the KONSTANTER

• After lengthy periods of storage under conditions which deviate from specified storage conditions

• After extraordinary stressing due to transport

WARNING III – Opening Housing Panels

Voltage conducting parts may be exposed when housing panels are opened, as long as the KONSTANTER power.

Any contact with these exposed conductive parts is life endangering.

For this reason, housing panels may only be opened and/or removed by trained personnel who are familiar with the dangers involved.

WARNING IV – Repair by Trained Personnel

Voltage conducting parts may be exposed when housing panels are opened, as long as the KONSTANTER power.

Maintenance and repair work, as well as internal balancing, may only be performed by trained personnel who are familiar with the dangers involved.

The KONSTANTER sources before work of this type is performed, in as far as this is possible. A 5 minute waiting period must be observed after disconnection in order to allow internal capacitors to discharge to safe voltage levels.

WARNING V – Fuse Replacement

Only specified fuse types with the specified nominal current rating may be used to replace blown fuses (see Technical Data and specifications on the serial plate).

Tampering with fuses or fuse holders is prohibited (“repairing” fuses, short-circuiting fuse holders etc.).

must be removed from service and secured

demonstrates visible damage no longer functions

must be disconnected from all external power

into a source of

is connected to supply

Significance of Symbols

Indicates EC conformity

Observe EGB directives Warning concerning a source of danger

(attention: observe documentation!) This device may not be disposed of with the trash. Further

information regarding the WEEE mark can be accessed on the Internet at www.gossenmetrawatt.com by entering the search term ’WEEE’.

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1 Technical Description

1.1 Features and Range of Applications

SSP KONSTANTERs (single-output system power supplies) are manual and remote controllable DC power supplies for laboratory and system use. Despite high output power, the power supplies are small and lightweight.

The floating output features “safety electrical separation” from the mains input as well as optional computer interfaces, and is classified as a safety extra-low voltage circuit (SELV) in accordance with VDE/IEC. Wide ranging nominal power values are available from the voltage and current controlled output.

The devices are generally equipped with a control panel and display, as well as an analog interface. An additional interface can be plugged into the device for integration into computer controlled systems. Two interface variants are available to this end, as described in chapter 1.3. Manual adjustment of voltage and current is accomplished by means of two rotary knobs with selectable adjusting sensitivity. Numerous additional functions can be activated with various keys (see table below). Two 4-place digital LED displays read out measured values and settings. LEDs indicate the current operating mode, selected display parameters and the status of device and interface functions. The analog interface can be used to set output voltage and current with the help of external control voltages, and also serves to link several devices for master-slave operation. Deactivation of the output, control panel disabling and individual or sequential retrieval of saved settings can be controlled via the floating optocoupler input.

1.2 Functions

Adjustable functions:

– Voltage and current setpoint values – Voltage and current limit values (soft-limits) – Activate / deactivate the output – Overvoltage protection trigger value – Overcurrent response (limiting with or without shutdown) – Delay time for overcurrent protection – Starting performance (power-on status) – Reset device settings – Save device settings – Recall device settings individually or sequentially – Control panel disabling – Function selection for trigger input – Round off measured value for display – Service request masks (SRQ masks) – Activate/deactivate digital displays – Self-triggering when mains power is switched on

Retrievable information:

– Momentary measured voltage and current values – Minimum and maximum measured voltage and current values – Momentary output power – Current device settings (individual or complete) – Current device status (control mode, overtemperature, busy) – Occurred events (mains or phase failure, overtemperature,

overvoltage, overload, programming error)

–Device ID

Additional Functions

– Sensor terminals protected against polarity reversal and

automatic switching to auto-sensing – Overtemperature protection – Output protected against reverse polarity

– Backup battery for device settings memory – Recognition of mains or phase failure – Inrush current limiting

Via computer interfaces only

1.3 Options and Accessories

Devices can be equipped with a plug-in interface module (2 variants) for integration of SSP KONSTANTERs into computer controlled systems.

Variant 1 includes one digital computer interface: – One V.24 / RS 232C bit-serial interface

This interface is provided in minimized format only (conductors: RxD, TxD, GND).

Variant 2 includes two digital computer interfaces: – One IEC 625 bit-parallel, byte-serial interface

This interface fulfills all requirements of the IEEE 488 standard and is commonly designated as a GPIB (general purpose interface bus) or an HP-IB (Hewlett Packard interface bus).

– One V.24 / RS 232C bit-serial interface

This interface is provided in minimized format only (conductors: RxD, TxD, GND).

Programming of all device functions, as well as querying of measured and configured parameters is possible via both interfaces. The IEC bus interface provides several additional, specific interface functions.

The interface option is supplied as a separate plug-in module and can be easily plugged into the device at the rear.

Included accessories:

– 1 set operating instructions – 1 mounting kit for rack installation – 1 mains power cable with earthing contact plug

(for 62 N only)

Additionally available accessories:

– RS 232 bus cable – IEEE – IEEE bus cable – Device driver for LabView software – Device driver for LabWindows / CVI software – Device driver for HPVEE / VXI PnP software

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1.4 Functional Principle

62 N: D

64 N: I+K+M

Figure 1.4 shows a schematic diagram of the SSPKONSTANTER. The delineations indicate distribution of the circuit to the individual printed circuit boards, as well as subdivision of

the mains power circuit, the control and interface circuit, and the output circuit.

Figure 1.4 Schematic Diagram of the SSP KONSTANTER

Printed Circuit Board Functions Overview

PCB A: Central processing unit PCB B: IEEE 488 – RS 232C interface (optional) PCB C: Control panel and display PCB D:

Mains input circuit, 0.5 / 1 KW (filter, rectification, screening) PCB E: Chopper and power transformer PCB F: Power output circuit (rectification, filtering, sink) PCB G: Regulator PCB H: HF output filter PCB I: PCB K:

Mains input circuit, 2 / 3 KW (filter, rectifier, screening)

Mains input circuit, 3 KW (filter, rectification, screening) PCB M: Line filter choke

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Power Supply

Required DC supply power is generated for each respective circuit from mains power which has been fed to the power pack via an interference suppression filter, a wire fuse, the mains switch and inrush current limiting. Series 64 N SSP KONSTANTERs are supplied with power from a 3-phase mains system (relative to the neutral conductor).

Central Processing Unit (CPU)

Overall control of the SSP-KONSTANTER is accomplished by means of the CPU on PCB A. It uses an 80C32 8-bit microcontroller with 64 kilobytes of program memory and 32 kilobytes of battery-backed CMOS RAM.

An 11 MHz pulse generator establishes the clock frequency for the processor, and creates a time reference for the measuring function and the serial interface.

A watchdog circuit monitors processor activity and disables access to battery-backed RAM in the event of supply power failure.

Operation

The SSP-KONSTANTER can be operated with the controls at the front panel, or by means of the optional IEEE 488 and RS 232C plug-in interface module.

Displays and Control Panel

The two 4-place, 7-segment displays and the keys at the front panel are managed by a controller module in multiplex mode. The individual LEDs are driven statically via a register, and the rotary pulse encoders control increment-decrement counters relative to direction of rotation. Each time an adjusting element is activated, an interrupt occurs at the CPU which then causes an appropriate response.

Interface Option

If the SSP-KONSTANTER is equipped with a plug-in interface module, the device can also be controlled either via the IEEE 488 bus or the RS 232C serial interface.

Remote Control

Device messages received by the interface are forwarded to the CPU where they are first saved to RAM. After receiving an end-ofmessage character, data are checked for correct syntax, plausibility and limit values. Valid commands are subsequently executed.

Setup Procedure

Setup data are processed and forwarded to the respective function unit via I/O control and an optocoupler assuring electrical isolation. Each setting value for output voltage, output current or overvoltage protection triggering is converted to a proportional control voltage by a 12 bit DAC, and is fed to the respective controller or comparator as a setpoint or a reference quantity.

Actual output voltage is ascertained by a voltage monitor, whose automatic sensor switching inputs are connected either to the output terminals or the sensor terminals.

Actual output current is acquired as a voltage drop at a shunt located in the negative output conductor, and is amplified by the current monitor to a scaled signal.

In order to achieve rapid downward adjustment of output voltage even with minimal output load, the device is equipped with a limited sink function (limited to approximately 25 W per 1000 W output power) for discharging the output capacitor. This function is activated as long as output voltage exceeds the current setpoint value (also in the event of energy recovery from a parallel connected voltage source).

The source and sink function is enabled when the output On / Off controls are set to ON, and the source function is disabled when controls are set to Off and the sink setpoint is set to Unominal after approximately 300 ms (high impedance for Uout < Unominal).

Measuring Procedure

Monitor amplifier output signals, which are proportional to actual output voltage and current, are fed to an analog multiplexer (MUX) which switches one of the two signals to the input of the analogdigital converter (ADC) depending upon the desired measured quantity. The ADC functions in accor

with the synchronous

dance voltage-frequency conversion principle, and makes a squarewave signal available at its output whose frequency is proportional to the measured quantity fed to the input. An optocoupler is used to assure electrically isolated signal transmission to a binary counter whose 40 ms gating time is derived from the quartz controlled pulse frequency of the CPU by means of an additional counter. After gating time has elapsed, the CPU acquires the counter value and calculates a measured value which is saved to RAM as a decimal number. Depending upon the circumstances, the measured value display is refreshed, an extreme value comparison is performed for the Min-Max function or the measured value is made available at the computer interface’s data output buffer.

Monitoring Functions

– Control Mode Recognition and Overload

An electrically isolated digital signal is derived from the output signals of the voltage and current regulators, which indicates the currently active control mode (constant voltage or constant current mode), as long as overload protection is not active. “Overload” indicates that power limiting has been triggered as a result of selected parameter settings and prevailing load. These operating conditions are evaluated by the CPU (e.g. for OCP function), are indicated with LEDs and are used to generate status and event registers for computer control.

– Overvoltage Monitoring

If the voltage monitor is bypassed, device output voltage is additionally compared to an adjustable limit value within a range of 3 V to 120% nominal voltage by a comparator, and the output is deactivated if the limit value is exceeded and an OVP message is generated (LED display, status and events register).

– Temperature Monitoring

Temperature is converted to a proportional electrical signal by PTC resistors at representative points (conductor bar, diode stack, choke and additional switching transistors (for series 62 N, 500 W)) and are fed to a two-step threshold trigger. The lower threshold value corresponds to a temperature of approximately 75° C, and the upper threshold value is approximately 85° C. As soon as the lower threshold is exceeded at any of the temperature sensors, the fan(s) is/are switched to high speed by the fan controller. The device can be operated at any output load up to the maximum specified operating temperature after this ventilation has been activated. If ventilation is impeded, or at excessive ambient temperatures, temperature at the sensor may reach the upper threshold. If this is the case, an overtemperature message is entered to the status and events register. After 5 seconds, the OTP LED is activated and the output is shut down by the CPU. After sufficient cooling has occurred, the status message is cleared and a ready for operation message is entered to the event register. If the POWER-ON function is set to “Recall”, the output is reactivated automatically. If the POWER-ON function is set to “Standby” or “Reset”, the output remains deactivated and can only be reactivated by pressing the OUTPUT key, or by means of a command from the control computer. After actual temperature has fallen to below the lower threshold value, fan speed is reduced automatically.

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1.5 Technical Data

U / V

nominal

0,5

nominal

typ

dyn

(< 5 ms)

0.5 I

nominal

nom

I / A

Voltage Setting Range

Current Setting Range

typ

 1.3 x P

nominal

1.5.1 General Data

Output

Regulator type Primary switched-mode regulator Operating modes Adjustable constant voltage / constant

current source with automatic sharp transition

Output insulation Floating output with “safe electrical

separation” from the mains input and computer interfaces Max. allowable potential, output to ground: 120 V Capacitance, output to ground (housing) Series 62 N: 500 W / 1000 W: typ. 90 nF Series 64 N: 2000 W / 3000 W: typ. 180 nF

Output operating range

Power Supply

Line voltage 62 N: 230 V ~ +10 / –15%,

47 … 63 Hz

64 N: 3 x 400 / 230 V ~ +10 / -15%,

47 … 63 Hz

Inrush Current Max. 50 A

Fuse 62 N: 1 ea. M 15 A / 250 V

(6.3 x 32 mm), UL

64 N: 3 ea. M 15 A / 250 V

(6.3 x 32 mm), UL

Electrical Safety

Safety class I Overvoltage

category II for mains input

I for output and interfaces Fouling factor 2 Earth leakage

current 62 N: <3 mA

64 N: <1 mA

eff

Electrical Isolation Rated Voltage Test Voltage Output – mains 280 V

eff

4 kV ~ (type test)

Output – bus / ground 120 V

1.5 kV ~

Mains – bus / ground 230 V

eff

2.2 kV –

Bus – ground No electrical isolation

Analog Interface

Functions – Auto-sensing mode

– Programmable trigger input – Voltage control input (0 ... 5 V) – Current control input (0 ... 5 V) – Voltage monitor output (0 ... 10 V) – Current monitor output (0 ... 10 V) – Master-slave parallel operation – Master-slave series operation

IEC 625 – IEEE 488 interface (common option with RS 232, variant 2)

Interface functions (see chapter 6.2 for description of functions.)

SH1 – SOURCE HANDSHAKE AH1 – ACCEPTOR HANDSHAKE T6 – TALKER L4 – LISTENER TE0 No extended talker function LE0 No extended listener function SR1 – SER VICE REQUEST

RL1 – REMOTE / LOCAL DC1 – DEVICE CLEAR PP1 – PARALLEL POLL DT1 – DEVICE TRIGGER C0 – No controller function E1 / 2 – Open collector driver

Codes / formats per IEEE 488.2 Max. setting rate approx. 40 settings per second Max. sampling rate approx. 15 measurements per second

V.24 – RS 232C Interface (optional, variant 1 or 2)

Transmission mode half-duplex, asynchronous Baud rate 110 ... 19,200 baud, adjustable Codes / formats Per IEEE 488.2 Max. setting rate Approx. 2 settings per second Max. sampling rate Approx. 2 measurements per second

IEC 61010-1: 1990 + A1: 1992 DINEN61010-1: 1993 VDE 0411-1: 1994 DIN VDE 0160: 1988 + A1: 1989 class W1 VDE 0805: 1990 EN 60950: 1992

Protection IP 00 at device terminals and

interface terminals IP 20 at housing

Electromagnetic Compatibility

Product standard EN 61326-1: 1997 + A1: 1998 Interference

emission EN 55022: 1998 class A Interference

immunity EN 61000-4-2: 1995, feature B

EN 61000-4-3: 1996 + A1: 1998, feature A EN 61000-4-4: 1995, feature C EN 61000-4-5: 1995, feature B EN 61000-4-6: 1996, feature B EN 61000-4-11: 1994, feature A

Ambient Conditions

Climatic category KYG per DIN 40 040 Temperature range Operation: 0 to 40° C

Storage: –20 to +70° C

Relative humidity Operation:  75%,

no condensation allowed

Storage:  65%

Cooling With integrated fan

(2-step temperature control) Inlet vent: side panel Outlet vent: rear panel

Operating noise Noise pressure level at a distance of 30 cm

with fan set to low / high

62 N: 64 N: front 18 / 28 dBA 20 / 30 dBA rear 23 / 35 dBA 26 / 38 dBA left and right 20 / 30 dBA 26 / 36 dBA

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1.5.2 Mechanical Data

TxD_IN 2

RxD_IN

GND_IN

2 RxD

3 TxD

5 GND

SSP

9-pin subminiature9-pin subminiature

PC / Controller

socket connector plug connector

RS 232

COM1/COM2

Twist with opposing wires

Remote enable

Data bus

Shield connected to ground

Attention Service request Interface clear No data accepted

Data valid End or identify

Data bus

Not ready for data

Module Type

Benchtop device, suitable for rack mounting

Dimensions (W x H x D) See also dimensional drawings.

62 N: 19" x 2 std. height units x 500 mm 64 N: 19" x 4 std. height units x 500 mm

Weight 62 N: 500 W: approx. 12 kg

1000 W : approx. 13 kg

64 N: 2000 W: approx. 22 kg

3000 W : approx. 28 kg

RS 232C interface (optional) approx. 0.1 kg

IEEE 488 – RS 232C interface (optional) approx. 0.14 kg

Terminals (rear panel)

Main input 62 N: 10 A IEC inlet plug with

earthing contact (L + N + PE)

64 N: 5-pole screw terminal block

for cable connection,

0.75 ... 2.5 mm2 (3 L + N + PE)

Output Bus bars with drill holes for M8 screws and 4

mm diameter drill holes

Analog interface 14-pin plug connector with screw clamps

IEC 625 – IEEE 488 Interface (option b)

24-pin IEEE 488 socket connector IEC 625.1, IEEE 488.1

Connector Pin Assignments

Interface Options:

a) RS 232C b) IEEE 488 / RS 232C

RS 232C interface (option a, b)

9-pin subminiature connector socket DIN 41652

Connector Pin Assignments

Pin 2: TXD (transmit data) Pin 3: RXD (receive data) Pin 5: GND (ground)

Figure 1.5.2 Connector Cable for Serial Interface

GMC-I Messtechnik GmbH 9

Page 10

Dimensional Drawings Series 62 N

449

465

482.6

500

76.2

Slot for optional IEEE-488 – RS 232C or RS 232C interface, IEEE-488 – RS 232C interface is shown here (part no. K382A).

All dimensions in mm

10 GMC-I Messtechnik GmbH

Page 11

40500

449

465

482.6

All dimensions in mm

Shown with optional RS 232C

interface (part no. K383A).

Series 64 N

GMC-I Messtechnik GmbH 11

Page 12

1.5.3 Electrical Data

Electrical Data for 52 V Models: xx N 52 RU ... Unless otherwise specified, entries are maximum values and

apply within an operating temperature range of 0 to 50° C after a warm-up period of 30 minutes.

Article Number K344A K345A K352A K362A Type 62 N 52 RU 25 P 62 N 52 RU 50 P 64 N 52 RU 100 P 64 N 52 RU 150 P Nominal output data Voltage setting range

Current setting range

Output characteristics (ppm and percentage values make reference to the respective setting or measuring range) Setting resolution Voltage

Current

Setting accuracy (at 23 ± 5° C) Voltage

Current

Temperature coefficient of the setting / K

Static system deviation with 100% load fluctuation

Static system deviation with 15% line voltage fluctuation

Voltage Current

Residual ripple U

Ripple 10 Hz … 300 Hz

Ripple 10 Hz … 300 kHz

Ripple + noise 10 Hz … 10 MHz

Tol er an ce Output voltage transient recovery time with load step within range of 20 to 100% I

nominal

Output voltage over and undershooting with load step within range of 20 to 100% I

Output voltage response time where Uset step = 0 V –> U where Uset step = U

nominal

–> 1 V No load, nominal load

I = 10 %

I = +80 %

I = -80 %

I = 10 %

I = 80 %

Tol er an ce

No load, nominal load

Output capacitor discharging circuit Nominal value

Power

Measuring Function

Measuring Range Voltage

Current

Power Measuring resolution: local, remote Voltage

Current

Power Measuring accuracy (at 23 ± 5° C) Voltage

Current

Power Measured value temperature coefficient /K Voltage

Current

Protective functions

Trigger value for output overvoltage protection

Setting range

Setting resolution

Setting accuracy

Response time

Reverse polarity protection load capacity Continuous 30 A 55 A 110 A 170 A Reverse voltage withstand capacity Continuous 60 V – 60 V – 60 V – 60 V –

Additional Functions

Sensing mode operation Compensatable voltage drop per line 1 V 1 V 1 V 1 V

General

Power Supply Line

voltage

Power consumption At nom. load

At no load Max. power loss 150 W 200 W 700 W 1000 W

Efficiency At nom. load > 75 % > 80 % > 72 % > 75 % Switching frequency Typical 100 kHz 200 kHz 200 kHz 200 kHz

nt Max. 50 A

rre

Inrush cu

Fuses 1 ea. M 15 A / 250 V (6.3 x 32 mm, UL) 3 ea. M 15 A / 250 V (6.3 x 32 mm, UL) MTBF At 40° C > 50,000 h > 47,000 h > 33,000 h > 29,000 h

1) Current setting values are rounded off at the digital display to multiples of 10 mA (< 100 A) or 100 mA ( 100 A).

2) In sensing mode at the output terminals

3) At maximum current setting not including processing time for the previous voltage setting command

Power

0 ... 52 V 0 ... 25 A max. 500 W

16.7 mV

6.25 mA

0.1 % +17 mV

0.2 % +25 mA

50 ppm +0.2 mV 100 ppm +0.2 mA

0.01 % +5 mV

0.05 % +10 mA

0.01 % +5 mV

0.03 % +8 mA

12 mV

30 mV

50 mVss / 10 mV 15 mA

eff

80 mV 100 µs 300 µs 900 µs

150 mV 500 mV

80 mV 6 ms, 12.5 ms 150 ms, 12.5 ms

2000 µF 25 W

-2.666 … +58.770 V

-0.48 … +26.68 A 0 … >550 W

10 mV, 3.3 mV 5 / 10 mA, 5 mA 1 W, 0.1 W

0.05% +20 mV

0.3 % +20 mA

0.4% +1 W

80 ppm +0.2 mV 150 ppm +0.2 mA

3 … 62.5 V 100 mV

0.3% + 100 mV 200 µs

230 V~ + 10 / – 15% 47 … 63 Hz

1100 VA, 650 W 50 VA, 25 W

0 ... 52 V 0 ... 50 A max. 1000 W

16.7 mV

12.5 mA

0.1 % +17 mV

0.2 % +50 mA

50 ppm +0.2 mV 100 ppm +0.2 mA

0.01 % +5 mV

0.05 % +20 mA

0.01 % +5 mV

0.03 % +15 mA

15 mV

30 mV

50 mVss / 10 mV 25 mA

eff

80 mV 100 µs 300 µs 300 µs

150 mV 750 mV

80 mV 6 ms, 12.5 ms 150 ms, 12.5 ms

2000 µF 25 W

-2.666 … +58.770 V

-1.92 … +53.37 A 0 … >1100 W

10 mV, 3.3 mV 10 mA, 10 mA 1 W, 0.1 W

0.05% +20 mV

0.3 % +30 mA

0.4% +1.5 W

80 ppm +0.2 mV 150 ppm +0.2 mA

3 … 62.5 V 100 mV

0.3% + 100 mV 200 µs

230 V~ + 10 / – 15% 47 … 63 Hz

1800 VA, 1200 W 50 VA, 25 W

50 A

0 ... 52 V 0 ... 100 A max. 2000 W

16.7 mV 25 mA

0.1 % +17 mV

0.25 % +100 mA

50 ppm +0.2 mV 100 ppm +0.4 mA

0.01 % +5 mV

0.05 % +40 mA

0.01 % +5 mV

0.03 % +30 mA

20 mV

30 mV

50 mVss / 10 mV 80 mA

eff

80 mV 100 µs 300 µs 300 µs

150 mV 750 mV

80 mV 6 ms, 12.5 ms 150 ms, 12.5 ms

4000 µF 50 W

-2.666 … +58.770 V

-3.84 … +106.74 A 0 … >2200 W

10 mV, 3.3 mV 20 mA, 20 mA 1 W, 0.1 W

0.05% +20 mV

0.4% +60 mA

0.5 % +2.5 W

80 ppm +0.2 mV 150 ppm +0.4 mA

3 … 62.5 V 100 mV

0.3% + 100 mV 200 µs

3 x 400 / 230 V~ + 10 / – 15 % 47 … 63 Hz

5000 VA, 2800 W 150 VA, 40 W

50 A

0 ... 52 V 0 ... 150 A max. 3000 W

16.7 mV 40 mA

0.1 % +17 mV

0.3 % +150 mA

50 ppm +0.2 mV 100 ppm +0.6 mA

0.01 % +5 mV

0.05 % +60 mA

0.01 % +5 mV

0.03 % +40 mA

20 mV

30 mV

50 mVss / 10 mV 120 mA

eff

80 mV 100 µs 300 µs 300 µs

150 mV 750 mV

80 mV 6 ms, 12.5 ms 150 ms, 12.5 ms

6000 µF 75 W

-2.666 … +58.770 V

-5.76 … +160.12 A 0 … >3300 W

10 mV, 3.3 mV 2 / 100 mA, 20 mA 1 W, 0.1 W

0.05% +20 mV

0.4% +90 mA

0.4% +4 W

80 ppm +0.2 mV 150 ppm +0.6 mA

3 … 62.5 V 100 mV

0.3% + 100 mV 200 µs

3 x 400 / 230 V~ + 10 / – 15 % 47 … 63 Hz

7400 VA, 4000 W 160 VA, 55 W

50 A

12 GMC-I Messtechnik GmbH

Page 13

Electrical Data for 80 V Models: xx N 80 RU ... Unless otherwise specified, entries are maximum values and

apply within an operating temperature range of 0 to 50° C after a warm-up period of 30 minutes.

Article Number K341A K343A K351A K361A Type 62 N 80 RU 12.5 P 62 N 80 RU 25 P 64 N 80 RU 50 P 64 N 80 RU 75 P Nominal output data Voltage setting range

Current setting range

Output characteristics (ppm and percentage values make reference to the respective setting or measuring range) Setting resolution Voltage

Current

Setting accuracy (at 23 ± 5 °C) Voltage

Current

Temperature coefficient of the setting / K

Static system deviation with 100% load fluctuation

Static system deviation with 15% line voltage fluctuation

Voltage Current

Residual ripple U

Ripple 10 Hz … 300 Hz

Ripple 10 Hz … 300 kHz

Ripple + noise 10 Hz … 10 MHz

Tol er anc e Output voltage transient recovery time with load step within range of 20 to 100% I

nominal

Output voltage over and undershooting with load step within range of 20 to 100% I

Output voltage response time where Uset step = 0 V –> U where Uset step = U

nominal

–> 1 V No load, nominal load

I = 10 %

I = +80 %

I = -80 %

I = 10 %

I = 80 %

Tol er an ce

No load, nominal load

Output capacitor discharging circuit Nominal value

Power

Measuring Function

Measuring Range Voltage

Current

Power Measuring resolution: local, remote Voltage

Current

Power Measuring accuracy (at 23 ± 5° C) Voltage

Current

Power Measured value temperature coefficient / K Voltage

Current

Protective functions

Trigger value for output overvoltage protection

Setting range

Setting resolution

Setting accuracy

Response time

Reverse polarity protection load capacity Continuous 30 A 55 A 110 A 170 A Reverse voltage withstand capacity Continuous 100 V – 100 V – 100 V – 100 V –

Additional Functions

Sensing mode operation Compensatable voltage drop per line 1 V 1 V 1 V 1 V

General

Power Supply Line voltage 230 V~ + 10 / – 15%

Power consumption At nom. load

At no load Max. power loss 150 W 200 W 700 W 1000 W

Efficiency At nom. load > 74 % > 85 % > 80 % > 80 % Switching frequency Typical 100 kHz 200 kHz 200 kHz 200 kHz Inrush current Max. 50 A

Fuses 1 ea. M 15 A / 250 V (6.3 x 32 mm, UL) 3 ea. M 15 A / 250 V (6.3 x 32 mm, UL) MTBF at 40 °C > 50,000 h > 47,000 h > 33,000 h > 29,000 h

1) Current setting values are rounded off at the digital display to multiples of 10 mA (< 100 A) or 100 mA ( 100 A).

2) In sensing mode at the output terminals

3) At maximum current setting not including processing time for the previous voltage setting command

Power

0 ... 80 V 0 ... 12.5 A max. 500 W

20 mV

3.125 mA

0.1 % +20 mV

0.2 % +15 mA

50 ppm +0.4 mV 50 ppm +0.2 mA

0.01 % +5 mV

0.05 % +10 mA

0.01 % +5 mV

0.03 % +5 mA

35 mV

50 mV

60 mVss / 10 mV 15 mA

eff

160 mV 100 µs 700 µs 700 µs

200 mV 500 mV

160 mV 5 ms, 15 ms 300 ms, 15 ms

2000 µF 25 W

-4.00 … +88.16 V

-0.48 … +13.34 A 0 … >550 W

10 mV 2 / 10 mA, 2 mA 1 W, 0.1 W

0.05% +40 mV

0.3 % +10 mA

0.4% +1 W

80 ppm +0.4 mV 150 ppm +0.1 mA

3 … 100 V 100 mV

0.3% + 100 mV 200 µs

47 … 63 Hz

1150 VA, 680 W 50 VA, 25 W

0 ... 80 V 0 ... 25 A max. 1000 W

20 mV

6.25 mA

0.1 % +20 mV

0.2 % +25 mA

50 ppm +0.4 mV 100 ppm +0.1 mA

0.01 % +5 mV

0.05 % +10 mA

0.01 % +5 mV

0.03 % +10 mA

35 mV

50 mV

eff

80 mVss / 15 mV 20 mA

eff

160 mV 100 µs 400 µs 800 µs

200 mV 650 mV

160 mV 5 ms, 10 ms 300 ms, 15 ms

2000 µF 25 W

-4.00 … +88.16 V

-0.96 … +26.68 A 0 … >1100 W

10 mV 5 mA, 10 mA 1 W, 0.1 W

0.05% +40 mV

0.3 % +20 mA

0.4% +1.5 W

80 ppm +0.4 mV 150 ppm +0.1 mA

3 … 100 V 100 mV

0.3% + 100 mV 200 µs

230 V~ + 10 / – 15% 47 … 63 Hz

1750 VA, 1150 W 50 VA, 25 W

50 A

0 ... 80 V 0 ... 50 A max. 2000 W

20 mV

12.5 mA

0.1 % +20 mV

0.25 % +50 mA

50 ppm +0.4 mV 100 ppm +0.2 mA

0.01 % +5 mV

0.05 % +20 mA

0.01 % +5 mV

0.03 % +20 mA

35 mV

50 mV

80 mVss / 15 mV 30 mA

eff

160 mV 100 µs 400 µs 800 µs

200 mV 650 mV

160 mV 5 ms, 10 ms 300 ms, 15 ms

4000 µF 50 W

-4.00 … +88.16 V

-1.92 … +53.37 A 0 … >2200 W

10 mV 10 mA, 10 mA 1 W, 0.1 W

0.05% +40 mV

0.3 % +30 mA

0.4% +2.5 W

80 ppm +0.4 mV 150 ppm +0.2 mA

3 … 100 V 100 mV

0.3% + 100 mV 200 µs

3 x 400 / 230 V~ + 10 / – 15 % 47 … 63 Hz

4800 VA, 2500 W 150 VA, 40 W

50 A

0 ... 80 V 0 ... 75 A max. 3000 W

20 mV 20 mA

0.1 % +20 mV

0.3 % +80 mA

50 ppm +0.4 mV 100 ppm +0.4 mA

0.01 % +5 mV

0.05 % +30 mA

0.01 % +5 mV

0.03 % +30 mA

35 mV

50 mV

eff

80 mVss / 15 mV 60 mA

eff

160 mV 100 µs 400 µs 800 µs

200 mV 650 mV

160 mV 5 ms, 10 ms 300 ms, 15 ms

6000 µF 75 W

-4.00 … +88.16 V

-2.88 … +80.06 A 0 … >3300 W

10 mV 10 mA, 10 mA 1 W, 0.1 W

0.05% +40 mV

0.4% +40 mA

0.4% +4 W

80 ppm +0.4 mV 150 ppm +0.4 mA

3 … 100 V 100 mV

0.3% + 100 mV 200 µs

3 x 400 / 230 V~ + 10 / – 15 % 47 … 63 Hz

7000 VA, 3800 W 160 VA, 55 W

50 A

GMC-I Messtechnik GmbH 13

Page 14

2 Initial Start-Up

2.1 Preparing for Operation

Note: Numbers in brackets refer to figures in chapter 3.

2.1.1 Installing the Optional IEEE 488 – RS 232C Interface Module

Variant 1 or 2, see chapter 1.3.

Caution!

The device must be switched off when installing the interface module. The interface module may be damaged by electrostatic discharge. Observe guidelines for handling electrostatic sensitive devices. Do not touch electrical contacts or PCB components.

1. Unscrew the cover plate at the left-hand side of the rear housing panel.

2. Carefully insert the interface module into the open slot and press it onto the plug connector.

3. Fasten the interface module with the screws taken from the cover plate.

2.1.2 Installation to 19'' Device Racks

The SSP-KONSTANTER housing allows for use as a benchtop instrument, as well as for installation to a 19'' rack. The benchtop instrument can be quickly converted to a rack mount device:

1. Unscrew the handles at the front.

2. Pull out the filler strips at the sides and replace them with the included rack-mount fastening tabs.

3. Replace the front handles (if you prefer to leave the handles out, turn M4 screws with a maximum length of 8 mm in to the open threaded holes.)

4. Unscrew the feet from the bottom of the housing.

5. Save all loose parts for possible future use.

Attention! The device must be attached to guide rails at both sides of the rack. The guide rails, as well as the front panel mounting screws, are rack-specific and must be procured from your rack supplier.

2.1.3 Connection to the Mains

Observe WARNING I!

Caution!

Before switching the SSP KONSTANTER on, it must be assured that available mains power complies with the supply power values specified at the mains connection on the back of the device.

– Series 62 N (500 W, 1000 W) :

These devices require 230 V supply power and are connected to a mains outlet with earthing contact with the included power cable via the mains connector plug [35] at the rear panel.

– Series 64 N (2000 W, 3000 W):

WARNING!

These devices may only be connected to mains supply power by a qualified electrician.

These devices require 3-phase 120/400 V supply power with neutral and phase conductors (3 L + N + PE).

A 5-conductor power cable with a minimum wire cross-section of 1.5 square mm is required for connection to mains supply power, and is connected to the terminal block [35] at the rear panel:

L1: Phase L2: P hase L3: P hase N: N eutral conductor

PE: Pr otective conductor The cable must be secured with the cable clamp [38] for reliable strain relief.

2.1.4 Connecting Power Consumers

The output leads are connected to the output terminal bars [33] at the rear panel by means of ring-type cable lugs. The terminal bars are equipped with drill holes for M8 screws to this end. 4 mm drill holes are included as well, which can be used for connecting measurement cables, ground cables or cable shields.

Connection:

 Remove the safety cap.  Connect the output leads to the terminal bars with suitable

screws and washers.

 Make sure that the utilized cables have an adequate cross-

section, and that polarity is not reversed. It is advisable to twist the output leads and to identify polarity at both ends.

 Avoid exerting of force at the terminal bars.  Arrange the leads such that they can be fed through the

opening in the safety cap.

 Snap the safety cap back into place. In order to be able to take advantage of highly constant output

voltage at the consumer even if long leads are used, sensing leads can be used to compensate for voltage drops within the output leads ( chapter 5.2).

2.1.5 Connection to Computer Interfaces

If the device is used within computer controlled systems, one of the two connections described below must be established via the optional interface.

Comment

The device cannot be remote controlled via both interfaces simultaneously. The interface which first initiates action after mains power has been switched on is activated, and the other remains inactive.

In order to assure that existing bus activity is not interfered with, all affected devices should be switched off while establishing the bus connection.

Both interfaces are equipped with a common ground are electrically isolated from the output in accordance with specified electrical safety regulations.

Connection

Configure the interface as described in chapter 4.7.4 before connecting.

a) IEC Bus

Up to 15 IEC bus controlled devices (including controllers) can be interconnected to create a system. These devices are connected to the bus with suitable, commercially available cables with 24-pin plug connectors. If your IEC bus system is equipped with the previously common 25-pin subminiature plug connectors, you will need a suitable adapter cable. Both cable types are available as accessories (see last page). In order to assure reliable data transmission, cable length between devices should not exceed 2 m, and overall length should not exceed 15 m. Double shielded connector cable is recommended if bus devices are operated in proximity to strong sources of interference or their power cables.

(GND), and

14 GMC-I Messtechnik GmbH

Page 15

b) RS 232C Interface

Only two devices can be connected to each other with this serial interface, namely a controller and the device to be controlled. If you intend to control several devices with a single controller, the controller must be equipped with suitable interfaces. Most controllers include two serial ports which are commonly designated COM1 and COM2, and which are equipped with 25 or 9-pin subminiature plug connectors. Suitable cable is available in various lengths from commercial outlets for connecting the SSP-KONSTANTER to the controller. Appropriate adapters are available as well, in the event that your controller is equipped with a 9-pin plug connector. If you intend to fabricate the connector cable yourself, you will need a 3-conductor shielded cable in order to establish the connection as shown in Figure 1.5.2.

2.2 Switching the Instrument On

After the described preparations have been completed, the device can be switched on.  Press the mains switch [4] at the front panel until it snaps into

place in order to turn the device on.

Power-Up Test

After switching the device on, the POWER lamp [5] lights up and the fan is started. The microprocessor included in the device then starts a power-up test. The following operations are performed during the test routine (duration approximately 8 seconds):

– Reset all functional units (except battery-backed configurations

memory) – ROM test –RAM test – Initialize computer interfaces if installed – Ascertain device type – Check the ADC timer – Recall last settings if required

The READY lamp [22] blinks while this routine is running, and all other LEDs and all digital display segments light up (display test). If the device has been equipped with the “IEEE 488 – RS 232 computer interface” option, the selected IEC bus device address then appears briefly at the display (example: “Addr 12”). After successful completion of the self-test, the READY lamp is continuously illuminated and the display is switched to measured value indication for voltage (Uout) and current (Iout).

After initial power-up, the device has the following basic configuration:

 Interface functions Standard “pon” status  Device functions

– Output status Inactive – Voltage setpoint 0 V – Current setpoint 0 A – Voltage setting limit Nominal output voltage – Current setting limit Nominal output current – OVP trigger value 62.5 V (for 52 V models)

100 V (for 80 V models) – Current limiting mode Limiting without shutdown – Shutdown delay 0 ms – TRIGGER input Inactive – Min-Max measured value memory Off – Power ON mode Reset configuration – Manual operation Enabled – Memory contents Deleted

The desired settings can be selected starting with this basic configuration.

After a warm-up period of approximately 30 minutes, the instrument operates at maximum accuracy.

When the device is powered up again at a later point in time, active device configuration depends upon the last setting selected for the POWER_ON function (—> page 70):

– Default settings or – Last used device settings or – Last used device settings and inactive output

Power-Up with RESET

In order to assure that the connected power consumer is not endangered by any previous device settings, the device can be initialized with the “POWER_ON RST” function by pressing and holding the <CE/LOCAL> key during the power-up routine.

In order to switch the device off, activate the mains switch once again. The device is then disconnected from mains power and the output is deactivated. The last device configuration, as well as any settings which have been saved to battery-backed configurations memory, are retained.

Caution!

apid, repeated fashion. This

Avoid switching the device on and off i temporarily impairs the effectiveness of the inrush current limiting function, and may result in a blown fuse.

n a r

If this status is not achieved despite a correctly selected device address (0 to 30), even after repeatedly switching the device on and off with abbreviated self-test, the device is probably defective. If this is the case, contact your local representative.

Abbreviated Power-Up Test

In order to shorten power-up time, or if problems occur with the normal power-up test, an abbreviated power-up test can be used:  With the device switched off, press and hold the <ENTER>

key.

 Turn the mains switch on.  Release the <ENTER> key after approximately 1 second.

If this procedure is used, only essential initialization steps are run during power-up.

GMC-I Messtechnik GmbH 15

Page 16

3 Controls, Display Elements and Terminals

Slot for installing optional interfaces

Shown with optional IEEE 488 – RS 232C interface

12 3 4 5

910

11 12

13 14

15 16

18 1920212223

24 25

26 31 37 36

3433

26 31 32 35 36 37

3834332730

Series 64 N 19" Rack

Series 62 N Rear Panel

Series 62 N 19" Rack

Series 64 N Rear Panel

16 GMC-I Messtechnik GmbH

Page 17

Note: Numbers in brackets make reference to figures on page 19. [1] Rack mounting tabs (included accessories)

for mounting to a 19" rack Assembly: – Unscrew the handles at the front. – Pull out the filler strips at the sides and replace them with

the included rack-mount fastening tabs.

– Replace the front handles.

[2] Front handles

For carrying the device or pulling it from the 19" rack The handles can be removed if desired (turn M4 screws with a maximum length of 8 mm into the empty threaded holes).

[3] Device feet

For use as a benchtop instrument The device can be tilted back slightly by folding the front feet out. As a rule, the feet must be removed in order to install the device to a 19" racks.

[4] Mains switch

For turning the device on and off After switching the device on, a self-test is performed with a duration of approximately 8 seconds. After successful completion of the self-test, the “POWER-ON” function configures the device with predetermined settings and the device is ready for use. When the device is switched off, it is disconnected from mains power and the output is immediately deactivated. The last device configuration, as well as any settings which have been saved to battery-backed configurations memory, are retained.

[5] POWER indicator lamp

Indicates that the device is switched on (power on).

[6] Control mode display

The illuminated LED indicates the current operating status (control mode) of the output, as long as it is active: – Green “CV” LED lights up: constant voltage mode (Uout =

Uset),

– Green “CC” LED lights up: constant current mode (Iout =

Iset)

– Yellow “Pmax” LED lights up: electronic power limiting is

active (Pout > Pnominal)

– No LEDs illuminated: output is inactive

[7] Output On-Off key <OUTPUT>

The power output can be activated and deactivated by pressing the <OUTPUT> key. The respective LED is illuminated as long as the output is active. No significant output voltage overshooting occurs when the output is activated and deactivated. The output capacitor is rapidly discharged by a sink when the output is deactivated. After approximately 350 ms (500 ms for 80 V models), the output becomes highly resistive, but it is not isolated from the output terminals.

[8] Rotary knob for adjusting voltage

Voltage is adjusted in the usual fashion with the rotary knob. However, the adjusting element is not a potentiometer, but rather a rotary pulse encoder which generates 24 pulses per revolution, and whose step size per pulse (setting resolution) can be adjusted to either coarse, medium or fine with the <RESOL> key [19]. This allows for convenient, precise adjustment on the one hand, and also assures that no change occurs to the selected value when switching between remote control and manual operation. When the voltage adjusting knob is turned, the left display is first switched to the Uset display and the current voltage setpoint appears. After approximately 0.4 seconds, one of the decimal places starts blinking at the display in order to indicate the selected adjusting sensitivity. From this point on, turning the rotary knob changes the display value, and thus the setpoint value, at the selected decimal place. Clockwise

rotation increases the value, and counterclockwise rotation decreases the value. If no adjustment is made for a period of 10 seconds, the display automatically returns to measured voltage value Uout. The display can be immediately switched to the Uout value by pressing the <ENTER> or the <CE/LOCAL> key.

[9] Left-hand display with [10]

Display par

ameter indicators and

[11] Display selector key <SELECT>

As a default setting, measured output voltage value Uout appears in volts at the left-hand display. The display can be switched to any of the following values by (repeatedly) activating the respective <SELECT> key: – Uset = Output voltage setpoint in volts – Ulim = Upper setting range limit for Uset – OVset = Trigger value for output overvoltage protection

in volts

– Pout = Momentary measured output power in watts

(calculated as Uout x Iout) The LEDs assigned to the display indicate the type of displayed values (green LEDs = measured values, yellow LEDs = setting values). If no adjustment is made for a period of 10 seconds during the display of a setting value, the display returns to Uout. Measured power Pout can be indicated at the left, as well as at the right-hand display. This makes it possible to evaluate output power relative to output voltage or output current. Additional device functions can be selected with the <FUNCTION>, <SAVE> and <RCL> keys. The function code appears at the left-hand display in this case. “Err” appears as an identifier for system messages.

[12] Rotary knob for adjusting current <Iset>

The same applies to this rotary knob with reference to output current, as is also the case with the voltage adjusting knob [8].

[13] Right-hand display with [14] Display parameter indicators and [15] Display selector key <SELECT>

As a default setting, measured output current value Iout appears in amperes at the right-hand display. The display can be switched to any of the following values by (repeatedly) activating the respective <SELECT> key: – Iset = Output current setpoint in amperes – Ilim = Upper setting range limit for Iset – DELAY = Shutdown delay time for the OCP function in

seconds – Pout = Currently measured output power in watts

(calculated as Uout x Iout) The LEDs assigned to the display indicate the type of displayed values (green LEDs = measured values, yellow LEDs = setting values). If no adjustment is made for a period of 10 seconds during the display of a setting value, the display returns to Iout. Additional device functions can be selected with the <FUNCTION>, <SAVE> and <RCL> keys. The respective setting parameter or measured value appears at the righthand display in this case. “Err” appears as an identifier for system messages (see chapter 8.6).

[16] Parameter adjusting keys <> and <>

In order to prevent operator errors to the greatest possible extent, the two rotary knobs, [8] and [12], are used exclusively for adjusting output voltage and output current. These two keys are used for the selection and adjustment of parameters for all other adjustable device functions according to the following method:

a) Adjusting numeric parameters

After selecting the function to be adjusted with the <SELECT>, <SAVE> or <RCL> key, the current numeric

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value for the selected parameter appears at the display. This value can be increased <> or decreased <> within predefined limits with the parameter adjusting keys. Pressing the key briefly results in a single step, and if the key is pressed and held the value is advanced through a series of consecutive steps. The setpoint value is changed simultaneously along with the display value.

b) Selecting text parameters (setting alternatives)

After selecting the function to be adjusted with the <FUNCTION> key, the current parameter status appears at the display in text format. Any of the alternative settings can be selected by repeatedly pressing the <> or the <> key. The parameter blinks at first to indicate that the displayed alternative has not yet become effective. The selected parameter value does not become effective until it is acknowledged with the <ENTER> key. If acknowledgement does not ensue, the device function is exited and the respective setting remains unchanged.

c) Browsing through the SEQUENCE register

 chapter 4.11 RCL and chapter 4.8 SELECT

[17] Protective functions status display

These indicators provide information concerning the setting status (yellow LED) or triggering (red LED) of protective functions. Illumination of the respective LEDs has the following significance:

OVP (overvoltage protection)

Overvoltage protection has been triggered, because output voltage has exceeded the selected trigger value (OVSET). The output is deactivated. Causes: – Voltage setpoint USET has been set too high manually, or

as a result of memory recall, programming error or Uset control signal to the analog interface

– Voltage transients caused, for example, by switching

inductive power consumers (perhaps too little difference between selected USET and OVSET values)

– During auto-sensing: Sensing lead polarity is reversed, or

an output lead is/was interrupted or was not taken into consideration when adjusting OVSET, so that the voltage at the output terminals which is relevant for the OVP function is increased by the amount to be compensated for at both leads, and is higher than USET voltage as controlled by the sensors at the load side (too little difference between selected USET and OVSET values).

– Unipolar power recovery from the connected power

consumer (e.g. DC motor)

– A device error or defect has occurred.

After the cause of triggering has been eliminated, the output can be reactivated with the OUTPUT ON command.

As long as the latter has no occurred, the output can be reactivated after an adequate cool-down period. If the POWER-ON function has been set to “RCL”, the output is reactivated automatically.

urrent protection)

OCP (over

Overcurrent protection has been triggered because the output has been operated in the current limiting mode (current control) for a duration greater than the DELAY value with activated OCP ON function. Causes:  page 26 and page 68 The output can be reactivated with the OUTPUT ON command.

OCP ON

Overcurrent shutdown is enabled.  page 26 and page 68

LOCAL LOCKED

The front panel controls are disabled, and are thus protected against unauthorized or inadvertent adjustment. This display only applies to disabling of the front panel controls by means of manual adjustment or a control signal applied to the TRIGGER input (for T_MODE TRG). It does not indicate disabling of manual switching to local control by means of the IEC bus LOCAL LOCKOUT command.

[18] Function selector key <FUNCTION>

No special key is assigned to device functions which are normally seldom adjusted or used. These functions are set in a menu-driven fashion by means of the following procedure:

1. Select the desired device function

with the <FUNCTION> key: – Scroll forward: <FUNCTION> + <> or

<FUNCTION> alone

– Scroll back: <FUNCTION> + <>

 Left display: Device function code  Right display: Currently selected parameter setting

or saved measured value

2. Select the desired function parameter

by (repeatedly) activating the <> or the <> key ([16]).  Left display: Unchanged  Right display: For adjusting the selected function

parameter (blinking indicates that adjustment has not yet been executed)

OTP (overtemperature protection)

Overtemperature protection has been triggered because the device has overheated. The output is deactivated.

Causes:

– Impaired cooling, e.g. air inlet or exhaust vents are

obstructed.

– Excessive ambient temperature The device is capable of

continuously supplying nominal power at ambient temperatures of up to 50° C (measured at the air inlet vents). Approximately 120 to 130% nominal power can be drawn intermittently (triggering point for electronic power limiting). Continuous operation at these levels may cause

triggering of the overtemperature protection function. – One or more fans have failed. – Output “fluctuates”. In the case of complex loads, control

fluctuations may occur ( chapter 5.2) which result in

increased power loss and thus causes overheating. – A device error or defect has occurred.

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3. Acknowledge and execute the selected setting

by pressing the <ENTER> key.  Both displays return to default values Uout and Iout.

If the rotary knobs or other function keys are activated, the function menu is exited and settings remain unchanged. Exceptions: <OUTPUT> is autonomously active. <RESOL> remains active for numeric parameters, and is otherwise inactive. Function parameters which do not blink in their entirety are accepted without acknowledging with <ENTER>.

The last open menu appears when the functions menu is reopened.

[19] Resolution selection key <RESOL>

This key can be used to vary step size (setting resolution) for device functions with numeric parameter settings, whose displayed values can be increased or decreased with the rotary knobs, or the <> and <> keys. The decimal place to be increased or decreased blinks. Blinking can be positioned at any one of the three lowest (right-most) decimal places by repeatedly pressing the <RESOL> key, thus allowing for the selection of fine, medium or coarse setting resolution. A different resolution can be selected for the left and righthand displays, and settings remain valid until a new resolution is selected, or until the device configuration is reset. Manual resolution adjustment after reset (*RST): fine (right-most decimal place)

[20] Save key <SAVE> and [21] Recall key <RCL>

The memory function is controlled with these two keys ( chapter 4.11 and page 62).

[22] <ENTER> key

The parameter value selected for a given device function setting is acknowledged and executed by pressing this key.

[23] <CE/LOCAL> key

This key has several functions:

1. Abort an operation

If the <CE/LOCAL> key is activated while a device function is displayed for adjustment, the display returns to its default value and no change is made to the selected device setting.

2. Switch from remote to local control If the device is being remote controlled via one of the computer interfaces (REMOTE LED illuminated), all of the control panel elements are disabled except for the mains switch and the <CE/LOCAL> key. The device can be returned to manual operation and the control panel elements can once again be enabled by pressing the <CE/LOCAL> key ( REMOTE LED off), without causing any changes to current device settings. If the device is being controlled via the IEC bus, the <CE/LOCAL> key can be disabled with the LOCAL LOCKOUT command, making key-operated return to manual mode operation impossible.

3. RST – reset device settings (RESET)

The reset command is triggered by pressing and holding the <CE/LOCAL> key and simultaneously activating the <ENTER> key. This command returns most device functions to their predefined default settings. Default settings are described in chapter 4.16 and on page 62.

4. Disabling front panel controls

By pressing and holding the <CE/LOCAL> key and simultaneously activating the <RCL> key, all control panel elements are disabled except for the mains switch and the <CE/LOCAL> key, and the LOCAL LOCKED LED lights up. Disabling front panel controls prevents unauthorized or inadvertent adjustment of device settings. In order to reactivate the controls, the <CE/LOCAL> key must be pressed and held for at least 4 seconds ( LOCAL LOCKED LED off). The <CE/LOCAL> key can also be disabled by applying a signal to the TRIGGER input at the

analog interface selecting the appropriate setting for the T_MODE function, thus preventing manual reactivation of the front panel controls.

[24] READY indicator

Indication of ready for operation: – LED on: The device is ready for operation and the controls

are enabled.

– Blinking LED: The device is performing a self-test and

cannot be operated at the moment, or the SEQUENCE mode is active ( page 36 and page 71).

– LED off: The device is not ready for operation.

[25] Interface status displays: REMOTE, ADDR and SRQ

Indication of computer interface operating status: – REMOTE LED on: Device is being remote controlled, front

panel controls are disabled.

– ADDR LED on: The device has been addressed and is

receiving or transmitting data (applies to IEC bus operation only).

– SRQ LED on: The device is transmitting a service request

(applies to IEC bus operation only).

[26] Device serial plate

For identification of the device Contains particulars regarding the manufacturer, device type, type designation, order number, serial number, hardware revision level and power consumption.

[27] IEC 625 bus interface

For remote control of device functions via the IEC 625 bus (= IEEE 488 bus) ( chapter 2.1.5).

Caution! The electrical contacts of this interface are connected to components which may be damaged by electrostatic discharge. Ground yourself by grasping the housing before touching these contacts!

[28] — [29] — [30] RS 232C interface

For controlling device functions via the RS 232C serial port ( chapter 2.1.5).

Caution! The electrical contacts of this interface are connected to components which may be damaged by electrostatic discharge. Ground yourself by grasping the housing before touching these contacts!

[31] Ground terminal

The output or cable shields can be grounded here if shielded output cables or control cables for the analog interface are used. The ground terminal is connected to the housing and the earthing contact at the mains connection.

and

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[32] Analog interface

The analog interface facilitates the following functions: – Remote adjustment of output voltage and current with

analog control voltages ranging from 0 to 5 V ( chapter

5.3 / chapter 5.4)

– External measurement or recording of output voltage and

current based on monitor signals 0 to 10 V ( chapter 5.5 / chapter 5.6)

– Connection of sensing leads for the compensation of

voltage drops within the output leads ( chapter 5.2)

– Linking of several devices for master-slave operation

( chapter 5.8 / chapter 5.9)

– Varying internal output resistance ( chapter 5.10) – Control of a selected device function via the floating

TRIGGER input ( chapter 5.7)

Caution! The electrical contacts of this interface are connected to components which may be damaged by electrostatic discharge. Ground yourself by grasping the housing before touching these contacts!

[33] Power output +/–

Terminals for connecting the power consumer This is a floating output and can be grounded with the positive or the negative pole. A detailed functional description of the output and possible connection options is included in chapter 5. The outputs of all device models are classified as “safety low-voltage circuits” (SELV) by the specified electrical safety regulations (voltage in the event of error: < 120 V–). However, contact protection measures are required for the outputs of the 80 V models. The output should always be deactivated before connecting consumers in order to prevent sparking and induced voltage transients.

[34] Air vents

Exhaust vents for the integrated fan In order to assure adequate device cooling, exhaust vents may not be obstructed. The fan(s) is/are equipped with a 2-step temperature controller.

[35] Mains connection

Connection for mains supply power.

[36] Line fuse(s)

Fusing for mains supply power

[37] Fuse ratings

WARNING! Only fuses of the type and nominal current rating specified here may be used when replacing blown fuses. Tampering with fuses or fuse holders is prohibited (“repairing” fuses, short-circuiting fuse holders etc.).

[38] Power cable strain relief

(for series 64 N only)

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4 Manual Operation and Device Functions

Uout / V Uset / V Ulim / V OVset / V Pout / W

SELECT

Uset Iset

Iout / A Iset / A Ilim / A DELAY / s Pout / W

SELECT





OUTPUT

Uset / V

Ulim

(1)

(2)

(3)

Important menu functions can be selected directly with the <SELECT> keys.

4.1 Menu Structure

After the power-up sequence has been completed, the device is switched to the basic operating mode – indicated by the illuminated READY LED – by means of which the device’s basic functions can be executed, such as:

• Select desired output voltage Uset

• Select desired output current Iset

• Adjust allowable working range with soft-limits Ulim and Ilim

• Adjust overvoltage and overcurrent protection

Additional setup menus can be accessed with the function key. These include:

• SEt (setup) Extended setup functions

• AnIF (analog interface) Analog interface settings

• SEq (sequence function) Sequence function settings

• bUS (computer interface) Interface configuration settings

After selecting the desired setup menu with the function key, the respective menu level appears at the display.

The function and arrow keys are used to scroll through the respective menu levels and select the desired settings.

The CE/Local key can be used to shift back up one level at a time, until the basic operating menu once again appears.

4.2 Setting Output Voltage Uset and Output Current Iset

There are two ways to set output voltage and output current:

• Direct selection

• Pre-selected settings

Changes become immediately effective when this method is utilized, assuming the output is active.

Output voltage or current is preset with the arrow keys to the desired value. The selected value is activated at the output after acknowledging with the ENTER key.

Uout

Uset/V

Ulim/

OVset

Pout

4.2.1 Direct Selection (rotary knobs and arrow keys)

The operating concept allows for direct selection of output voltage and/or output current with the rotary knobs, with immediate activation of the new values at the output.

In the default configuration, momentary output values appear at the display with voltage at the left and current at the right-hand side. This is indicated by means of the two LEDs to the right of the display. If the output is active (indicated by illumination of the red LED above the OUTPUT key), the LEDs in the diagram indicate the control mode. Depending upon the selected output quantities and the load situation, either output voltage or output current is regulated. CV (constant voltage) stands for voltage regulation, and CC (constant current) stands for current regulation.

If the working point is not within the allowable control range, the power LED lights up.

The display can be switched to a representation of the

Iout/A

Iset/A

Ilim/A

Delay/s

Pout/

corresponding setpoint by slightly turning one of the rotary knobs (Uset or Iset). This change is indicated by the respective LED to the right of the display. The blinking decimal place indicates the resolution with which adjustment will take place. Resolution can be changed with the RESOL key.

The setting can then be changed to the desired value with the rotary knob.

As soon as the selected setpoints have been activated, they can also be adjusted with the arrow keys, in which case resolution can also be pre-selected.

The setting mode can also be accessed with the SELECT key. The LEDs next to the display indicate the selected function.

Initializing the Procedure ☞ Slightly turn (1) the Uset knob (see Figure 4.2.1 a).

! The display is switched from Uout (measured voltage value) to

Uset (voltage setpoint). The decimal place for the selected setting resolution blinks.

The

green Uout/V LED

goes out, and the

yellow Uset/V LED

lights up.

Selecting a Resolution

! 3 step widths are possible: 0.01 V, 0.1 V or 1 V. !

The

blinking decimal place

indicates which

step width

will be used for

setpoint adjustment.

☞ Repeatedly press the <RESOL> key [19] until the desired

decimal place blinks at the display.

Executing the Procedure

! Values become immediately active during adjustment.

☞ Adjustment (2) with the Uset rotary knob (see Figure 4.2.1 a):

Clockwise rotation  Increases the value Counterclockwise rotation  Decreases the value All intermediate values are run through semi-linearly, and are read out to the output (assuming it is active).

Figure 4.2.1 a Continuous Adjustment of Uset

☞ Adjust (3) with the <> or the <> key:

<> (increment)  Increases the value <> (decrement) Decreases the value

! Each time the key is pressed, output voltage is changed by an

amount which corresponds to the value selected with the resolution setting function.

! Pressing and holding the respective key results in rapid

scrolling, regardless of the step width.

Attention! Uset may not be set to a value which exceeds Ulim!

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Uset – Selecting a Setpoint for Output Voltage

Iset / A

Ilim

(1)

(2)

(3)

Uset / V

ENTERENTER

ENTER

Uout Iout

Select Uset

Uout unchanged!

CE/LOCAL

Uout Iout

Iout unchanged!

Activate

Select Iset

Uset

Function

• Adjustment with the Uset rotary knob [8] is not enabled until 0.4 seconds after the digital display [9] has been switched to the respective function. This delay time prevents inadvertent changes to Uset during selection of the Uset display. The rotary knob must be adjusted after this time period has elapsed in order to change the Uset setting.

• After delay time has elapsed, output voltage is adjusted directly as the knob is rotated if the output is active. The currently active setpoint appears continuously at the display [9].

• If no adjustment is made for a period of 10 seconds, the display automatically returns to measured voltage value Uout. The display can be immediately switched to the Uout value by pressing the <CE/LOCAL> key.

• There are two ways to adjust Uset manually: – Adjustment with immediate activation of the new value:

Adjustment of the setpoint has an immediate effect on load output quantities.

– Setpoint adjustment:

Adjustment of the setpoint does not effect load output quantities until after activation.

Iset – Selecting a Setpoint for Output Current

The procedure for selecting output current Iset is identical to the procedure for selecting output voltage Uset (page 22).

However, the following controls and displays must be substituted:

• Iset rotary knob (chapter 3 [12])

• Right-hand display (chapter 3 [13])

• Yellow Iset/A LED (chapter 3 [14])

• Setting resolution: 3 step widths are possible: 0.01 A, 0.1 A or 1 A.

Attention: Iset may not be set to a value which exceeds Ilim!

Pre-selecting a Setpoint

☞ Press the <ENTER> key [15].

! The display [5] is switched from Uout (measured voltage value)

to Uset (voltage setpoint). The decimal place which corresponds to the selected resolution setting blinks.

! The green Uout/V LED goes out, and the yellow Uset/V LED [6]

lights up (as long as the Uset/V LED is continuously illuminated, direct adjustment with immediate activation of the new value can be executed with the rotary knob [7]).

• Setting resolution:

! 3 step widths are possible: 0.01 V, 0.1 V or 1 V.

☞ Repeatedly press the <SELECT> key [13] until the desired

decimal place (step width) blinks at the display.

• Output Voltage:

☞ Press either the <> key or the <> key [11]!

<> (increment)  Increases the value <> (decrement)  Decreases the value

! The yellow Uset/V LED [5] blinks. This indicates that new

values are displayed but not activated during adjustment. The old Uset value remains active.

☞ Press the <> key or the <> key [11] until the desired

value appears at the display [5].

! Each time the key is pressed, the pre-selected setpoint

value is changed by an amount which corresponds to the value selected with the resolution setting function.

! Pressing and holding the respective key results in rapid

scrolling, regardless of the step width.

☞ Acknowledge the selected value with the <ENTER> key

[15]. The new value is now activated at the output [4], and the yellow Uset/V LED [6] is continuously illuminated.

☞ Repeatedly press the <ENTER> key [15] in order to switch

back and forth between Uset and Iset.

Figure 4.2.2 a Adjusting Uset with a Specified Fixed Value

Figure 4.2.1 b Continuous Adjustment of Uset

4.2.2 Pre-selected Setting (ENTER, arrow keys)

• Output voltage jumps from the old value to the new value in a single step (no intermediate values).

Attention: Uset may not be set to a value which exceeds Ulim! If the application requires that switching to a new setpoint takes place in a single jump by pressing a key (without semi-continuous adjustment), this can be accomplished as follows.

Proceed to the basic setting menu using the CE/LOCAL key, i.e. to the display of momentary output values. Press the ENTER key in order to switch to the pre-selection setting mode. After switching to this mode, the currently valid setpoint values appear at both displays (indicated by the LED to the right of the display).

As a default function, voltage adjustment is always activated first, which is indicated by a blinking decimal place at the corresponding display. Repeatedly press the ENTER key in order to switch back and forth between current adjustment and voltage adjustment.

The new setpoint can be selected with the arrow keys (and only with the arrow keys), after selecting voltage or current setpoint adjustment and the desired resolution. The SET LED blinks in order to indicate that a change has been made but not yet activated. The new setpoint is activated after acknowledging with the ENTER key.

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4.3 Switching the Power Output On and Off

4.4 Limiting the Allowable Working Range: Ulim, Ilim

The <OUTPUT> key [7] (chapter 3 ) functions independently of the current operating state of the KONSTANTER.

Further details regarding how the device reacts when the <OUTPUT> key [7] is activated are included in chapter 3.

Closed Loop Control Mode

The power output can be activated or deactivated by pressing the <OUTPUT> key [7].

OUTPUT OFF  OUTPUT ON

REMOTE status (remote control)

(chapter 3 [25], page 69)

The <OUTPUT> key is disabled and has no function.

LOCAL LOCKED status (front panel controls disabled)

(chapter 3 [17], chapter 4.12)

The <OUTPUT> key is disabled and has no function.

trG out (T_MODE OUT) and External Trigger Active

The output can be activated and deactivated with the trigger signal (trG parameter OUT selected).

If the power output has been disabled by applying an external trigger signal to the analog interface, it cannot be switched on, neither by means of a command nor with the keys. The corresponding command is not executed, and bit 4 in event register B is set (output-on error). “Err 25” also appears briefly at the display as a warning in the event of manual operation.

The status of the power output the red LED above the <OUTPUT> key:

LED on = output activated LED off = output deactivated

In the case of OUTPUT OFF, the control mode displays are also switched off (chapter 3 [6]).

If the output has be deactivated as a result of overtemperature protection, the red OTP LED [17] in the control mode display lights up. The output cannot be activated until the KONSTANTER has returned to its normal operating temperature.

If the Pon RCL function is active, the output is automatically reactivated after the device has returned to its normal operating temperature.

Functions which may influence the status of the output include:

Functions Meaning Manual

OVP (OVSEt) Overvoltage

protection

OCP Overcurrent

protection

Pon (POWER_ON) page 27 page 70 SEq Sequence chapter

trG (T_MODE) page 29 page 74

(chapter 3 [33]) is indicated by

Remote

Operation

page 24 page 69

page 26 page 68

4.7.3

Operation

page 71

Allowable setting ranges for voltage and current can be limited in order to assure ideal matching to the working ranges of the connected power consumer. The Ulim and Ilim setting functions are provided to this end. Setting options can be selected with the respective <SELECT> key. Setting resolution is selected with the <RESOL> key. The setting itself is entered with the arrow keys. New settings become immediately active.

Attention!

These settings represent so-called soft limits. This means that values which lie within these limits can be selected both manually and via the computer interface, and that a corresponding error message is otherwise generated.

Attention!

The actual output quantity is the sum of the digitally selected setpoint value and the setpoint value specified via the analog interface. This makes it possible to select values which exceed the specified soft limit.

Ulim – Setting the Upper Voltage Limit Value

Function

• Upper setting limit (soft limit) for Uset

• Prevents inadvertent violation of the maximum voltage value when adjusting Uset.

• Protection for the connected power consumer

• Ulim has higher priority than Uset.

• Manual and computer-aided settings for Uset may not exceed Ulim.

• Ulim cannot be set to a value which is less than a previously selected Uset value. Uset must be reduced far enough to allow for the new Ulim setting.

Settings

The setting procedure is described in chapter 4.8.1.

Ilim – Setting the Upper Current Limit Value

Function

• Upper setting limit (soft limit) for Iset

• Prevents inadvertent violation of the maximum current value when adjusting Iset.

• Protection for the connected power consumer

• Ilim has higher priority than Iset.

• Manual and computer-aided settings for Iset may not exceed Ilim.

• Ilim cannot be set to a value which is less than current setpoint Iset. Iset must be reduced far enough to allow for the new Ilim setting.

Settings

The setting procedure is described in chapter 4.8.1.

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4.5 Description of OVP and OCP Protection Functions

Protection for the connected power consumer and the KONSTANTER by means of the following functions:

OVP – overvoltage protection

Function

•

Protection

• If voltage at the output terminals exceeds the selected value, the power output is deactivated.

• Triggering of overvoltage protection causes immediate (< 200



transmitter is disabled, and the electronic sink for discharging the output capacitors over a period of approximately 350 ms is activated. In addition, bit 4 (OVPA) is set in event register A. Bit 4 remains set in status register A for as long as the trigger value is exceeded.

•The triggered (see also chapter 3 [17]), and the out.

• As soon as the shutdown condition no longer exists, the power output can be reactivated by pressing the transmitting a

computer control

Settings

The setting procedure is described in chapter 4.8.1.

Note

•The that the desired undesired triggering of the overshooting due to sudden output discharging (minimum values: chapter 1.5.3)!

•The value between the output terminals of the SSP. This voltage is increased by the (remote sensing) by an amount equal to voltage drop at the output leads. For this reason, the above defined difference between during sensing mode operation.

• The triggering threshold for overvoltage protection is identical to the displayed value, and is always active!

• Overvoltage protection response time is less than 200 µs. Output voltage generated by the device may exceed the duration of this response time. Maximum overshooting can be approximately calculated as follows: Uout = ISET [A] x 200 [µs] / Cout [µF] ISET = selected current setpoint Cout = capacitance of the output capacitor Subsequent discharging time for the output capacitor depends upon load, and corresponds to the specified values for response time at Unom —>1 Volt included in chapter 1.5.3.

• Possible causes for triggering overvoltage protection are listed in chapter 3 [17].

OCP – Overcurrent Protection

Functions

•

Protects

• Deactivates the power output when load current reached, and the output is switched to the

mode

• Current can nevertheless be allowed to exceed Iset for specified, short periods of time by specifying a delay time (see below), for example:

! ! !

for the connected power consumer

OVSET

s) deactivation of the output (

OVP

LED lights up as soon as overvoltage protection is

trigger signal

(“

OUTPUT ON” ➩ red

OVP

trigger value (OVSET) should be set at least 1 V higher

USET

output voltage in order to prevent

OVP

trigger value makes reference to the prevailing voltage

USET

parameter during sensing mode operation

OVSET

and

USET

the power consumer from continuous overcurrent.

Starting current for electric motors In-rush current for capacitive power consumers For testing the breaking performance of circuit breakers, motor protecting switches, fuses etc. For determining the short-term load capacity of contacts and cables, as well as electrical and electronic components

OUTPUT OFF

to the analog interface or by means of

OVP

function resulting from

must be correspondingly increased

). The HF power

red OUTPUT

<OUTPUT> key,

OUTPUT

LED lights up).

current regulating

LED goes

OVSET

Iset

has been

for

In order to maintain short response times when programming voltage increases

•The red chapter 3 [17]), and the

• The power output can be reactivated at any time by pressing the

<OUTPUT> key,

interface

OUTPUT

OCP

LED lights up as soon as

red OUTPUT

by transmitting a

or by means of

LED lights up).

computer control (OUTPUT ON ➩ red

OCP

is triggered (see also

LED goes out.

trigger signal

to the analog

Settings

See description on page 26.

DELAY – Output Off Delay for OCP

Functions

• Delay time prior to deactivation of the power output after triggering of current regulating (

• Only enabled with activated

• If output current the shutdown sequence is aborted.

• If current regulation is triggered again, the routine is started once again (at 00.00).

• The default setting after

Iout

drops below

Iout = Iset)

OCP

function (

Iset

RESET (*RST

OCP ON

before

) is 00.00.

)

DELAY

time elapses,

Settings

The setting procedure is described in chapter 4.8.1.

4.6 Display of Momentary Output Values Uout, Iout and

Pout

Uout – Display Momentary Measured Voltage Value

• Appears at the

•The

• The measured voltage value is automatically displayed again

• The momentary measured voltage value is displayed

green Uout/V

momentary measured voltage value.

approximately 10 seconds after the last setting has been made.

immediately if the user exits the device functions setting mode by pressing the

Iout – Display Momentary Measured Current Value

• Appears at the

• The green momentary measured current value.

• The measured current value is automatically displayed again approximately 10 seconds after the last setting has been made.

• The momentary measured current value is displayed immediately if the user exits the device functions setting mode by pressing the

Pout – Display Momentary Output Power

Repeatedly press the until the respective Pout LED lights up. Momentary output power, based upon measured Uout and Iout values, appears at the corresponding display ([9] or [13]).

– Display Measured Values in U/I Min-Max Memory

Functions

• Reads out stored values for display, or via the computer interface.

• Stored Min-Max values can be read out regardless of the status selected for the

Settings

See description on page 28.

left-hand display

LED [10] lights up and indicates display of the

right-hand display

Iout/A

LED [14] lights up and indicates display of the

MINMAX

[9]

key [23].

[13]

key [23]

function.



key [11] or the

Umin, Umax, Imin

and

Imax

key [15]

at the

24 GMC-I Messtechnik GmbH

Page 25

4.7 Operating Menu via the FUNCTION Key

FUNCTION

ENTER

FUNCTION

Jump to last edited function group

Jump to last edited function

e.g.

CE/LOCAL

FUNCTION

The FUNCTION menu consists of the following functions for configuring the KONSTANTER’s parameters:

Function group Function Parameter (numeric / text)

■ Setup

SEt OCP TP: oFF / on

Pon TP: rSt / SbY / rcL



rnd TP: 0 / -1 / -2

■ Analog Interface

AnIF trG TP: oFF / out / rcL / SEq / LLO / UI

■ Sequence Function

SEq* tSEt NP: xx.xx

tdEF NP: xx.xx Strt NP: xxx (11 ... 252) StoP NP: xxx (12... 253) reP NP: xxx (cont. or 1 ... 255) SEq** TP: Go, Strt, StoP, hold, StEP, cont.

* Sequence function: appears at left-hand display, right-hand display is blank. ** Parameter selection for sequence control: appears at left-hand display, selected parameter

appears at right-hand display.

TP: oFF / on / rSt



Figure 4.7 a Accessing the Functions Submenu

☞ If the function group menu is currently open, you can access

the following function groups:

■ Interface Configuration

bUS Addr NP: 0 / 1 / ... / 13 /... / 30 / (UNL)

bAUd NP: 50 / 75 / 150 / 200 / ... / 4800 /

9600 / 19200 dbit NP: 7 / 8 Pbit TP: nonE / ZEro / EVEn / odd / onE Sbit NP: 1 / 2

NP: Numeric Parameters

• Can be selected as a specified value or as a value within an interval with corresponding resolution.

•Adjust resolution (decimal place) by pressing the <RESOL> key.

• Select the value with the <> key or the <> key.

• Displayed value = selected value.

TP: Text Parameters

• Select parameters with the <> key or the <> key.

• Acknowledge your selection by pressing the <ENTER> key.

Settings

☞ Press the <FUNCTION> key at the front of the KONSTANTER.

If no settings have yet been changed via the FUNCTION menu after switching the device on, the SEt function group is accessed by pressing the <FUNCTION> key.

If settings have already been changed in the function menu, the last edited function group or function is accessed automatically.

• Accessing the last edited function:

☞ If you want to configure a function included in the current

function group, select the function group by pressing the <FUNCTION> key. Detailed information is included in the respective section of this chapter.

If you want to configure a function from another function group, first

☞

return to the

function group menu

• Exit the function menu completely: ☞ Press the <CE/LOCAL> key once again.

! Device is returned to Uout / Iout display.

by pressing the

key.

☞ If the desired function group does not appear immediately at

the left-hand display, repeatedly press the <FUNCTION> key until the name of the desired function group appears at the left-hand display (SEt in this example).

•

Forward scrolling

through function groups in this menu:

☞ Repeatedly press the <FUNCTION> key or ☞ Press and hold the <FUNCTION> key and repeatedly press the

<> key at the same time.

• Reverse scrolling through function groups in this menu: ☞ Press and hold the <FUNCTION> key and repeatedly press the

<> key at the same time.

•

Accessing functions in the selected function group:

☞ Press the <ENTER> key.

Figure 4.7 b Switching Amongst Individual Function Groups

Note

The order in which the commands are explained in the following sections corresponds to the actual sequence for manual operation of the SSP KONSTANTER. This makes it easy to configure device functions and parameters without leafing back and forth through the instructions!

GMC-I Messtechnik GmbH 25

Page 26

4.7.1 SET – “Setup” Function Group

FUNCTION

FUNCTION Press once

ENTER

Press repeatedly if necessary

Jump to last edited setup function

Start-up performance after power on

CE/LOCAL

Uout

Iout

Display of measured values

Select the text parameter from an options loop

From the SEt function group

ENTER

Activate

the setting

CE/LOCAL

FUNCTION SAVE

RCL

Uset/Iset FUNCTION

SAVE

RCL

FUNCTION

Abort

without change

OCP – Activate Overcurrent Protection

Functions

See functions description on page 24.

Setting Parameters

☞ OFF (default setting after RESET (*RST))

OCP function inactive

Continuous current limiting (current regulation)

☞ ON

OCP function activated

The output is deactivated as soon as current limiting has been active for the specified DELAY time.

Settings

☞ The procedure for configuring OCP is described in principle in

chapter 4.7 and in Figure 4.7.1 a.

! However, the OCP display and a

related text parameter appear in the setup function window.

☞ The selected text parameter does

not become active until the <ENTER> key is pressed!

Figure 4.7.1 b Path to Selection of the OCP Text Parameter

Note

Load current for the output capacitor is also acquired by the current regulator, and is limited to a value of Iset  load. If the OCP function has been activated and ISET and DELAY have been set to low values, the output may even be deactivated if output voltage is increased. For this reason, DELAY must at first be set somewhat higher than the resulting output voltage response time.

Figure 4.7.1 a Path to Pon Settings and other setting options in the Set menu

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Page 27

Pon – Output Switching Status, Response After Power On

Select the text parameter from an options loop

From the SEt function group

ENTER

CE/LOCAL

FUNCTION SAVE

RCL

Uset/Iset FUNCTION

SAVE

RCL

FUNCTION

Activate

the setting

Abort

without change

Select the text parameter from an options loop

From the SEt function group

ENTER

CE/LOCAL

FUNCTION SAVE

RCL

Uset/Iset FUNCTION

SAVE

RCL

FUNCTION

Activate

the setting

Abort

without change

UI_ – Configure U/I Min-Max Measured Value Memory (MINMAX)

Functions

• Automatically determines KONSTANTER configuration after power on.

Setting Parameters:

☞ rSt (RESET): Factory default settings are utilized. ☞ SbY (STANDBY): Same settings as prior to shutdown, power

output remains inactive (OUTPUT OFF). Disabled front panel controls are re-enabled after power on. As from firmware version 3.006: Disabled front panel controls remain disabled after power on.

☞ rcl (RECALL): Same settings as prior to shutdown. Disabled

front panel controls remain disabled after power on.

Settings

☞ The procedure for configuring Pon is described in principle in

chapter 4.7 and in Figure 4.7.1 a.

! However, the Pon display and a related text parameter appear

in the setup function window.

Functions

• Save minimum and maximum measured voltage and current values.

• Reads out stored values for Umin, Umax, Imin and Imax at the display, or via the computer interface.

• The MINMAX function can be temporarily set to OFF, for example before deactivating the output when changing devices under test. Stored values are then no longer updated, nor are they automatically reset.

• Stored Min-Max values can be read out regardless of the status selected for the MINMAX function.

• Stored Min-Max values can always be reset with the

_ RST command.

• Stored Min-Max values can also be reset with the *RST command, or with the key combination <CE/LOCAL> + <ENTER> (= RESET).

• The status of the MINMAX function is also saved to SETUP memory by pressing the SAVE key.

•If the Pon function is set to SbY or rcl, the MINMAX function is activated upon power-up, but previously measured Min-Max values are lost when the KONSTANTER is switched off.

•The MINMAX function can also be controlled via the trigger input at the analog interface (see page 29).

Setting Parameters

☞ OFF: Storage of Min-Max values is deactivated. ☞ ON: Storage of Min-Max values is activated. ☞ RST: Contents in the Min-Max memory are reset or replaced

with momentary measured values:

Umin = Uout Umax = Uout Imin = Iout Imax = Iout

Figure 4.7.1 c Path to Selection of the Pon Text Parameter

Note

• The status of the Pon function is not saved as a device setting to SETUP memory with the <SAVE> key.

• The following settings are recommended, depending upon how the KONSTANTER is used:

! Pon rSt: use in computer controlled systems ! Pon SbY:common laboratory use ! Pon rcL:applications which must continue in an unchanged

fashion after power failures.

Settings

☞ The procedure for configuring UI_ is described in principle in

chapter 4.7 and in Figure 4.7.1 a.

! However, the UI_ display and a

related text parameter appear in the setup function window.

Default setting after

☞

RESET

RST

OFF!

GMC-I Messtechnik GmbH 27

Figure 4.7.1 d Path to Selection of the Pon Text Parameter

Page 28

UI_ – Display Measured Values in

CE/LOCAL

Uout

Iout

FUNCTION SAVE RCL

Abort

FUNCTION

ENTER

FUNCTION

Uset/Iset FUNCTION

SAVE

RCL

FUNCTION

Select the text parameter from an options loop

From the SEt function group

ENTER

CE/LOCAL

FUNCTION SAVE

RCL

Uset/Iset FUNCTION

SAVE

RCL

FUNCTION

Activate

the setting

Abort

without change

U/I Min-Max Memory

rnd – Rounding Off the Displayed Measured Value

Functions

• Reads out stored values for Umin, Umax, Imin and Imax at the display, or via the computer interface.

• Stored Min-Max values can be read out regardless of the status selected for the MINMAX function.

Settings

☞ Select from the Set menu with the <FUNCTION> key. ☞ After U

_, U , I_ or I is displayed for the first time, browsing

amongst these values is possible with the <> and <> keys.

! U_, U , I_ or I appears in the setup function display, and the

corresponding measured value appears at the left-hand display.

☞ Default setting after RESET (*RST): Measured value memory is

cleared!

Applications

The ROUND function can be used where fluctuating measured values are to be expected due to the application (e.g. in manufacturing), which may cause unnecessary concern.

Functions

The ROUND function defines how many decimal places will be displayed for measured Uout and Iout values.

Setting Parameters

☞ 0: no rounding ☞ –1: rounded off by one decimal place ☞ –2: rounded off by two decimal places

Settings

☞ The procedure for configuring Rnd is described in principle in

chapter 4.7 and in Figure 4.7.1 a.

! However, the rnd display and a

related text parameter appear in the setup function window.

Figure 4.7.1 e Path to Selection of the rnd Text Parameter

☞ Default setting after RESET (*RST): unchanged

28 GMC-I Messtechnik GmbH

Page 29

4.7.2 AnIF – “Analog Interface” Function Group

Select the text parameter from an options loop

From the AniF function group

ENTER

CE/LOCAL

FUNCTION SAVE

RCL

Uset/Iset FUNCTION

SAVE

RCL

FUNCTION

Activate

the setting

Abort

without change

The analog interface allows for remote control of the KONSTANTER. A floating digital control input with several selection functions (TRG IN+ / TRG IN-) is available in addition to analog setting options (chapter 5).

☞ LLO LOCAL LOCKED: Operation via front panel controls is

disabled.

TRIGGER Signal Influence on Front Panel Controls

Low All front panel controls are functional.

trG – Function Selection for Trigger Input

Functions

•

Floating

optocoupler input (

TRG IN

) at the analog interface

• The trigger input is controlled with a digital signal (low: 0 V, high: 4 ... 26 V).

• Response time is approximately 1 to 15 ms.

Setting Parameters

☞ OFF: Trigger input function is deactivated, signals at the

trigger input are ignored.

☞ OUT: Trigger input influences OUTPUT: output On / Off

TRIGGER Signal Influence on OUTPUT Status

Low Status depends upon manual setting or

programming command.

LOW _

HIGH OUTPUT is in the OFF state and cannot be

HIGH

☞ RCL: Memory recall from defined start to defined stop address

(step-by-step sequence control)

HIGH OUTPUT remains OFF or

OUTPUT is switched OFF.

switched on – neither manually nor with a programming command.

 _ LOW OUTPUT is activated,

Except in the event of OTP or OVP.

HIGH All front panel controls are disabled,

except for the mains switch, activation is not possible with the LOCAL key.

☞ UI_

Min-Max function: Storage of Min-Max values for U and I is

controlled by the trigger, Min-Max function active, (UI _

ON)

TRIGGER Signal Influence on Min-Max Status

LOW The Min-Max function is active.

LOW _

HIGH The Min-Max function is deactivated.

Values in the in Min-Max memories remain unchanged.

HIGH The Min-Max function is inactive.

_LOW Values in the Min-Max memories are reset

HIGH

and replaced with momentary output values. The Min-Max function is activated.

☞ The status of the trG function is not saved as a device setting

with the SAVE key.

Settings

☞ Procedure for configuring trG ➙ see also chapter 4.7 ☞ The trG display appears in the AnIF menu along with a related

text parameter.

☞ Default setting after RESET (*RST):

unchanged

TRIGGER Signal Influence on Step-by-Step Control

Edge

Start trigger signal

Low  High

HIGH • The trigger signal is a high pulse with a

duration of 11 to 800 ms.

• A high pulse with a duration > 1.0 s resets the address counter to the start address at any point in time, and execution begins with the next trigger signal.

Edge High  Low

The high  low edge of the (short) trigger signal results in step-by-step control of the currently selected sequence, regardless of the specified time and number of repetitions.

Recall of the memory’s contents begins with the START address. Each trigger

☞ SEQ: Control execution of the SEQUENCE function

signal increases the address by 1, until the STOP address is reached. The next pulse once again causes execution of the contents of the START address.

SEQUENCE: Sequential execution of specified values for Iset, Uset and dwell time (see also chapter 4.7.3). The SEQUENCE function group must be set to SEQUENCE ON for this function.

TRIGGER Signal Influence on SEQUENCE Status

LOW _

HIGH

The SEQUENCE function is started beginning with the start address,

SEQUENCE GO.

HIGH _ LOW Ends sequence execution by jumping to

the stop address.

Figure 4.7.2 Path to Selection of the trG Text Parameter

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4.7.3 SEq – The “Sequence” Function Group

U/V

4,5

t/ms

15 2000 20

Tset

Range of Memory Locations

111 253 255

SEQUENCE

Occupied Memory Locations

SEQUENCE

SEQ

SEQUENCE

Range of Memory Locations

111 253 255

Occupied Memory Locations

SEQUENCE

SEQ

Occup. Loc. Occup. Loc. Occup. Loc.

SEQUENCE

Description

Test sequences can be generated with the SEQUENCE function group (in accordance with DIN if desired). Setpoints are specified for voltage (Uset) and for current (Iset), as well as for the associated time intervals (tset) to this end.

Figure 4.7.3 Test Signal for Electrical System Simulation During Start-Up

Test sequences can be saved, and changed as required. The test sequence (SEQUENCE) automatically runs through all

specified values after it has been started, beginning with a specified start address, and ending with a specified stop address. The number of sequence repetitions can be selected. The sequence can be stopped at any time, and then resumed.

The sequence can also be run step-by-step (manual control), independent of programmed time intervals.

Functions

• Allows for automated, reproducible execution of a series of USEt, ISEt and tSEt values which have been stored to memory with the <SAVE> function.

Memory Occupancy

• A defined memory location (addresses 11 through 255) is assigned to a test step including specified setpoints USEt, ISEt and tSEt.

• A SEQUENCE consists of at least one test step.

• The entire range of memory locations for the sequence may only be occupied by a single sequence.

• Several smaller sequences may also be generated over the entire range of memory locations.

• New sequences can also be generated consisting of subsegments of occupied memory location ranges by selecting new start and stop addresses.

Responses to Sequence Start and Stop Commands

• The power output is automatically activated (OUTPUT ON) when the SEQUENCE function is initialized (automatic sequence run and step-by-step control).

• The power output can be controlled at all times with the OUTPUT function during execution of the sequence, and during pauses.

• Stopping the sequence has not effect on the contents of the sequence memory locations.

• The contents of the memory location with the StoP address are executed as the last function. The sequence can then be ended, or can be started over again at the start address, depending upon the number of repetitions and the contents of the stop address location.

• If the memory location assigned to the stop address contain setpoints (i.e. if it is not empty), the output remains active (OUTPUT ON) using the stop address setpoints after the sequence has been completed.

• If the memory location assigned to the stop address is empty, the output is deactivated automatically at this point in time (OUTPUT OFF).

• The fact that a sequence run is active can be determined by querying bit 7 SEQB (= SEQuence Busy) in condition register A (CRA). The end of the sequence is indicated by 7 SEQI in event register A (ERA).

Number of Repetitions and Remaining Repetitions Counter

• A sequence can be run 1 to 255 times, or indefinitely until it is stopped manually (see also page 33).

• If automatic sequence repetitions have been programmed, (rEP = 1 ... 255 or 0 = continuous), the pointer jumps directly to the “Strt” memory location after the contents of the “StoP” memory location have been executed, and the sequences is continued.

• When the sequence jumps from the stop to the start address during an automatic sequence run, the remaining repetitions counter is reduced by 1 (rrep = rrep - 1).

• When the sequence jumps from the stop to the start address during step-by-step control, the remaining repetitions counter is not reduced (rrep = rrep).

Response to Empty Memory Locations

• Empty memory locations at the beginning of a sequence are skipped. The first memory location with valid setpoints is executed.

• Empty memory locations may be included between the start and stop addresses, but these are skipped.

• Empty stop address: – rrep > 1: If a remaining number of repetitions has yet to be run, the empty memory location assigned to the stop address is skipped. The memory location assigned to the start address is then executed. – rrep = 1: After the last repetition has been run, the empty memory location assigned to the stopped address results in an OUTPUT OFF status.

30 GMC-I Messtechnik GmbH

Figure 4.7.3 a Range of Memory Locations and Sequence

Page 31

FSEt - memory location-specific voltage or current function

Select the text parameter from an options loop

ENTER

RESOL

Cursor position

Resolution of numeric parameter

From the SEq function group

CE/LOCAL

FUNCTION SAVE

RCL

Uset/Iset FUNCTION

SAVE

RCL

FUNCTION

Activate

the setting

Abort

without change

tSEt – Memory Location-Specific Dwell Time

Function

• This parameter determines which function is to be performed during the transition to this memory location..

• This command has been available as from firmware version

03.004.

Setting parameters

nF SEQUENCE values USET, ISET, TSET without addi-

tional function

rU Voltage ramp from the previous to the new voltage

setpoint value, duration TSET and/or TDEF

rI Current ramp from the previous to the new current

setpoint value, duration TSET and/or TDEF

Settings

☞ Procedure for selecting FSEt: see chapter 4.7 - Settings.

! The display of the SEq function shows the value for FSEt and

the associated alphanumerical parameter.

☞ Set the parameter with key <> or <> ☞ The parameter is accepted upon acknowledging with the

<ENTER> key.

☞ After selecting the value, jump to the next or the previous

sequence function by pressing the <FUNCTION> key, or by simultaneously pressing the <FUNCTION> key and the <> key or the <> key.

Functions

Special dwell time (see also Figure 4.7.3):

• For the voltage-current value pair at a specific memory location within a SEQUENCE

Setting Range

00.00 s The tdEF value is used.

00.01 s to 99.99 s Maximum resolution: 0.01 s

99.99 s Assignment of the specified time to several consecutive SEQUENCE memory locations with identical voltage and current values

☞ The values include rise time and decay time (see also Figure

4.7.3). Edge times are only assured within a limited load

impedance range (see also Technical Data).

Settings (see sequence settings and execution on page 35)

☞ Procedure for selecting tSEt: see also chapter 4.7 - Settings.

! The tSEt display appears in the window for the SEq function,

along with a related numeric parameter [s].

GMC-I Messtechnik GmbH 31

Figure 4.7.3 b Path to tSEt Settings

☞ Set resolution, i.e. the decimal place (cursor position) of the

numeric parameter by repeatedly pressing the <RESOL> key.

☞ Enter dwell time based on the previously entered resolution

value using the <> key or the <> key.

☞ After selecting the value, jump to the next or the previous

sequence function by pressing the <FUNCTION> key, or by simultaneously pressing the <FUNCTION> key and the <> key or the <> key.

☞ The last selected and displayed value for the numeric dwell

time parameter is used as a default setting.

Page 32

tdEF – Dwell Time Independent of Memory Location

Select the text parameter from an options loop

ENTER

RESOL

Cursor position

Resolution of numeric parameter

From the SEq function group

CE/LOCAL

FUNCTION SAVE

RCL

Uset/Iset FUNCTION

SAVE

RCL

FUNCTION

Activate

the setting

Abort

without change

Possible selections for the start address



From the SEq function group

Select the start address

FUNCTION

Strt – Sequence Start Address

Functions

• Default dwell time for all voltage-current value pairs included in a sequence to whose memory locations no special dwell time

has been assigned (tSEt = 00.00)

• tdEF is used primarily to speed up programming if the value for a certain dwell time is used repeatedly within a given

SEQUENCE.

Setting Range

0.01 s to 99.99 s Maximum resolution: 0.01 s

Settings (see sequence settings and execution on page 35)

☞ Do not enter tdEF until all Uset, Iset and tset values have been

assigned to all necessary memory locations!

☞ Procedure for selecting tdEF: see also chapter 4.7 - Settings.

! The tdEF display appears in the window for the SEq function,

along with a related numeric parameter [s].

Functions

• The beginning of a range within which memory locations or content will be deleted or added

•The SEQUENCE is always defined by means of a start address and a

stop address.

• The address of the memory location from which the SEQUENCE will start

• The start address can correspond to any memory location from 11 to 255.

•The start address is selected immediately prior to initially starting a new SEQUENCE.

•The last selected start address is always valid for any give

SEQUENCE, regardless of the point in time at which the SEQUENCE is started.

• The start address for a SEQUENCE change can be selected independent of the stop address.

! The contents of the memory location with the Strt address are

executed as the first function.

Setting Parameters

11 Lowest possible Strt address 255 Highest possible Strt address

Figure 4.7.3 c Path to tdEF Settings

☞ Set resolution, i.e. the decimal place (cursor position) of the

numeric parameter by repeatedly pressing the <RESOL> key.

☞ Enter dwell time based on the previously entered resolution

value using the <> key or the <> key.

☞ After selecting the value, jump to the next or the previous

! The last selected and displayed value for the numeric dwell

sequence function by pressing the <FUNCTION> key, or by simultaneously pressing the <FUNCTION> key and the <> key or the <> key.

time parameter is used as a default setting.

Settings (see sequence settings and execution on page 35)

☞ Procedure for selecting Strt: see also chapter 4.7 - Settings.

! The Strt display appears in the window for the SEq function,

along with a related numeric parameter.

Figure 4.7.3 d Path to Start Address Selection

☞ Select the desired memory location with the <> or the <>

key.

☞ After selecting the value, jump to the next or the previous

sequence function by pressing the <FUNCTION> key, or by simultaneously pressing the <FUNCTION> key and the <> key or the <> key.

! The last selected and displayed value for the Strt address is

used as a default setting.

32 GMC-I Messtechnik GmbH

Page 33

StoP – Sequence Stop Address

Possible selections for the stop address



From the SEq function group

Select the stop address

FUNCTION

From the SEq function group

Select a value for number of repetitions

FUNCTION

rEP – Sequence Repetitions

Functions

• The end of a range within which memory locations or content will be deleted or added

•The

SEQUENCE

is always

defined by means of a start address and a stop

address.

• Memory location at which a SEQUENCE will be ended

• The stop address can correspond to any memory location from 11 to 255.

•The stop address is selected immediately prior to initially starting a new SEQUENCE.

•The last selected stop address is always valid for any given

SEQUENCE, regardless of the point in time at which the SEQUENCE is started.

• The stop address for a SEQUENCE change can be selected independent of the start address.

! The contents of the memory location with the Stop address

are executed as the last function (reP 

Setting Parameters

11 Lowest possible Stop address 255 Highest possible Stop address

Functions

• Defines the number of SEQUENCE repetitions from the start address to the stop address.

•The SEQUENCE is run from the selected start address to the stop address. If repetitions have been programmed, the pointer automatically jumps from the stop address back to the start address, and the sequence is started over again.

•The rEP value is stored to SETUP memory as a device setting with the <SAVE> key.

Setting Parameters

cont Continuous repetition until the SEQUENCE is stopped

manually (page 36 and page 36) or by means of computer control (page 71)

1 ... 255 Number of possible repetitions

Settings (see sequence settings and execution on page 35)

☞ Procedure for selecting rEP: see also chapter 4.7 - Settings.

! The rEP display appears in the window for the SEq function,

along with a related numeric parameter [s].

Settings (see sequence settings and execution on page 35)

☞ Procedure for selecting StoP: see also chapter 4.7 - Settings.

! The StoP display appears in the window for the SEq function,

along with a related numeric parameter.

Figure 4.7.3 e Path to Stop Address Selection

☞

Select the memory location with the <> key or the <> key.

☞ After selecting the value, jump to the next or the previous

sequence function by pressing the <FUNCTION> key, or by simultaneously pressing the <FUNCTION> key and the <> key or the <> key.

! The last selected and displayed value for the numeric stop

address parameter is used as a default setting.

Figure 4.7.3.5 a Path to rEP Setting

☞ Select the desired number of repetitions with the <> key or

the <> key.

☞ After selecting the value, jump to the next or the previous

sequence function by pressing the <FUNCTION> key, or by simultaneously pressing the <FUNCTION> key and the <> key or the <> key.

! The last selected and displayed value for the numeric

parameter (number of repetitions) is used as a default setting.

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Page 34

SEq – Sequence Control

Select the text parameter from an options loop

From the SEq function group

ENTER

CE/LOCAL

FUNCTION SAVE

RCL

Uset/Iset FUNCTION

SAVE

RCL

FUNCTION

Activate

the setting

Abort

without change

Continue in the SEq function group

ENTER

FUNCTION

Jump to the start address or the

first address with valid contents

Step-by-step control

READY

Continue in the SEq function group

ENTER

FUNCTION

Sequence running

READY

Functions

• Controls automatic and step-by-step sequence runs.

Setting Parameters

☞ Strt: activate sequence control, jump to start address

(status: RDY  HOLD) Execute command with the <ENTER> key.

☞ GO: SEQUENCE begins at start address

(status: RDY  RUN) Execute command with the <ENTER> key.

Additional Setting Parameters with running or suspended sequence, and in step-by-step mode

☞ hold: SEQUENCE stops at current address

(status: RUN  HOLD) Execute command with the <ENTER> key.

☞ cont: SEQUENCE is resumed at next address

(status: HOLD  RUN) Execute command with the <ENTER> key.

☞ StEP: Execute next memory location

and activate step-by-step control, (status: HOLD  HOLD) Execute command with the <ENTER> key.

☞ StoP: SEQUENCE is stopped and jumps to stop address

(status: RUN  RDY or HOLD  RDY) Execute command with the <ENTER> key.

Figure 4.7.3 g Preparing for Step-by-Step Control

! The first valid memory location is now executed, and the

values saved to this location (Uset and Iset) are read out to the power output and the signal output. The READY LED blinks slowly .

Settings (see sequence settings and execution on page 35)

☞ Procedure for selecting SEq: see also chapter 4.7 - Settings.

! The SEq display appears in the window for the SEq function.

☞ Press the <ENTER> key in order to switch to the SEQUENCE

menu.

☞ Repeatedly press the <FUNCTION> key (max. 6 times) until the

SEq Go function appears.

Figure 4.7.3 h Preparing for Automatic SEQUENCE Control

! In this case, all memory locations are executed, one after the

other, from the start address to the stop address, and the respective values saved to each location (Uset, Iset and tdef/ tset) are read out to the power output and the signal output.

The READY LED blinks rapidly .

Note

Automatic and step-by-step sequence control (external

trigger or setting command) are not interlocked.

! After the SEQUENCE has been started, various error messages

may appear for a period of approximately 1 second (see also page 36 and the appendix).

! If an error occurs during execution of the SEQUENCE, bit 5

SEQE (SEQuence Error) is set in event register B (ERB).

Figure 4.7.3 f Selecting Automatic or Step-by-Step Sequence Control

☞ Acknowledge your selection with the <ENTER> key.

34 GMC-I Messtechnik GmbH

Page 35

ENTER

SAVE

– The start address must be entered. – The ENTER key then increases

FUNCTION

ENTER

FUNCTION

Function

Group Menu

Function

CE/LOCAL

FUNCTION

Repeatedly press the FUNCTION key until SEq appears at the left-hand display

Uset

Iset

FUNCTION

the address by 1 automatically.

13a

Display blinks

FUNCTION

Setting all Required Values for a Sequence

Read the detailed explanations included in chapter 4.6 and 4.7.3 first.

1 Press the <FUNCTION> key. 2The function group or function menu appears. 3 If the function menu is not displayed, press the <CE/LOCAL>

key in order to return to the function groups menu.

4 If the functions menu is displayed, repeatedly press the

<FUNCTION> key until SEq appears at the left-hand display (the right-hand display remains blank).

5 Press the <ENTER> key to access the SEQUENCE functions

menu. tSEt appears at the left-hand display.

6Adjust Uset and Iset with the rotary knob and/or the <> and

7 Select a tSEt value with the <> key or the <> key if

8 ... 9

10 Select the desired memory locations (between 11 and 255)

11 Press the <ENTER

12 Enter the next setting for Uset, Iset and tset , and continue

13 After saving the last step of the sequence loop (13a) with the

14 Enter a tdEF value if necessary, acknowledge by pressing the

15 Strt - Entry of a SEQUENCE start address is prompted. 16 Select a start address with the <> key or the <> key if

17 StoP - Entry of a SEQUENCE stop address is prompted. 18 Select a stop address with the <> key or the <> key if

19 20 Select the desired number of repetitions with the <> key or

21 SEq Go blinks at the displays, indicating that the SEQUENCE

22 Press the <ENTER> key. The sequence is run using the

GMC-I Messtechnik GmbH 35

<> keys if necessary.

The

[Uset and Iset values can be adjusted at any time, and assigned to a memory location by pressing the <SAVE> and <ENTER> keys.] display can be returned immediately to the previously edited function (in this case tSEt)

necessary, and continue by pressing the <FUNCTION> key.

with the <> key or the <> key.

by pressing the <FUNCTION> key.

Press the <

SAVE

> key. The memory location (

Sto

) is displayed.

> key. The setting is stored to the memory

location and the

memory address is automatically increased by 1.

until all values have been entered for the entire SEQUENCE. Use rotary knobs for Uset and Iset settings only. Press the <FUNCTION> key for tset settings.

<SAVE> and <ENTER> keys, press the <FUNCTION> key in order to continue to the tdEF setting.

<FUNCTION> key and/or jump to the next function.

necessary, acknowledge by pressing the <FUNCTION> key and/or jump to the next function.

rEP

- Entry of the number of

SEQUENCE

repetitions is prompted.

the <> key if necessary, acknowledge by pressing the <FUNCTION> key and/or jump to the next function.

can now be started.

selected values.

Jump from Uset / Iset settings to the last edited function, or from any given function to the next function by pressing the <FUNCTION> key.

Press the <FUNCTION> key and the <> key to jump back to the previous function.

The READY LED blinks to indicate that a sequence is running.

The example included here is only intended to demonstrate reliable sequence programming. You can use other procedures as well, which may be easier or faster for you.

Figure 4.7.3 i Setting all Required Values for a SEQUENCE

* From firmware version 03.004 onwards, start with selecting parameter FSEt by

pressing <> or <> and then acknowledge with <ENTER>

Page 36

Checking the Sequence

Functions

The following parameters can be checked at the display menu

while the SEQUENCE is running, or when it has been suspended:

> Pout = max. output power > rcl = address of the current memory location > rrEP = number of repetitions yet to be executed > USEt = momentary output voltage > ISEt = momentary output current > tSEt = execution time for the current address (tSEt or tdEF) no display of remaining time

Checking the Sequence with Manual Operation

☞ Press the <SELECT> key and browse through the display

menu.

☞ Further information is included in chapter 4.8.

Checking the Sequence with Remote Querying

The status of the sequence can be queried by means of remote command (see page 71).

Possible responses to text: “RUN”, “HOLD”, “RDY”

RUN: active sequence HOLD: sequence suspended RDY: device in initial state

Numeric value for number of repetitions yet to be executed (rrep) Numeric value for current memory address (rcl)

exited and the new memory address are not taken into consideration.

• The output retains its previous switching status (output On or Off).

• When jumping from the start address to the stop address or back again, the remaining repetitions counter (rrep) remains unchanged.

Procedure:

☞ With suspended SEQUENCE,

– press the <ENTER> key (next address), or – the <> key (next address)

the <> key (previous address) or

– press the <FUNCTION> key and then browse with the <> key, the <> key or the <FUNCTION> key

until SEq step appears and execute the command (next address) with the

<ENTER>

key.

! The SEQUENCE executes the next, or the previous address. ! If the sequence is in the HOLD status, the selected dwell time

is irrelevant.

! The READY LED blinks slowly in the HOLD status.

• Start automatic sequence run from the current memory location: see resuming the sequence from the HOLD status in the following chapter.

• Start automatic sequence run: see sequence restart in the following chapter.

Jump to the stop address: see ending the sequence at the stop

• address

in the following chapter.

• End step-by-step control at the current address: see ending the sequence at the current address in the following chapter.

Influencing Step-by-Step Control

Step-by-step control is used to test Uset and Iset setpoint values in a time-independent fashion before a sequence is run automatically. Step-by-step control is activated by executing the

SEQUENCE START command, or by initial execution of the SEQUENCE STEP command.

Executing the Start Address and Beginning Step-by-Step Control (status: HOLD  HOLD or RUN  HOLD)

Functions

! The start address can be selected at any time

suspended or a running address are executed. Selected dwell times of the exited and the new memory address are not taken into consideration.

SEQUENCE

. The setpoints saved to the start

from a

! The device is switched from automatic sequence to step-by-

step control the first time this step is executed.

• The output is switched to the On status.

Procedure:

☞ With suspended or running SEQUENCE,

– press the <FUNCTION> key and then browse with the <> key, the <> key or the <FUNCTION> key

until SEq start appears, and execute the command with the <ENTER> key.

! The SEQUENCE executes the start address. ! If the sequence is in the HOLD status, the selected dwell time

is irrelevant.

! The READY LED blinks slowly in the HOLD status.

Influencing the Automatic Sequence Run

Stop the sequence manually – end at stop address

(status: RUN RDY)

Functions

A SEQUENCE can be stopped (ready status) at any time while it

is running (run status), or when it has been suspended (hold status).

! The sequence jumps to the stop address when interrupted.

• If the memory location assigned to the stop address is empty, the Uset and Iset values from the last executed address are retained. If the memory location assigned to the stop address is not empty, Uset and Iset are changed to the corresponding values. Selected dwell time Tset of the last executed memory location is not taken into consideration.

! The output retains its switching status (output On or Off) if the

memory location assigned to the stop address is not empty. The output is switched to the off status if the memory location assigned to the stop address is empty.

Procedure:

☞ Press the <FUNCTION> key.

! SEq StoP blinks at the display.

☞ Press the <ENTER> key.

! The contents of the stop address are executed.

The sequence is ended.

Stopping The Sequence at the Current Address

(status: RUN



HOLD)

Executing the Next Address (status: HOLD HOLD)

Functions

! The next or the previous memory location can be selected at

any time from a suspended SEQUENCE – in the step-by-step control mode. The setpoints saved to the next or the previous memory location are executed. Selected dwell times of the

36 GMC-I Messtechnik GmbH

Functions

! A running SEQUENCE can be suspended for an indefinite period

of time.

• Uset and Iset retain the values specified in the current memory location. Selected dwell time Tset of the current memory location is not taken into consideration.

Page 37

• The output retains its switching status (output On or Off).

ENTER

SEQUENCE

Sequence is resumed

Resume sequence

Restart sequence

End sequence

Select:

The setting is executed

in hold status

READY

in run status

READY

Step-by-step, start address

Step-by-step, next address

FUNCTION

CE/LOCAL

End at

current address

•The SEQUENCE can be resumed (cont) at the next memory location, or ended at the current address <CE/LOCAL> or the stop address (stop) or restarted (go). In addition, step-by-step control can be started at the next

address (Step) or at the start address (Start) as well.

Procedure:

☞ With running SEQUENCE,

– press the <ENTER> key or – press the <FUNCTION> key and then browse with the <> key, the <> key or the <FUNCTION> key

until SEq hold appears and execute the command with the <ENTER> key.

! The SEQUENCE stops at the current address. ! The READY LED blinks slowly in the HOLD status.

Resuming the Sequence from the HOLD Status (status: HOLD RUN)

Functions

! A suspended SEQUENCE can be resumed at any time.

• The output retains its switching status (output On or Off). The selected dwell time of the exited memory location is not taken into consideration.

! The sequence is now resumed starting with the next address,

and the values stored to the respective memory location (Uset, Iset and tdef/tset) are read out to the power output.

! In the case of very long dwell times, you can advance

prematurely to the next memory location by pressing the <ENTER> key twice (status: RUN HOLD RUN).

Procedure:

☞ With suspended SEQUENCE,

– press the <ENTER> key or – press the <FUNCTION> key and then browse with the <> key, the <> key or the <FUNCTION> key

until SEq cont appears and execute the command with the <ENTER> key.

! The SEQUENCE is resumed starting with the next memory

location.

! The READY LED blinks rapidly in the Run status.

Ending the Sequence at the Current Address (status: HOLD RDY)

Functions

! A suspended SEQUENCE can be ended at the current address

at any time.

• Uset and Iset retain the values specified in the current memory location. Selected dwell time Tset of the current memory location is not taken into consideration.

• The output retains its switching status (output On or Off).

Procedure:

☞ With suspended SEQUENCE,

– press the <CE/LOCAL> key.

! The SEQUENCE is ended and the output status is determined

by the content of the current address.

! The READY LED does not blink in the RDY status.

Restarting the SEQUENCE (status: HOLD RUN or RUN RUN)

Functions

! A suspended or running SEQUENCE can be restarted at any

time.

• The output is switched to the output On status.

! In this case, all memory locations are executed, one after the

other, from the start address to the stop address, and the respective values saved to each location (Uset, Iset and tdef/

tset) are read out to the power output and the signal output.

Procedure:

☞ With interrupted or running SEQUENCE,

– press the <FUNCTION> key and then browse with the <> key, the <> key or the <FUNCTION> key

until SEq go appears and execute the command with the <ENTER> key.

! The SEQUENCE is restarted.

Ending the Sequence at the Stop Address (status: HOLD RDY)

Functions

! A suspended SEQUENCE can be ended at any time by

executing the stop address.

• If the memory location assigned to the stop address is empty, the Uset and Iset values from the hold address are retained. If the memory location assigned to the stop address is not empty, Uset and Iset are changed to the corresponding values. Selected dwell time Tset of the current memory location is not taken into consideration.

• The output status is determined by the contents of the stop address. The output retains its switching status (output On or Off) if the memory location assigned to the stop address is not empty. The output is switched to the off status if the memory location assigned to the stop address is empty.

Procedure:

☞ With suspended SEQUENCE,

– press the <FUNCTION> key and then browse with the <> key, the <> key or the <FUNCTION> key

until SEq stop appears and execute the command with the <ENTER> key.

! The SEQUENCE is ended and the output status is determined

by the contents of the stop address.

! The READY LED does not blink in the RDY status.

Figure 4.7.3 j Suspending and Resuming a Sequence

Executing the Next Address and Beginning Step-by-Step Control

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(status: HOLD HOLD)

From the bUS function group

Select the

device address

FUNCTION

Press repeatedly if necessary

ENTER

CE/LOCAL

FUNCTION SAVE

RCL

Uset/Iset FUNCTION

SAVE

RCL

FUNCTION

Activate

the setting

Abort

without change

Functions

! The next memory location can be selected at any time from a

suspended SEQUENCE. The setpoints saved to the next memory location are executed. Selected dwell times of the exited and the new memory address are not taken into consideration.

! The device is switched from automatic sequence to step-by-

step control the first time this step is executed (see page 36).

• The output retains its switching status (output On or Off).

• When jumping from the stop address to the start address, the remaining repetitions counter (rrep) remains unchanged.

Procedure:

☞ With suspended SEQUENCE,

– press the <FUNCTION> key and then browse with the <> key, the <> key or the <FUNCTION> key

until SEq step appears and execute the command with the <ENTER> key.

! The SEQUENCE executes the next address. ! Selected dwell times of the new and the exited memory

address are not taken into consideration.

! The READY LED blinks slowly in the HOLD status.

Executing the Start Address and Beginning Step-by-Step Control (status: HOLD HOLD or RUN HOLD)

Functions

! The start address can be selected at any time from an

interrupted or a running SEQUENCE. The setpoints saved to the start address are executed. Selected dwell times of the exited and the new memory address are not taken into consideration.

! The device is switched from automatic sequence to step-by-

step control the first time this step is executed (see page 36).

• The output is switched to the output On status.

• The remaining repetitions counter is reset to the initial value (rrep = rep).

Procedure:

☞ With interrupted or running SEQUENCE,

– press the <FUNCTION> key and then browse with the <> key, the <> key or the <FUNCTION> key

until SEq start appears, and execute the command with the <ENTER> key.

! The SEQUENCE executes the start address. ! Selected dwell times of the new and the exited memory

address are not taken into consideration.

! The READY LED blinks slowly in the HOLD status.

4.7.4 buS – The “Interface” Function Group

The KONSTANTER can be set up for data transmission to a computer in the interface configuration function group. In this case, all of the settings previously selected with DIP switches are entered via menu functions.

The serial port (RS 232) or the parallel port (IEEE 488) is used for communication.

Addr – Selecting the Device Address (IEEE 488)

• An address must be assigned to the SSP KONSTANTER in order to assure that it functions correctly together with other devices on the IEC bus.

•

If the KONSTANTER receives its own address from the computer, it interprets subsequent data and executes the respective commands.

• If it receives the address of another device, all subsequent data are ignored until it receives its own address.

Settings

☞ Procedure for selecting Addr: see also chapter 4.7 - Settings. ☞ Press the <FUNCTION> key in order to access the FUNCTION

menu.

! The last edited function or function group is accessed

automatically.

☞ Select bUS configuration if necessary by pressing the

<FUNCTION> key, or the <FUNCTION> key and the <> key or the <> key simultaneously.

! bUS appears at the left-hand display.

☞ Acknowledge by pressing the <ENTER> key.

! The bUS function menu appears.

☞ Select the Addr function by pressing the <FUNCTION> key, or

the <FUNCTION> and the <> key or the <> key simultaneously.

! Addr appears at the left-hand display, and the last selected

parameter appears at the right-hand display.

☞ Select an address for the SSP KONSTANTER with the <>

key or the <> key.

Any address within a range of 0 to 31 may be selected.

! The selected address must be the same as the address

selected for the SSP KONSTANTER at the computer.

! Address 0 is usually assigned to the controller. ! Address 31 means unL (unlist).

☞ Acknowledge your selection with the <ENTER> key.

38 GMC-I Messtechnik GmbH

Figure 4.7.4 a Path to Device Address Selection

Page 39

bAud – Setting Transmission Speed (RS 232C)

Select the text parameter from an options loop

From the bUS function group

ENTER

CE/LOCAL

FUNCTION SAVE

RCL

FUNCTION

SAVE

RCL

FUNCTION

Activate

the setting

Abort

without change

From the bUS function group

ENTER

CE/LOCAL

FUNCTION SAVE

RCL

FUNCTION

SAVE

RCL

FUNCTION

Activate

the setting

Abort

without change

Select the text parameter from an options loop

From the bUS function group

ENTER

CE/LOCAL

FUNCTION SAVE

FUNCTION

SAVE

RCL

FUNCTION

Activate

the setting

Abort

without change

• Specifies transmission speed in bits per second.

• The baud rate is an operating parameter of the serial interface.

• A low baud rate should be used in the case of large distances between communicating devices and in EMC-critical environments.

• Settings at the SSP KONSTANTER and the controller must be identical.

• The baud rate can be set to one of the following values: 50, 75, 150, 200, 300, 600, 1200, 1800, 2400, 3600, 4800, 7200, 9600 or 19,200 bits per second.

Settings

☞ Procedure for selecting bAUd, and setting the desired

transmission speed (see chapter 4.7).

! bAUd appears in the bUS display along with the related

parameter (transmission speed).

Figure 4.7.4 c Path to Selection of the dbit Text Parameter

Pbit – Setting the Parity Bit (RS 232C)

• Parity or check bits are used to detect transmission errors.

• They are added to the character string so that the sum of H or L is even or odd as defined.

• The parity bit can be set to one of the following values:

none no parity bit ZEro always 0 EVEn even numbered odd odd numbered nonE always 1

! A parity bit should always be used in EMC-critical

environments.

! Settings at the SSP KONSTANTER and the controller must be

identical.

Figure 4.7.4 b Path to Selection of the bAUd Text Parameter

dbit – Selecting the Number of Data Bits (RS 232C)

• Either 7 or 8 data bits can be used.

• Settings at the SSP KONSTANTER and the controller must be identical.

Settings

☞ Procedure for selecting dbit and the desired number of data

bits (see also chapter 4.7).

! dbit appears in the bUS display along with the related

parameter (number of data bits).

Settings

☞ Procedure for selecting Pbit and setting the parameter (see also

chapter 4.7).

! Pbit appears in the bUS display along with the related

parameter (parity bit).

Figure 4.7.4 d Path to Selection of the Pbit Text Parameter

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Sbit – Selecting the Number of Stop Bits (RS 232C)

From the bUS function group

ENTER

CE/LOCAL

FUNCTION SAVE

FUNCTION

SAVE

RCL

FUNCTION

Activate

the setting

Abort

without change

• Either 1 or 2 stop bits can be used.

! Settings at the SSP KONSTANTER and the controller must be

identical.

Settings

☞ Procedure for selecting Sbit and setting the parameter (see also

chapter 4.7).

! Sbit appears in the bUS display along with the related

parameter (number of stop bits).

Iout/A

Iset/A

Ilim/A

Delay/s

Pout/

Uout

Uset/V

Ulim/

OVset

Pout

Figure 4.8.1 Accessing Various Displays with the SELECT Key

4.8.2 Automatic Sequence Run and Step-by-Step Sequence Control

The READY LED blinks when the SEQUENCE function is active. The SELECT menu is expanded. It doesn’t matter whether the SEQUENCE function is in the RUN or the HOLD status.

Uout Iout Measured voltage and current values Uset Iset Voltage and current setpoints Pout Pout Output power tSEt xx.xx Programmed dwell time (tSEt or tdEF)

for current address, no remaining time

rcL xxx Current address, memory location

number

rrEP xxx

Selection of output quantities and setpoints is indicated by the respective LED. Uset, Iset and tSEt are the displayed setpoints of the sequence memory location which is currently being executed.

Number of remaining sequence repetitions

Figure 4.7.4 e Path to Selection of the Sbit Text Parameter

4.8 Settings with the <SELECT> Key

Depending upon settings in the FUNCTION menu, the <SELECT> keys make 3 different functions available:

4.8.1 In the Basic Function

The READY LED is continuously illuminated. After pressing the <SELECT> key, the following measured values and setting values appear at the 7-segment Uout / Iout display:

Uout Iout Measured voltage and current values Uset Iset Voltage and current setpoints Ulim Ilim Voltage and current limit values OVset Delay Pout Pout Output power

Setting Procedure

☞ Repeatedly press the <SELECT> key until the LED for the

desired function lights up and the setting value appears at the display.

• Resolution (cursor position) for the numeric parameter [V]:

☞ Repeatedly press the <RESOL> key [19].

The cursor advances in a loop from right to left.

☞ The cursor blinks allowing for identification of its current

position.

• Select a value for the desired function:

☞ With the <> key (increase value) or the <> (decrease

value) key, independent of resolution!

! The last selected value becomes immediately active.

• Abort the procedure:

☞ By slightly turning a rotary knob ([5] or [8]). ☞ With the CE/LOCAL, SAVE, RCL or FUNCTION key.

Overvoltage setpoint and overcurrent delay

4.8.3 Displaying Stored Data Upon Execution of <RCL>

Displaying Data Stored to Setup Memory (1 ... 10) Upon Execution of <RCL>

After executing the <RCL> command, selecting a memory location (<> or <> key) and pressing the <ENTER> key, the device is switched to the read-out mode. Values saved to setup memory blink at the display. The basic settings stored to the selected memory location can now be browsed by pressing the <SELECT> key:

Uset Iset Voltage and current setpoints Ulim Ilim Voltage and current limit values OVset Delay

Overvoltage setpoint and overcurrent delay outP Output switching status after power on OCP Overcurrent protection UI_

Min-Max value recording tdEF Dwell time independent of memory location tSEt Programmed dwell time Strt Start address StoP Stop address rEP Number of repetitions

Displaying Data Stored to Sequence Memory (11 ... 255) Upon Execution of <RCL>

After executing the <RCL> command, selecting a memory location (<> or <> key) and pressing the <ENTER> key, the device is switched to the read-out mode. Values saved to sequence memory blink at the display. The settings stored to the selected memory location can now be browsed by pressing the <SELECT> key:

Uset Iset Voltage and current setpoints tSEt Programmed dwell time

40 GMC-I Messtechnik GmbH

Page 41

4.9 Setting Resolution with the <RESOL> Key

Cursor position

RESOL

Resolution of

numeric parameter

CE/LOCAL

Basic Settings

FUNCTION RCL

Uout/Iout

Uset/Iset

FUNCTION

RCL

ENTER

SAVE

Activate

the setting

Numeric parameters can be set to varying degrees of accuracy. Set the cursor to the desired decimal place within the display to this end. The corresponding decimal place blinks in order to indicate the current cursor position.

Resolution can be set for the following parameters: ☞ Uset, Iset, Ulim, Ilim, OVset, Delay, tset and tdef

Settings

☞ Select the desired parameter.

! The parameter value blinks at the last selected decimal place.

☞ Press the <RESOL> key. The cursor (blinking decimal place) is

moved one place to the right.

☞ Repeatedly press the <RESOL> key until the cursor is

positioned at the desired decimal place.

☞ Set the parameter to the desired value with the <> key or the

<> key using the selected resolution.

Settings

☞ Select values for the desired parameters. ☞ Press the <SAVE> key.

! Sto appears at the left-hand display, and the last selected

memory location number appears at the right-hand display.

☞ Select the desired memory location (1 to 10) with the <> or

the <> key.

☞ Acknowledge by pressing the <ENTER> key. ☞ Exit the SAVE function by pressing the <CE/LOCAL> key. ☞ Switch to the respective function by pressing the <FUNCTION>

key, the <SELECT> key or the <RCL> key, or by slightly turning the current or voltage adjusting knob.

Figure 4.9 Selecting Setting Resolution with the RESOL Key

4.10 Storing Data with the <SAVE> Key

The <SAVE> key is used for the following functions:

• Saving basic device settings

• Saving data to a memory location

• Deleting all data within a defined memory range from address 11 to 255

• Inserting additional data to a SEQUENCE

• Deleting an individual SEQUENCE memory location

4.10.1 Saving Basic Device Settings

• Basic device settings can be saved to memory locations 1 through 10.

• These settings are saved to battery-backed memory. Settings for all of the following parameters can be saved to this memory:

USET/ISET OVSET TSET OCP TDEF DELAY START OUTPUT MINMAX STOP ULIM REPETITION ILIM

Figure 4.10.1 Saving Device Settings

4.10.2 Saving Data to a Memory Location

Functions

• SEQUENCE data can be saved to memory locations 11 through

255.

• These settings are saved to battery-backed memory.

• Uset, Iset and Tset values can be saved.

Settings (see also page 35)

☞ Select values for the desired parameters. ☞ Press the <SAVE> key.

! Sto appears at the left-hand display, and the last selected

memory location number appears at the right-hand display.

☞ Select the desired memory location (11 to 255) with the <>

key or the <> key.

☞ Acknowledge by pressing the <ENTER> key.

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4.10.3 Clearing the Contents of a Defined Memory Range

ENTER

SAVE

ENTER

Clear range from start to stop address

Abort

CE/LOCAL

FUNCTION RCL

Uout/Iout

Uset/Iset

FUNCTION

RCL

Example of clearing all cont ent from start to stop address:

occupied

empty empty

start °1 sequence °1 stop °1 start °2 sequence °2 stop °2

S | t | o |

Operation "Clearing content of a memory range"

c | l | r |

The content of the memo ries between

Functions

• All data are deleted from memory locations from the current start address to the current stop address.

Settings

☞ Press the <SAVE> key. ☞ Select memory location 0 (clr) with the <> key or the <> key.

☞ Press the <ENTER> key.

! clr dAtA and start stop blink alternately at the display in order to

identify the range to be deleted.

☞ Acknowledge by pressing the <ENTER> key.

! The range of memory locations from the start address to the

stop address are cleared.

! Deletion of data can be aborted at any time by pressing the

<CE/LOCAL> key.

Figure 4.10.3 Clearing all Content from the Start to the Stop

Address

011

current start

S | t | r | t S | t | o | P

c | l | r | d | A | t | A

Current stop

start and stop address is empty!

255

42 GMC-I Messtechnik GmbH

Page 43

4.10.4 Inserting a Memory Location

CE/LOCAL

FUNCTION RCL

Uout/Iout

Uset/Iset

FUNCTION

RCL

ENTER

SAVE

Start and Stop Address

Abort

All memory locations  address 103 are shifted up by 1.

Memory location 103 is empty and the content of the stop address is lost.

Example of inserting an em pty memory location wit hi n a gi ven memory range:

occupied

empty empty

start °1 sequence °1 stop °1 start °2 sequence °2 stop °2

current stop

S | t | o | Y | Y | Y | i

YYY

The start and stop addresses define the working range for the command described below. Memory locations which do not lie within this range are protected against access when executing this command. Each time an empty memory location is inserted, the contents of the previous stop address are lost.

Functions

• Starting with the target address, previously saved data are shifted to the next highest address number.

• Memory location content located at memory address N prior to insertion, is shifted to memory address N+1.

• Data which were previously stored to the memory location with the stop address are lost.

• The target address has no content after initial insertion.

Attention: Currently selected start and stop addresses and start and stop addresses saved to setup memory are not corrected automatically!

Settings

☞ Select a start address and a stop address with the help of the

sequence submenu.

☞ Press the <SAVE> key.

! Sto and the last selected address appear at the display.

☞ Select the desired target address with the <> key or the <>

key.

☞ Simultaneously press the <SAVE> and <> keys.

! An i (for insert) appears in the right-hand display next to the

selected address number.

☞ Execute the insert command by pressing the <ENTER> key.

! An empty memory location is added at the selected memory

address.

! The address numbers of all memory locations above the

selected address are increased by 1.

Figure 4.10.4 Inserting a Memory Location Within a Given Range

011

YYY+1

-1 sto

Sto

Insertion

current start

GMC-I Messtechnik GmbH 43

The previous content of the stop address is lost!

255

Page 44

4.10.5 Deleting a Memory Location

CE/LOCAL

Start and Stop Address

FUNCTION RCL

Uout/Iout

Uset/Iset

FUNCTION

RCL

ENTER

SAVE

Content of memory location 103 (n) is overwritten by content from location 104 (n+1).

The stop address has not content.

Abort

Example of deleting an individual S E Q UE NCE memory locati on:

occupied

empty empty

start °1 sequence °1 stop °1 start °2 sequence °2 stop °2

current stop

YYY

S | t | o |

current stop

The start and stop addresses define the working range for the command described below. Memory locations which do not lie within this range are protected against access when executing this command. Each time a memory location is deleted, an empty memory location is inserted at the stop address.

Functions

• Starting with the target address, previously saved data are shifted to lower address numbers.

• Memory location content located at memory address N prior to deletion is shifted to memory address N-1.

• Data which were previously stored to the memory location with the target address are lost.

• The stop address has no content after initial deletion.

Attention: Currently selected start and stop addresses and start and stop addresses saved to setup memory are not corrected automatically!

Settings

☞ Select a start address and a stop address with the help of the

sequence submenu.

☞ Press the <SAVE> key.

! Sto and the last selected address appear at the display.

☞ Select the desired target address with the <> key or the <>

key.

☞ Simultaneously press the <SAVE> and <> keys.

! A d (for delete) appears in the right-hand display next to the

selected memory address.

☞ Execute the delete command by pressing the <ENTER> key.

! The address numbers of all memory locations within the start

to stop address range above the selected address are decreased by 1.

Figure 4.10.5 Deleting an Individual SEQUENCE Memory Location

011

current start

Deletion

current start

YYY+1

Y | Y | Y | d

YYY

-1 sto

The new content of the stop address is empty!

255

44 GMC-I Messtechnik GmbH

Page 45

4.10.6 Deleting the Contents of a Memory Location

CE/LOCAL

FUNCTION RCL

Uout/Iout

Uset/Iset

FUNCTION

RCL

ENTER

SAVE

Abort

Contents of location 103 are deleted.

Example of deleting the cont ent of an individual memory location:

occupied

empty empty

start °1 sequence °1 stop °1 start °2 sequence °2 stop °2

current stop

S | t | o |

Operation "Deleting the content of a

start- an d st op a dd ress

Functions

• The contents of any desired individual memory location from address 11 through 255 can be deleted.

• This has no effect on other memory location addresses.

Settings

☞ Press the <SAVE> key.

! Sto and the last selected address appear at the display.

☞ Select the desired address with the <> key or the <> key. ☞ Simultaneously press the <SAVE> and <CE/LOCAL> keys.

! A c (for clear) appears in the right-hand display next to the

selected memory location address number.

☞ Execute the delete command by pressing the <ENTER> key.

Figure 4.10.6 Deleting the Contents of an Individual Memory Location

011

current start

4.11 Memory Recall with the <RCL> Key

• All device settings saved to memory with <SAVE> or STORE can be recalled with the <RCL> key (RECALL), e.g. in order to reconfigure the device. This memory is battery-backed.

• Empty memory locations are displayed as “----” “----”, and cannot be recalled.

• RCL can also be controlled via the analog interface (see page 29 and chapter 5.7).

4.11.1 Recall from SETUP Memory

Addr. 1 to 10: Complete basic device settings USET OVset OCP START ISET Ulim DELAY STOP Tset Ilim MINMAX REPETITION

OUTPUT Tdef

Settings

☞ Press the <RCL> key.

! rcl appears at the left-hand display, and the last selected

memory location number appears at the right-hand display.

☞ Select the desired address [1 ... 10] by pressing the <> key

GMC-I Messtechnik GmbH 45

sto

255

Independent of current

YYY

Y | Y | Y | c

memory"

The content of the selected memory is empty!

or the <> key.

☞ Press the <ENTER> key.

! Iset and Uset settings saved to this address blink at the

display.

☞ Browse through this memory location with the <SELECT> key

in order to view the respective parameter settings (see chapter 4.8).

☞ All of the data saved to this memory location can now be

loaded as basic settings by once again pressing the <ENTER> key.

☞ Press the <CE/LOCAL> key to abort the RECALL function. ☞ Press the <RCL> key in order to return to the memory location

selection function.

☞ The RECALL function can be exited by pressing any other

function key, or by turning the adjusting knob.

4.11.2 Recall from SEQUENCE Memory

Addr. 11 to 255: Uset, Iset and tSEt values for the sequence

function

☞ Data from memory locations 11 through 255 can be recalled

at any time during programming.

Page 46

☞ Press the <RCL> key.

! rcl appears at the left-hand display, and the last selected

memory location number appears at the right-hand display.

☞ Select the desired address (11 ... 255) by pressing the <>

key or the <> key.

☞ Acknowledge your selection with the <ENTER> key.

! Iset and Uset settings saved to this address blink at the

display.

☞ Browse through this memory location with the <SELECT> key

in order to view the respective parameter settings (see chapter 4.8).

☞ All of the data saved to this memory location can now be

loaded by once again pressing the <ENTER> key.

! If one of the recalled Uset or Iset values exceeds the currently

valid soft limit (Ulim and Ilim), execution of the command is aborted, Err 21 id displayed briefly and bit 5 is set in event register B.

! Only Uset and Iset are executed: tset is loaded as a current

setting value and is not executed.

☞ Another memory location can be immediately accessed with

the <> key or the <> key while the previous function is being executed.

☞ Press the <CE/LOCAL> key to abort the RECALL function. ☞ Press the <RCL> key in order to return to the memory location

selection function.

☞ The RECALL function can be exited and another function

accessed by pressing any other function key, or by turning the adjusting knob.

Activating Parameter Values

Textual or numeric parameter values are activated with the <ENTER> key during device setup.

Executing Commands

<SAVE>: save data to the selected address. <RCL>: recall data saved to the selected address. After pressing

the <ENTER> key the first time, the selected data blink at the display, and are then executed after pressing the <ENTER> key once again.

Sequence control: execution of SEq xxxx commands. Function group selection: access parameter settings for the

selected function group.

Sequence and Step-by-Step Control

A running sequence can be suspended by pressing the <ENTER> key.

Status change: RUN  HOLD

A suspended sequence can be resumed by pressing the <ENTER> key.

Status change: HOLD  RUN

The next memory location can be executed by pressing the <ENTER> key in the step-by-step control mode.

4.14 The <CE/LOCAL> Key

The <CE/LOCAL> key is used to execute a specific function in combination with the respectively selected operating mode.

4.12 Disabling Front Panel Controls

The front panel controls can be disabled against inadvertent changes to selected values and settings.

The behaviour during power on is also determined by the selected power-on status parameter Pon (page 27).

Disabling

☞ Simultaneously press the <CE/LOCAL> and <RCL> keys.

! The front panel controls are now disabled. ! The yellow LOCAL LOCKED LED lights up.

Enabling

☞ Press and hold the <CE/LOCAL> key for at least 4 seconds,

or until the LOCAL LOCKED LED goes out.

Disabling and Enabling via the Analog Interface

☞ The <CE/LOCAL> key can also be disabled by applying a signal

to the trigger input at the analog interface and selecting the appropriate setting for the T_MODE function, thus preventing manual reactivation of the front panel controls.

4.13 The <ENTER> Key

The <ENTER> key is used to execute various functions in combination with the respectively selected operating mode.

Pre-Selecting Setpoints (fixed value selection)

1) <ENTER>: change display from Uout/Iout to Uset*/Iset.

2) <> or <>: preselect Uset, Uset LED blinks.

3) <ENTER>: activate Uset value.

4) <ENTER>: change to Iset*.

5) <> or <>: preselect Iset, Iset LED blinks.

6) <ENTER>: activate Iset value.

* The adjustable <RESOL> decimal place blinks.

See also page 22, Pre-Selected Settings.

RESET Device Settings

See chapter 4.16.

Disable and Enable Front Panel Controls

See chapter 4.12.

Switch from REMOTE to LOCAL

See chapter 4.17.

Abort an Operation

Uset / Iset Entry

☞ <CE/LOCAL> key

Switch to display of measured Uout and Iout values.

<SELECT> Display ☞ <CE/LOCAL> key

Switch to display of measured Uout and Iout values.

<SAVE> / <RCL> Function ☞ <CE/LOCAL> key

Abort <SAVE> and <RCL> functions, switch to display of measured Uout and Iout values.

Function Group Selection ☞ <CE/LOCAL> key

Return to display of measured Uout and Iout values from function group selection.

Function Selection ☞ <CE/LOCAL> key

Abort function selection, return to function group selection.

Text Parameters ☞ <CE/LOCAL> key

Abort selection, switch to display of selected text parameter.

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Page 47

Sequence Control ☞ <CE/LOCAL> key

Abort a suspended sequence or step-by-step control at the current memory location.

4.15 INCR <> and DECR <> Keys

The increment and decrement keys execute various functions depending upon settings.

4.16 Device RESET

Most device functions can be returned to a defined default value with the reset command (see chapter 8.1 and page 62).

☞ Press and hold the <CE/LOCAL> key, and then press the

<ENTER> key.

4.17 Selecting Remote and Local Control Modes



Parameter Selection

Text parameters

<> or <> displays next or previous parameter. Acknowledge the respective text parameter with the

<ENTER> key. Abort with rotary knob <CE/LOCAL>, <RCL>, <SAVE> or

<FUNCTION>.

Numeric parameters

<> or <>: increase or decrease the value of the parameter at the cursor position.

<RESOL> is used to move the cursor. The respective numeric parameter is activated automatically.

Exception:

Settings for Uset and Iset initialized with the <ENTER> key (setpoint settings) and selected with the <> key < or the <> key, must also be acknowledged with the <ENTER> key.

Memory Location Selection



After Pressing <RCL> or <SAVE>

<> or <> selects next or previous memory location.

Address by address preview of stored setpoints:

After pressing <RCL>  <>/<> 11 ... 255  <ENTER>: Blinking display of USET, ISET and TSET setpoints, can be

selected with <SELECT>, browse though addresses in the background with selected setpoint using <> or <>, the respective stored setpoint is displayed.

Browsing through Submenus



Function menu

<FUNCTION> + <> or <> Switch to next or previous function or function group.

Browsing through Min-Max Memory



After querying U_, U¯, I_ or I¯ in the SET menu, these values can be browsed using <> or <>.

Executing the Next or the Previous Memory Location



in Step-by-Step Control Mode

After executing SEQ Strt or SEQ StEP with a running or a suspended sequence, the next or the previous memory location can be executed with <> or <>.

After switching mains power on, the manual operating mode is always active (local state): All front panel controls are enabled and the device can be operated manually.

a) LOCAL —> REMOTE

– Switching from manual to remote control

Switching to remote control occurs: Via the IEC bus interface

– When the REN line is activated by the controller and – The device is addressed as a listener Via the serial interface – As soon as data are transmitted to the device.

b) REMOTE  LOCAL

– Switching from remote to manual control

The device is returned to manual operation: Manually

– By activating the <CE/LOCAL> key, as long as it has not

been disabled by the controller during IEC bus operation ( c)

–Via the IEC bus – By transmitting the addressed GTL (GO TO LOCAL)

interface command to the device (selective switching to manual operation), Programming example (HP Basic): LOCAL 712 or

– If the REN line is deactivated by the controller (switches all

devices to manual operation), Programming example (HP Basic): LOCAL 7

c) LOCAL LOCKOUT

– Disabling manual return to local operation

(only relevant for control via the IEC bus)

The IEC bus controller can disable the LOCAL key at the device with the LLO (LOCAL LOCKOUT) universal interface command, preventing manual return to the local operating mode (remote state with lock). Programming example (HP Basic): LOCAL LOCKOUT 7

Comment

The “REMOTE” LED indicates the momentary control mode:

LED on = remote mode LED off = manual mode

Switching back and forth between the two control modes does not cause any changes to current device settings or stored parameters. Exception when switching from REMOTE  LOCAL: If the display has been switched off it is reactivated (DISPLAY OFF —> DISPLAY ON).

IEC bus control: The device is capable of receiving programming data in the manual operating mode, but they are not executed.

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Page 48

5 Analog Interface

+15 V

AGND

TRIGGER +

TRIGGER–

Uset +

Uset GND

M/S Uset +

U-MONITOR

Iset +

+SENSE

10 k

1.5 k

9 k 3

10 k

+OUT

–OUT

R1 = 80 k for 40 V models

= 104 k for 52 V models

510

110 mA

18 V

+15 V

Uset int.

10 k

Uset int.

Iset GND

I-MONITOR

–SENSE

Sense Control

U-Monitor

5 k

R 1

= 160 k for 80 V models

5.1 Pin Assignments

+15 V (output)

Internal auxiliary voltage (+15 V  3% with reference to AGND) is connected to this terminal via a protective resistor with a value of 510 . It can thus be used to drive the TRIGGER input, or to supply power to external components such as reference elements for the generation of control voltages. The output is short-circuit proof to AGND.

AGND (analog ground)

Reference point for analog control inputs and outputs. This terminal is internally connected to the minus pole of the power output via an auto-reversible fuse with a rating of 110 mA.

TRIGGER+, TRIGGER– (input)

Floating digital control input, whose function (output On/Off or memory recall) can be selected with the front panel controls. Low signal: 0 V  U

High signal: 4V  U

 1 V

 26 V, Is = (Us – 2 V) / 1.5 k

The input is reverse-polarity protected to –26 V.

Uset+, Uset GND (input)

Analog (differential) voltage input with reference to AGND for controlling output voltage. The following applies when the output is activated:

Uout = Uset + Usu * k

Uout = output voltage in constant voltage regulating mode Uset = Uset voltage value selected either manually or

via interface control

Usu = external control voltage (0 ... 5 V 0 ... Uout nom) ku = control coefficient = Uout nom / 5 V

Figure 5.1 Auto-Sensing Mode

M / S Uset+ (input)

Analog control input with reference to AGND for series masterslave connection.

U-MONITOR (output)

Analog voltage output signal, proportional to output voltage acquired by the sensing leads (0 ... 10 V 0 ... Uout nom). The short-circuit proof output is referenced to AGND and has an internal resistance of 5 k.

Iset+, Iset GND (input)

Analog (differential) voltage input with reference to AGND for controlling output current. The following applies when the output is activated:

Iout = Iset + U

* k

Iout = output current in constant current regulating mode Iset = current value selected either manually or

via interface control

= external control voltage (0 ... 5 V 0 ... Iout nom)

= control coefficient = Iout nom / 5 V

I-MONITOR (output)

Analog voltage output signal, proportional to output current (0 ... 10 V 0 ... Iout nom). The short-circuit proof output is referenced to AGND and has an internal resistance of 9.3 k.

+SENSE, –SENSE (input)

For connection of sensing leads for 4-wire operation – allows for compensation of voltage drops (to 2 * 2 V) at long output leads. Switching to 4-wire operation takes place automatically when the –SENSE lead is connected to the respective negative output pole.

48 GMC-I Messtechnik GmbH

Page 49

5.2 Auto-sensing mode

CS+, CS– = 10F ... 220 F U

S+

, US– 1 V

S+

 U

outS

/ 160 k

S–

 0.3 mA

Functions

Output voltage values required for voltage measuring and control circuits can be acquired directly at the power consumer instead of at the output terminals with the help of the +SENSE and – SENSE sensing lead terminals at the analog interface. Sensing mode operation (remote sensing) offers the following advantages: – In the constant voltage regulating mode, current related voltage

drops occurring in the output leads have practically no effect on voltage supplied to the power consumer. Voltage at the output terminals is automatically increased to compensate for voltage drops.

– In the constant current regulating mode, voltage limiting at the

power consumer is independent of output current.

– Since the voltage value provided by the measuring function is

relative to the voltage value acquired at the sensing leads, load parameters such as power consumption and load resistance can be more accurately determined.

The parameters and limit values included in Figure 5.2 and in chapter 1.5.3, Electrical Data, apply for operation with the sensing leads.

Connection

The two sensing lead terminals at the analog interface (+SENSE and –SENSE) must be connected to their respective output poles at the desired point (generally speaking as close to the power consumer as possible). It is advisable to twist and/or shield the sensing leads in order to minimize interference (connect the shield to the ground terminal of the negative output pole). Long output and sensing lead impedances may result in control fluctuations at the output, especially with capacitive power consumers. This effect can be counteracted by connecting capacitors (CS+, CS–) between the SENSE and output terminals (see Figure 5.2). If the output leads are twisted, their impedance can be reduced as well. Incorrect connection of the sensing leads does not damage the device, although it results in the following reversible events: – Sensing leads with reversed polarity or interrupted output lead:

If output voltage is not being limited at the device by means of current regulation, it climbs to well above the selected value which finally triggers overvoltage protection and immediately deactivates the output.

– Interrup ted +SENSE lead:

Voltage between the output terminals increases by approximately 7%.

– Interrup ted –SENSE lead:

The sensing terminals are deactivated (automatic return to local sensing). If the sensing leads have been connected incorrectly, increasing voltage between the output terminals is not acquired by the measuring function.

Figure 5.2 Connecting the Power Consumer for Sensing Mode

Operation

Switching the Instrument On

The remote sensing mode function is activated automatically after the –SENSE terminal has been connected to the corresponding output pole. The function is deactivated by once again interrupting this connection.

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Page 50

5.3 Regulating Output Voltage

Analog Interface

+15 V AGND

TRIGGER + TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings: USET = 0 ISET = Iset

OUTPUT on/off

Uout

Load

REF 02

OUT +5V

SSP KONSTANTER

SENSE

+SENSE

Analog Interface

+15 V AGND

TRIGGER + TRIGGER 

Uset +

Uset GND

M/S Uset +

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

Settings: USET = 0 ISET = Iset

OUTPUT on/off

Uout

SSP KONSTANTER

–OUT

Load

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

Analog Interface

+15 V AGND

TRIGGER + TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings: USET = Uset ISET = 0

OUTPUT on/off

Uout

Load

REF 02

OUT +5V

SSP KONSTANTER

SENSE

+SENSE

Analog Interface

+15 V

AGND

TRIGGER + TRIGGER 

Uset +

Uset GND

M/S Uset +

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

Settings: USET = Uset ISET = 0

OUTPUT on/off

Uout

SSP KONSTANTER

–OUT

Load

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

Iout Iout

5.4 Regulating Output Current

Functions

The control inputs Uset+ (non-inverting) and Uset GND (inverting) allow for adjustment of output voltage Uout with an external control voltage U

The following applies in the constant voltage regulating mode:

Uout = USET + U

x k

USET = voltage setpoint selected manually or via interface k

= voltage control coefficient = Uoutnom/ 5 V

Max. adjusting error: ± 0.05% Unom ± 0.2% setpoint value

The voltage control input functions as a differential voltage input: Uset+ = non-inverting input:

USU = 0 ... +5 V for Uout = 0 V ... Uoutnom

Uset GND = inverting input:

= 0 ... -5 V for Uout = 0 V ... Uoutnom

Input resistance is 10 k in both cases.

Note:

The control inputs are not floating inputs: Their reference point, AGND, is connected to the negative output pole. Connecting grounded circuits to the control input may result in erroneous adjustments due to leakage current or ground loops.

If the reference point of control voltage USU is connected to the negative output pole at the load side, the inverting input must be connected to this point in order to prevent influences due to voltage drops at the output lead (connection b in Figure 5.3a). If control voltage is isolated from the output, Uset GND must be connected with AGND (connection a in Figure 5.3a).

Functions

The control inputs Iset+ (non-inverting) and Iset GND (inverting) allow for adjustment of output current Iout with an external control voltage U

The following applies in the constant voltage regulating mode:

Iout = ISET + U

x k

ISET = current setpoint selected manually or via interface k

= current control coefficient = Ioutnom / 5 V

Max. adjusting error: ± 0.1% Unom ± 0.3% setpoint value

The current control input functions as a differential voltage input: Iset+ = non-inverting input:

USI = 0 ... +5 V for Iout = 0 A ... Ioutnom

Iset GND = inverting input:

= 0 ... -5 V for Iout = 0 A ... Ioutnom

Input resistance is 10 k in both cases.

Note:

If the reference point of control voltage U

is connected to the

negative output pole at the load side, the inverting input must be connected to this point in order to prevent influences due to voltage drops at the output lead (connection b in Figure 5.4a). If control voltage is isolated from the output, Iset GND must be connected with AGND (connection a in Figure 5.4a).

can also be applied as an alternating voltage, for example in

order to superimpose manually selected direct voltage USET with interference signals. The maximum operating frequency of modulated output voltage depends upon voltage amplitude, the current limiting setting and load, and thus cannot be defined with a simple formula. It is increased as amplitude is decreased, and as current limiting and load are increased.

can also be applied as an alternating voltage, for example in

order to superimpose manually selected direct current ISET with interference signals. To a great extent, the maximum operating frequency of modulated output current depends upon the output current value, as well as the voltage amplitude which results from the prevailing load, and thus cannot be defined with a simple formula. It is increased as amplitude is decreased, and as load is increased.

If remote output voltage adjustment is to be accomplished by means of a potentiometer, wiring can be configured as shown in the example in Figure 5.3b.

If remote output current adjustment is to be accomplished by means of a potentiometer, wiring can be configured as shown in the example in Figure 5.4b.

Figure 5.3a Wiring for Voltage

50 GMC-I Messtechnik GmbH

Regulation with External Voltage

Figure 5.3b Wiring for Voltage

Regulation with External Potentiometer

Figure 5.4a Wiring for Current

Regulation with External Voltage

Figure 5.4b Wiring for Current

Regulation with External Potentiometer

Page 51

5.5 Voltage Monitoring Output

Analog Interface

+15 V

AGND

TRIGGER +

TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings: USET = Uset ISET = Iset

OUTPUT on/off

Uout

Load

SSP KONSTANTER

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

Iout

Analog Interface

+15 V

AGND

TRIGGER + TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings: USET = Uset ISET = Iset OUTPUT on/off

Uout

Load

SSP KONSTANTER

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

Iout

5.6 Current Monitoring Output

Functions

The U-MONITOR terminal reads out a voltage with reference to AGND, which is proportional to output voltage Uout. This is used as a control voltage for master-slave series connection (see

5.9.2). However, it can also be used for external measuring,

monitoring and recording.

Note:

The monitor output is not a floating output: Its reference point, AGND, is connected to the negative output pole. Connecting grounded measuring circuits to the monitor output may result in erroneous measurements due to leakage current or ground loops.

The voltage monitoring output makes reference to output voltage acquired at the sensing leads (see 5.2).

The monitor output is short-circuit proof. It has an internal resistance of 5 k.

= Uout x kMU = 0 ... 10 V

= 10 V / Uoutnom

= 0.25 for 40 V models = 0.192 for 52 V models = 0.125 for 80 V models

Functions

The I-MONITOR terminal reads out a voltage with reference to AGND, which is proportional to output current Iout. This is used as a control voltage for master-slave parallel connection (see

5.8.2). However, it can also be used for external measuring, monitoring and recording.

Note:

Monitor voltage is derived from voltage drop at the internal current sensing resistor (shunt), which is connected to the negative output conductor upstream from the output capacitor. In this way, the current monitor also acquires dynamic charging and discharging current at the output capacitor when output voltage is increased or decreased, or when the output is activated and deactivated.

The monitor output is short-circuit proof. It has an internal resistance of 9.3 k.

= Iout x kMI = 0 ... 10 V

= 10 V / Ioutnom

(U-MONITOR) = 5 k

Max. error for U

: ± 0.5 mV ± 0.2%

(I-MONITOR) = 9.3 k

Max. error for U

: ± 0.5 mV ± 0.3%

Figure 5.5 Voltage Monitor Wiring

Figure 5.6 Current Monitor Wiring

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5.7 Trigger Input

Analog Interface

+15 V

AGND

TRIGGER + TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings: USET = Uset ISET = Iset

T_MODE OFF

IS = 10 mA

Load

SSP KONSTANTER

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

Iout

Analog Interface

+15 V AGND

TRIGGER + TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings: USET = Uset ISET = Iset T_MODE OFF

Load

SSP KONSTANTER

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

Iout

Functions

The floating TRIGGER + input with optocoupler allows for remote control of a device function by means of a binary signal. The function to be controlled is selected with the T_MODE setting (in the trG display). A detailed description is included on page 74.

Connection

Connect the control signal to TRIGGER + and TRIGGER –. Refer to the table below for the respective signal level.

Signal U

High 4 ... 26 V DC (US – 2 V) / 1.5 k

Low 0 ... 1 V DC 0 mA

The TRIGGER input can be driven with the + 15 V output at the analog interface via any desired switch (Figure 5.7a).

Warning! The TRIGGER + input is a floating input and is functionally isolated from the output current circuit. This functional isolation is not equivalent to “safety separation” as specified in electrical safety regulations.

Note

Trigger signal pulses must have a minimum duration of 14 ms in order to assure reliable recognition. A delay of 1 to 15 ms may occur between application of the control signal and triggering of the controlled function.

Trigger Function setting Parameters

Parameter Meaning

OFF Trigger input function is deactivated, trigger signals have no

OUT OUTPUT Trigger signal acts upon the OUTPUT: output On/Off

Low OUTPUT depends upon manual setting or programming

Edge Low High

High OUTPUT is OFF and cannot be activated (neither manually nor

Edge High  Low

RCL RECALL Memory recall (step-by-step sequence control)

Edge Low  High

High – The trigger signal is a high pulse with a duration

Edge High  Low

SEQ SEQUENCE Sequence execution control

Edge Low  High

Edge High  Low

LLO LOCAL

LOCKED

Low All front panel controls are functional.

High All front panel controls are disabled except for the mains

MIN MINMAX Storage of Min-Max values for U and I is controlled when the

Low The Min-Max function is active.

Edge Low  High

High The Min-Max function is inactive.

Edge High  Low

effect.

command

OUTPUT remains OFF or OUTPUT is switched OFF

by means of a program command).

OUTPUT is activated, exception: OTP or OVP

Start trigger signal

of 11 to 800 ms. – A pulse with t start address at any point in time, and execution begins with the next trigger signal.

> 1.0 s resets the address counter to the

high

The high  low edge of the (short) trigger signal results in step-by-step control of the currently selected sequence, regardless of the specified time and number of repetitions. Recall of the memory’s contents begins with the START address. Each trigger signal increasers the address by 1, until the STOP address is reached. The next pulse once again causes execution of the contents of the START address.

The SEQUENCE function is started beginning with the start address (SEQUENCE GO).

Ends sequence execution by jumping to the stop address

Front panel control disabling

switch, and activation is not possible with the LOCAL key.

MINMAX function is activated (MINMAX ON)(UI_

The Min-Max function is deactivated. Values in the Min-Max memories remain unchanged.

Values in the Min-Max memories are reset and replaced with momentary output values. The Min-Max function is activated.

ON).

Figure 5.7a Driving the TRIGGER Input with a Switch Contact

Figure 5.7b Driving the TRIGGER Input with an External Signal

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5.8 Parallel Connection

Analog Interface

+15 V AGND

TRIGGER + TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings: USET = Uset ISET1+2+3=Iset

OUTPUT on/off

SSP KONSTANTER

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

Device 3

Analog Interface

+15 V

AGND

TRIGGER +

TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings: USET = Uset ISET1+2+3=Iset

OUTPUT on/off

SSP KONSTANTER

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

Device 2

Analog Interface

+15 V AGND

TRIGGER + TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings: USET = Uset ISET1+2+3=Iset

OUTPUT on/off

Load

SSP KONSTANTER

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

Device 1

Optional

Connection

Ideal working

current regulation at

Ideal working range for voltage regulation at the load

out1

out2

out3

out1

out2

out3

UA / V

/ A

range for

the load

If output current from a single KONSTANTER is insufficient for the respective application, the outputs of any number of KONSTANTERs can be parallel connected.

Caution! If outputs with different nominal voltages are parallel connected, all outputs must be limited to the lowest utilized nominal voltage value. The ULIM parameter is used to select this setting.

5.8.1 Direct Parallel Connection

Functions

Easiest way to provide the power consumer with more current than is available from a single KONSTANTER.

KONSTANTERs with differing nominal output voltages can be used. However, all voltage setpoints must be set or limited to the same value.

This setup is less suitable for the constant voltage regulating mode.

Wiring

Functional Principle

After switching the outputs on, load current is initially supplied by the KONSTANTER with the highest voltage setting. If load resistance is continuously reduced, load current is continuously increased. When load current reaches the ISET value selected for the output which is momentarily supplying power to the consumer, current limiting is activated for this output. If load resistance is further decreased, current regulation reduces output voltage until the voltage value of the output with the next lowest setting is reached. As of this point in time, this KONSTANTER also supplies a portion of the load current. This procedure is continued until load current triggers current regulating at the output with the lowest voltage setting when the setpoint value for cumulative current is reached. This output maintains constant load current until the load resistor is short-circuited.

Figure 5.8.1b U / I Diagram for Direct Parallel Connection

Note:

Slightly varying voltages occur at the individual outputs as a result of setting tolerances.

Figure 5.8.1a Wiring for Direct Parallel Connection

In the event of larger voltage differences, an electronic sink is activated at the outputs with lower voltage settings.

Settings

Deactivate all outputs. Adjust voltage setpoint USET of all parallel connected KONSTANTERs to approximately the same value:

Uset = USET1 = USET2 = USET3 = USETn Adjust the current setpoints ISET such that they add up to the desired cumulative current value Iset:

Iset = ISET1 + ISET2 + ISET3 + ... + ISETn Activate the outputs.

The sink controller attempts to reach the lower voltage value by limiting power consumption. Neither the KONSTANTER nor the power consumer are damaged as a result. If problems occur with the measurement of load current, the KONSTANTERs should be linked by means of master-slave parallel connection (see also chapter 5.8.2). Outputs can be simultaneously activated and deactivated by connecting the TRG inputs (setting: trG out) in parallel (Figure

5.8.1a, optional connection) or in series (see also page 74).

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5.8.2 Master-Slave Parallel Connection

Analog Interface

+15 V

AGND

TRIGGER + TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings: USET>Uset master ISET = 0 A OUTPUT on

SSP KONSTANTER

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

SLAVE 2

Analog Interface

+15 V

AGND

TRIGGER +

TRIGGER 

Uset +

Uset GND

M/S Uset +

SSP KONSTANTER

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

SLAVE 1

Analog Interface

+15 V AGND

TRIGGER +

TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings: USET = Uset ISET = Iset / n OUTPUT on/off

Load

SSP KONSTANTER

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

MASTER

POWER_ON rcl

Settings: USET>Uset master ISET = 0 A OUTPUT on POWER_ON rcl

sym

= only required for sensing mode operation= only required for sensing mode operation

Optional Connection

Functions

As opposed to direct parallel connection, master-slave parallel connection offers significant advantages:

– Equally suitable for voltage and current regulation – Output parameters (output voltage, cumulative current limiting)

are set entirely by the master device.

– All interconnected KONSTANTERs are equally loaded.

Wiring

Define one power supply as a master device. Connect master and slave devices as shown in Figure 5.8.2. Connect the output leads (refer to chapter 2.1.4). Balance the individual output current values. Keep connector cables as short as possible, and use the largest possible conductor cross-section. Perform balancing with R

Figure 5.8.2 Wiring for Master-Slave Parallel Connection

Settings

sym

Use the same procedure for additional slave devices. Press the OUTPUT ON key at the slave(s) and the master. Check output current at the slave device displays. Output current at each of the slaves can be precisely matched to master output current by adjusting R

. Changes appear

sym

immediately at the respective display. Undo short-circuiting of the load. From this point on, setting and regulation of (cumulative) output parameters are controlled entirely by the master device. Power-up after initial settings have been made: Devices can be switched on and off in any desired order.

Functional Principle

The master controls output current of the downstream device (slave 1) via the slave’s current control input with the help of the current monitoring signal. Slave 1 functions as a master device for the next downstream slave (slave 2), and so forth. Cumulative output current is thus always proportional to master output current. Outputs can be simultaneously activated and deactivated by connecting the TRG inputs (setting: trG out) in parallel (Figure

5.8.2, optional connection) or in series (see also page 74).

Note:

KONSTANTERs with Differing Nominal Values

The KONSTANTER with the smallest nominal voltage value must always be used as the master device. The voltage setting range of the other KONSTANTERs must be limited to this lowest value with the ULIM parameter. Slave output current Iout

current Iout

as a percentage only, relative to respective

Master

nominal output current I

corresponds to master output

Slave

nom

Example:

Master: SSP 1000-52 U

nom

52 V I

nom

50 A

Settings: USET: 12 V ISET: 15 A (30%)

Slave 1: SSP 1000-52 U

nom

52 V I

nom

50 A

Results in Uout: 12 V Iout: 15 A (30%)

Slave 2: SSP 1000-80 U

nom

80 V I

nom

25 A

Results in Uout: 12 V Iout: 7.5 A (30%)

Initial power-up:

Short circuit the load. Switch master on (mains) and configure settings:

(Pon rcl) If desired

OUTPUT off USET = Uset Desired output voltage ISET = Isoll / n Isoll: Desired cumulative current

n: Number of devices Only valid if nominal data are

identical for all devices, see notes

Switch slave 1 on (mains) and configure: (Pon rcl) If desired

USET > USET

ISET = 0 A The ISET rotary knob can be deactivated if

master

The voltage setpoint at the slave devices must be set at least 1% higher than at the

master device, e.g. to maximum.

desired by setting ILIM to 0 A.

General

A wire connection can be used instead of R

if no precise

sym

setpoint value is required for cumulative output current. In this case, each slave device supplies slightly more current than the master device. If analog interface connector cables and the sensing leads are longer than 1 meter, shielded cable should be used. The shield is connected to the ground terminal on the housing or to –OUT. The master device’s measuring function acquires commonly generated output voltage for all interconnected KONSTANTERs, but only acquires its own output current. The individual measured current values for each of the interconnected KONSTANTERs must be added together in order to arrive at cumulative output current.

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5.9 Series Connection

Analog Interface

+15 V AGND

TRIGGER + TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings: USET1+2 = Uset ISET = Iset OUTPUT on/off

SSP KONSTANTER

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

Device 2

Analog Interface

+15 V

AGND

TRIGGER + TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings: USET1+2 = Uset ISET = Iset OUTPUT on/off

SSP KONSTANTER

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

Device 1

= only required for sensing mode operation

Load

Optional Connection

Ideal working range for current regulation at the load

Ideal working range for voltage regulation at the load

out1

out2

out3

out1Iout2

out3

If output voltage from a single KONSTANTER is insufficient, or if you want to generate a ± voltage, the outputs of several KONSTANTERs can be connected in series.

WARNING!

Maximum allowable cumulative voltage for series connection is 120 V (or 240 V with grounded neutral point).

5.9.1 Direct Series Connection

Caution! If outputs with differing nominal values are series connected, the highest selected current value is present at all outputs in the event of shortcircuit. However, the internal reverse-voltage protection diode is only rated for nominal current of the respective device (see reverse voltage withstand under Electrical Data). For this reason, all current setpoints must be set to the lowest nominal current value of all interconnected devices. The ILIM parameter is used to select this setting.

Functions

The easiest way to supply the consumer with more voltage than is available from a single KONSTANTER. Easy wiring. Less suitable for the constant current regulating mode.

value, current regulating is triggered at the respective output. If load resistance is further reduced, this output maintains constant load current until its output voltage has dropped to 0 V. If even further reduction of load current occurs, the affected output is forced by the other outputs to generate a negative voltage. As of approximately – 0.5 V, the internal reverse-voltage protection diode becomes conductive. Load current can once again climb, until current regulation is activated at the output with the next highest current setpoint value. This procedure is continued until load current triggers current regulating at the output with the highest current setpoint value. Current is held constant by this last output until short-circuiting occurs.

Wiring

Figure 5.9.1a Wiring for Direct Series Connection

Settings

Deactivate all outputs. Adjust the current setpoint ISET of all series connected KONSTANTERs to approximately the same value:

Iset = ISET1 = ISET2 = ISET3 = ISETn

Adjust the voltage setpoints USET such that they add up to the desired cumulative voltage value Uset:

Uset = USET1 + USET2 + USET3 + ... + USETn

Activate the outputs.

Functional Principle

The sum of all individual output voltages is made available to the power consumer. If load resistance is continuously reduced, all of the outputs deliver the same load current at first. When load current reaches the lowest selected current setpoint

Figure 5.9.1b U / I Diagram for Direct Series Connection

Note

Outputs can be simultaneously activated and deactivated by connecting the TRG inputs (setting: trG out) in parallel (Figure

5.9.1a, optional connection) or in series (see also page 74).

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5.9.2 Master-Slave Series Connection

= only required for sensing mode operation

Analog Interface

+15 V

AGND

TRIGGER + TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings: USET = 0 V ISET > Iset master OUTPUT on

SSP KONSTANTER

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

SLAVE

Analog Interface

+15 V

AGND

TRIGGER + TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings: USET = Uset / 2 ISET = Iset OUTPUT on/off

SSP KONSTANTER

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

MASTER

POWER_ON rcl

Load

sym

10 K

Optional Connection

Functions

As opposed to direct series connection, master-slave series connection offers significant advantages:

– Equally suitable for voltage and current regulation – Output parameters (cumulative output voltage, current limiting)

are set entirely by the master device.

– All interconnected KONSTANTERs are equally loaded.

Wiring

Define one power supply as a master device. Connect master and slave devices as shown in Figure 5.9.2. Connect the output leads to the series circuit phase terminals. Balance the individual output voltage values with R

sym

Check output voltage at the device displays. Output voltage at each of the slaves can be precisely matched to master output voltage by adjusting R

. Changes appear

sym

immediately at the respective display. Connect the load. From this point on, setting and regulation of (cumulative) output parameters are controlled entirely by the master device.

Power-up after initial settings have been made:

Devices can be switched on and off in any desired order.

Functional Principle

The master controls output voltage of the downstream KONSTANTER (slave 1) via the slave’s voltage control input with the help of the voltage monitoring signal. In the same way, slave 1 functions as a master for the next downstream device (slave 2) and so forth. Cumulative output voltage is thus always proportional to master output voltage. Outputs can be simultaneously activated and deactivated by connecting the TRG inputs (setting: trG out) in parallel (Figure

5.9.2, optional connection) or in series (see also page 74).

Note:

KONSTANTERs with Differing Nominal Values

The KONSTANTER with the smallest nominal current value must always be used as the master device. The current setting range of the other KONSTANTERs must be limited to this lowest value with the ILIM parameter. Uout

to U

corresponds to Uout

Slave

nom

as a percentage only, relative

Master

Figure 5.9.2 Wiring for Master-Slave Series Connection

Settings

Initial power-up:

Do not load the outputs (idle). Switch master on (mains) and configure settings:

(Pon rcl) If desired

OUTPUT off USET = Uset / n Uset: Cumulative output voltage

n: Number of devices Only valid if nominal data are

identical for all devices, see notes

ISET = Iset Current limit value

Switch slave 1 on and configure: (Pon rcl) If desired

USET = 0 V The USET rotary knob can be deactivated if

ISET > ISET

Use the same procedure for additional slave devices. Press the OUTPUT ON key at the master.

master

desired by setting ULIM to 0 V. The current setpoint at the slave devices

must be set at least 1% higher than at the master device, e.g. to maximum.

Example:

Master: SSP 1000-80 U

80 V I

nom

25 A

Settings: USET: 24 V (30%) ISET:3 A

Slave 1: SSP 1000-52 U

52 V I

nom

50 A

Results in Uout: 15.6 V (30%) Iout:3 A

Slave 2: SSP 1000-52 U

52 V I

nom

50 A

Results in Uout: 15.6 V (30%) Iout:3 A

General

If analog interface connector cables and the sensing leads are longer than 1 meter, shielded cable should be used. The shield is connected to the ground terminal on the housing, or to –OUT. The same current value is available from all KONSTANTERs. For this reason, current measured at the master device only is sufficient for the measurement of load current. The individual measured voltage values for each of the interconnected KONSTANTERs must be added together in order to arrive at cumulative output voltage.

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5.10 Varying the Internal Output Resistance Value

Unom

Inom

U/V

I / A

Iset

Uset













imax

= 1.281 

nom

imax

25.68 k

ext

+25.68 k

;

imax

= 1.251 

nom

imax

24.82 k

ext

+24.82 k

;

Ri / R

imax

0.8

0.6

0.4

0.2

ext

0 20406080 100

[k]

nom

33.12 k

ext



– 25.86 k

nom

31.04 k

ext



– 24.82 k

Analog Interface

+15 V AGND

TRIGGER + TRIGGER 

Uset +

Uset GND

M/S Uset +

Settings:

Load

SSP KONSTANTER

SENSE

+SENSE

U-MONITOR

Iset +

Iset GND

+OUT

I-MONITOR

–OUT

ext

Functions

In the voltage regulating mode, internal output resistance has a value of close to 0 . The internal output resistance value can be increased for certain applications, for example simulation of long output cables or weak automotive batteries. The selected (open-circuit) output voltage is reduced in proportion to increasing load (Figure 5.10a).

Connection

Connect the analog interface as shown in Figure 5.10c. The following relationship between internal resistance R

control resistance R

applies with this wiring configuration:

ext

80 V models:

52 V models:

and

Figure 5.10a Output Voltage Relative to Load

Standardization

The standard characteristic curve shown in Figure 5.10b is valid for all KONSTANTER models. Quick and easy determination indicating which output resistance

correlates to any given control resistance R

is made possible

ext

with the curve.

Ri = R

 display value

imax

80 V models:

52 V models:

Example: U

= 80 V, I

nom

===> R

ext

= 25 A, Ri is 0.5 

nom

= 186.108 k

Figure 5.10c Wiring for Varying Internal Resistance

Tab l e o f R

Device Type R

Values for All KONSTANTER Models

imax

()

imax

62 N 52 RU 25 P 2.602

62 N 52 RU 50 P 1.301

64 N 52 RU 100 P 0.651

64 N 52 RU 150 P 0.434

62 N 80 RU 12.5 P 8.198

62 N 80 RU 25 P 4.099

64 N 80 RU 50 P 2.05

64 N 80 RU 75 P 1.366

Resistance for a Specified Control Resistance

Figure 5.10b Standardized Curve for Determining Internal Output

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6 Operating Commands

Nearly all of the functions of the SSP KONSTANTER can be remote controlled via the IEEE 488 interface (= IEC 625), or the RS 232C interface.

With the exception of a few functions specific to the IEC bus, all device settings and device responses are triggered with character strings which are transmitted in ASCII code. Transmission of device messages is accomplished as follows:

• Byte-serial via the IEC bus with a specific 3-wire handshake

• Bit-serial via the RS 232C interface in consideration of

selected operating parameters ( chapter 4.7.4).

Detailed information regarding the respective data transmission operating modes can be found in the applicable standards, or in the interface description included with your controller.

The layout of device messages complies in general with “Code, Format, Protocol and General Command Accords” in accordance with IEEE 488.2 and IEC 625-2.

Standard commands for programmable instruments (SCPI) used by some manufacturers do not apply to this device.

6.1 Syntax

The commands are named according to the English designations for the corresponding functions. For example, the command:

USET 12

is used to set the output to a voltage value of 12 V. All commands used to query device settings or measured values

are identified with a question mark (?) at the end. Thus the query command:

USET?

is used to determine the presently selected voltage value. Each command consists of a header, and one or more

parameters as required. Differentiation is made between numeric parameters and text parameters. Headers and text parameters can be entered either as upper case or lower case letters, or as a combination of both.

At least one blank must be entered between the header and the parameter.

If several parameters are included they are separated by commas (,), and a blank can be entered before and after each parameter as well.

Examples:

OUTPUT ON Output on START_STOP 20,110

Abbreviated Commands

Commands which can be abbreviated are identified through the use of mixed typefaces. The portion of the command which does not appear in boldface can be left out. However, the question mark (?) must always be transmitted with query commands.

Example 1:

The following abbreviations can be used for the “OUTPUT” setting command:

OUTPUT OUTPU OUTP OUT OU

Example 2:

The following abbreviations can be used for the “DELAY?” query command:

DELAY? DELA? DEL? DE?

Query Commands

All query commands are identified with a question mark (?) at the end. The device makes a response available to the control computer in response to query commands. If the IEEE 488 interface is used, the status byte can be queried or serial polling can be initialized in order to determine whether or not a device message is available. If this is the case, bit 4 (16 decimal) is set in the status byte register (MAV: message available).

Tex t P ar a m e t e r s

Text parameters are parameters which begin with a letter. Selection can be made from a group of text parameters for all commands which use text parameters.

Example:

DISPLAY ON DISPLAY OFF

In the example above, “DISPLAY” is the header, and “ON” and “OFF” are the group of allowable text parameters.

Numeric Parameters

Numeric parameters can be entered as whole numbers, or as fixed or floating decimal point numbers with or without exponent. The exponent can have up to two places, and the entire parameter may not exceed a length 30 places. An upper or a lower case letter can be used for the exponent symbol “E”. A blank can be entered to the left and to the right of the exponent symbol, and the leading plus sign can be left out. If several parameters are included they are separated by commas (,), and a blank can be entered before and after each parameter as well.

Example:

Parameter to be entered: 12.5 (twelve + decimal fraction)

12.5

0012.5

1.25E1 +1.25 E+01

1.25e1

1250.0e -2

Commands per IEEE 488.2 with Asterisk

Standard commands are used for programming device and interface functions included with the SSP KONSTANTER which are described in the IEEE 488.2 (and 625-2) standard.

These commands are identified with an asterisk (*) (2A beginning of the header. The asterisk is part of the header and must be transmitted with the command.

Please read the applicable sections of the specified standard for detailed information concerning these commands.

) at the

Stringing Commands Together

Several commands can be strung together in a row and transmitted as a command string. If several parameters are included they are separated by semicolons (;), and a blank can be entered before and after each semicolon as well.

Example:

USET 10; OUTPUT ON; IOUT?

Comment

The individual commands are executed in the order they were received.

Setting and query commands can be mixed in a single command string.

If a string contains several query commands, semicolons (;) are inserted between the requested parameters in the response string as well.

If a string contains a faulty command, the respective command is ignored, and the corresponding error bit is set in the event standard register (ESR), but all remaining commands are nevertheless executed.

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Terminating Device Messages

a) For IEEE 488 remote control

The following end-of-text characters can be used for data receive:

NL New line = line feed = (0A NL & EOI EOI = end or identify

DAB & EOI DAB = last data byte

The still common end-of-message character combination CR

followed by 0Ah) should no longer be used according

LF (0D

to the standard. Although it is accepted by the device for data receive, it should be used in combination with EOI. The following end-of-message character is used when transmitting the response string:

NL & EOI.

b) For RS 232C remote control

The following end-of-text characters can be used for data receive:

NL (0A CR (0D

) = new line = line feed

) = carriage return

CR LF Carriage return and line feed ETB (17

ETX (03

)

The following end-of-message character is used when transmitting the response string:

NL (0A

) = new line = line feed

)

6.2 IEEE 488 Functions

Abbreviation Term Meaning

SH1 SOURCE HANDSHAKE Handshake source function

AH1 ACCEPTOR HANDSHAKE Handshake sink function

T6 TALKER Talker function with series polling and

L4 LISTENER Listener function with automatic unlisting

TE0 No extended talker function

LE0 No extended listener function

SR1 SERVICE REQUEST Service request function

RL1 REMOTE/LOCAL Switching to and from manual and remote

DC1 DEVICE CLEAR Rest function including selected device clear

PP1 PARALLEL POLL Parallel polling function with remote

DT1 DEVICE TRIGGER Trigger function

C0 No controller function

E1 / 2 Open collector driver

automatic unlisting, without secondary address and without talk-only mode

without secondary address and without listen-only mode

operation, with local lockout

configuring

6.3 Overview

The following table provides an overview of device-specific setting and query commands. A detailed description of the respective device function is included in the next chapter, arranged in alphabetical order.

Command Overview According to Application

IDENTIFICATION / CONFIGURATION

•*IDN?

BASIC FUNCTIONS Extended BASIC FUNCTIONS

Setpoints

•USET

•ISET

•OUTPUT

• POWER_ON

Measured Value Query

•UOUT

•IOUT

•POUT

SEQUENCE and STEP-BY-STEP CONTROL FUNCTIONS

Sequence Control

•SEQUENCE

•START_STOP

• REPETITION

•TDEF

•TSET

Memory Management

•STORE

•*SAV

•*RCL

•*RST

•*SAV

•*RCL

•*LRN

•T_MODE

• DISPLAY

•WAIT

Time Dependent FUNCTIONS, External CONTROL

•T_MODE

•OCP

•DELAY

•*DDT

•*TRG

•WAIT

MONITORING AND PROTECTION Functions

•ULIM

•ILIM

•OVSET

•MINMAX

•UMIN

•UMAX

•IMIN

•IMAX

Special COMMANDS STATUS and EVENT MANAGEMENT

•*TST

•HID_TST

•IFC

•SDC

•DCL

•*WAI

•OCP

•DELAY

•MODE

•CRA

•ERA

•ERB

•*CLS

• *STB, *SRE

•*ESR, *ESE

•*IST, *PRE

•*OPC

• *PSC

Condition and Event Register

•CRA

• ERA, ERAE

• ERB, ERBE

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6.4 Description

All setting, query, register management and interface commands are listed alphabetically in the following pages (*A..., *B..., *C..., ..., A..., B..., C..., ...). In addition to the application-specific overview in the previous chapter, setting, query and status commands are included in the appendix arranged according to function.

*CLS – Clear Status

Functions

The *CLS command Clears all event registers and the status byte register, except for the MAV bit. Any existing service requests are cancelled. Addressing status Unchanged Input and output buffers Unchanged Service request SRQ Cleared Status byte register STB Cleared except for MAV bit Event registers ESR, ERA, ERB Cleared Enable registers ESE, ERAE, ERBE, SRE, PRE Unchanged Set or stored parameters Unchanged

Programming

Programming example (HP Basic):

OUTPUT 712; "*CLS"

*DDT, *DDT? – Define Device Trigger

Functions

A list of commands including up to 80 characters can be entered to a register with the define device trigger command. The command list is executed after receiving the *TRG device message or the IEC bus command GET (GROUP EXECUTE TRIGGER).

Programming a) Setting

Syntax *DDT command[/command][/command] ... | —max. 80 char.—–|

Parameter

Command

All specified device messages (setting and query commands) are allowable except for the *TRG command. Default parameter according to power-on or *RST: DDT register cleared

Comment

In order to prevent the generation of query errors, a blank (space) is returned if the DDT register is empty. The *TRG command may not be entered to the DDT command string. If it were entered it would set bit 4 (EXE, execution error) in the standard event register, and bit 3 (DDTE, define device trigger error) in event register B. If the maximum DDT string length is exceeded, all characters in excess of the allowable number are ignored and an execution error message is generated. The received command list is not checked for correct syntax and limit values until the trigger command is received. If an execution error occurs, the DDT register can be read out with the *DDT? command, but its content cannot be executed (execution error message is generated again). The DDT register is not changed or cleared when the trigger command is executed.

*ESE, *ESE?, ERAE, ERAE?, ERBE, ERBE?, *SRE, *SRE?, *PRE, *PRE? – Enable Registers

Functions

The enable registers determine which bit(s) from the corresponding event or status byte register is/are capable of influencing the respective group message. The respective group message remains set (1 = TRUE), as long as at least one bit which has been enabled to this end has a status of TRUE. This allows for selective enabling or disabling of an SRQ and/or the individual status message “IST” due to an occurred event (masking).

Programming

The device is furnished with five enable registers. They can be written to and read separately. Queries, the *CLS command and device functions do not cause any changes to the contents of these registers. The registers can be cleared by entering a value of “0” (e.g. *ESE 0). The enable registers are non-volatile, and are only cleared by means of device shutdown if the non-volatile PSC flag is set to 1.

Designation Setting Command Query Command

Event standard enable register (ESE) *ESE

Event enable register A (ERAE) ERAE

Event enable register B (ERBE) ERBE

Service request enable register (SRE) *SRE

Parallel poll enable register (PRE) *PRE

n = decimal equivalent of register content (0  n  255).

n *ESE?

n ERAE?

n ERBE?

n *SRE?

n *PRE?

A slash (/) must be used as the delineating character between commands in the DDT string instead of a semicolon (;).

*ESR?, ERA?, ERB? – Event Register Query

Functions

Programming example (HP Basic):

OUTPUT 712;"*DDT USET 10/ISET 5.6/OUT ON" OUTPUT 712;"USET 0" : OUTPUT 712;"*TRG" OUTPUT 712;"USET?; ISET?" ENTER 712;A$ DISP A$ Display: USET +010.000;ISET +005.600

b) Query

The content of the DDT register can be read out with the *DDT? query command. The delineating slashes (/) appear once again as semicolons (;)

The event registers provide information concerning events which have occurred within the device since the last query. They acquire and save status changes which have occurred for specific device functions. The corresponding bit is set to 1 in the event register (1 = TRUE), when the respective function status

– is changed from FALSE to TRUE (for input —|—) or – is changed from TRUE to FALSE (for input

—

\—).

For example, the CME command error bit is set in the ESR event standard register upon receipt of an incorrect programming command. This bit remains set, even if correct commands are subsequently transmitted to the device. The CME bit is not reset until the ESR register is queried.

in the response string. Query command: *DDT? Sample response string: USET 10;ISET 5.6;OUT ON Maximum response string length: 80 characters

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Programming

The device is furnished with three 8-bit event registers, each of which can be individually queried. When an event register is queried, its content is deleted. The *CLS command (CLEAR STATUS) can be used to clear all event registers.

Designation Query Command

Event standard register (ESR) *ESR?

Event register A (ERA) ERA?

Event register B (ERB) ERB?

Each response consists of a whole number 0  n  255, where n corresponds to the decimal equivalent of the content of the respective register.

An enable register is assigned to each event register.

*IDN? – Device Identification Query

Functions

In response to this query, the device identifies itself by providing information regarding manufacturer, type designation, serial number, hardware revision level and firmware revision level.

Applications

This function allows the controller to acquire manually configured device settings, and to use this information for evaluation or for remote configuration via the interface. In this way, for example, a test sequence can first be executed with all involved devices in the manual operating mode. The device settings required for the individual test steps are queried by the controller with the *LRN? command. The response string received by the controller can then be entered to the test program in an unchanged fashion, and can be subsequently transmitted to the respective device as a command string.

Programming

Query command: *LRN? Sample response string:

ULIM +035.000;ILIM +050.000;OVSET +050.0 ;OCP OFF;DELAY 12.00;USET +021.300;ISET +048.000;OUTPUT ON;POWER_ON RST;MINMAX ON;TSET 00.10;TDEF 10.00;REPETITION 000;START_STOP 020,115;T_MODE OUT; DISPLAY OFF

Fixed response string length: 202 characters

Programming

Query command: *IDN? Response string:

manufacturer,type,serial_number,hardware_revision.software_revision

Fixed response string length: 49 characters

Example:

GOSSEN-METRAWATT,SSP62N052RU050P,

EM0000233,03.001

*IST? – Individual Status Query

Functions

– Command for directly querying parallel poll information (see

also chapter 6.2 and table “Query Command for Status and

Events Management” on page 87). – Current status of the device’s IEEE488.1 “IST” message. – Content is not changed by the query. – An ASCII coded byte is returned as a response.

When using the RS232 interface without the IEEE488 interface, value 1 is generally returned as a response.

Programming

Query command: *IST? Response string: 0 : “Local message is false”

1 : “Local message is true”

Length: 1 character, fixed

Example (HP Basic):

OUTPUT 713;"IST?" ENTER 713;A$ DISP A$

 Display: 0

*OPC, *OPC? – Operation Complete Flag Query

Functions

The operation complete flag (OPC) allows for synchronizing the controller and the device in two different ways:

a) The OPC bit is set in the ESR event standard register with the

*OPC command after all previous commands have been

executed. This can be used to generate an SRQ message which synchronizes the controller. Since the SRQ line is only available at the IEC bus, this method cannot be used for programming via the serial interface.

b) In response to the *OPC? query command, “1” is written to the

output buffer and the MAV bit is set in the status byte register after all previous commands have been executed. Synchronization can be accomplished by reading out this response, or – in the case of IEC bus operation – by responding to the SRQ message triggered by the MAV bit, if appropriate masking exists.

Programming a) Setting

Setting command: *OPC Programming example (HP Basic):

OUTPUT 712;"*ESE 1; *SRE 32"

!OPC bit is enabled for SRQ

: : OUTPUT 712;"*CLS 1; *RCL 2; *OPC"

!SRQ is signaled after !recalled device setting from !memory # 2 has been set

b) Query

Query command: *OPC? Response string: 1

The response to the *OPC? query command is always “1”, because it is not processed until all previous commands have been executed.

*LRN? – Complete Configuration Query (LEARN)

Functions

In response to the *LRN? query command, the device supplies a complete list of all adjustable functions along with current parameter settings.

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*PSC, *PSC? – Power-On Status Clear Flag Query

Functions

The power-on status clear flag (PSC) determines whether or not the contents of the non-volatile enable registers will be cleared when the device is shut down.

Programming

The PSC flag can be set and queried:

a) Setting

Setting command: *PSC n

Parameter:

Meaning

0 Enable registers will not be cleared

1 Enable registers will be cleared

b) Query

Query command: *PSC? Response string: "0" or "1"

Comment

The PSC flag setting is retained, even after the device has been switched off or execution of the *CLR command.

*RCL – Recalling Stored Settings

b) Programming

Execution command:

*RCL register number

Example (HP Basic):

OUTPUT 712;"*RCL 1"

! Recall and activate device setting ! from SETUP register 1

Comment

Data can be recalled from registers 11 through 255 during programming, even if the SEQUENCE function has not be initialized. If an attempt is made to open an invalid (empty) register from the SEQUENCE memory, the command cannot be executed. “Err 24” appears briefly at the display and bit 5 (SEQE, SEQence error) is set in event register B (ERB). If the USET or the ISET parameter setting recalled from the SEQUENCE memory exceeds momentarily active ULIM or ILIM soft-limits, execution of the command is aborted, “Err 21” appears briefly at the display and bit 5 (SEQE, SEQence error) is set in event register B (ERB). The RECALL function can also be controlled via the trigger input at the analog interface after selecting device setting T_MODE RCL ( chapter 5.7, page 74).

Functions

Settings which have been previously saved to battery-backed memory with the *SAV command (SAVE) can be recalled and activated with *RCL (RECALL). Differentiation must be made between complete device settings which are saved to register numbers 1 through 10, and USET, ISET and TSET values for the SEQUENCE function which are saved to addresses 011 through

255.

Syntax

*RCL register number

Parameter

Parameter type: number (whole number) Selection can be made from the following alternatives for the register number parameter:

1 through 10 Recalls a parameter set from SETUP memory. Settings stored to the selected register for the following parameters are activated at the device:

USET ISET OVSET ULIM ILIM OUTPUT OCP DELAY MINMAX

TSET TDEF

REPETITION START_STOP Settings for POWER_ON, T_MODE and DISPLAY remain unchanged.

11 through 255 Recalls a parameter set from the SEQUENCE memory. Settings stored to the selected register for the following parameters are activated at the device:

USET ISET TSET All other device settings remain unchanged.

Default setting after RESET (*RST):

a) Manual Operation

See description on page 29.

*RST – Reset Device Settings

Functions

After activating the reset function, the device is returned to its default settings. Addressing status Unchanged Input and output buffers Unchanged Service request SRQ Unchanged Status byte register STB Unchanged Event registers ESR, ERA, ERB Unchanged Enable registers ESE, ERAE, ERBE, SRE, PRE Unchanged Stored parameters

SETUP registers 1 through 10 Unchanged SEQUENCE register Unchanged DDT register Cleared Min-Max memory (UMIN, UMAX, IMIN, IMAX) Reset

Parameter settings Reset to default settings Note: After entering command *RST a waiting time of approx.

30 ms should be observed before entering the next command.

Default settings:

OUTPUT OFF Output deactivated USET 0 Voltage setpoint = 0 V ISET 0 Current setpoint = 0 A OVSET max Max. overvoltage protection trigger value ULIM unom USET limit value = nominal voltage ILIM inom ISET limit value = nominal current OCP OFF Current limiting by means of current regulation DELAY 0 No output off delay MINMAX OFF Storage of measured min-max values disabled TSET 0 (=tdef) SEQUENCE dwell time = default duration SEQUENCE OFF SEQUENCE function deactivated DISPLAY ON Display activated POWER_ON Unchanged T_MODE Unchanged TDEF Unchanged REPETITION Unchanged START_STOP Unchanged

Manual Operation

 Press the <CE/LOCAL> and <ENTER> keys.

Programming

Programming example (HP Basic):

OUTPUT 712; "*RST"

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*SAV – Saving Device Settings

Functions

Current device settings can be saved to battery-backed memory with the *SAV (SAVE) command.

Syntax

*SAV register number

Parameter

Parameter type: number (whole number) Selection can be made from the following alternatives for the register number parameter:

The *SAV 0 command (display for manual operation: “Sto clr”) deletes the contents of the SEQUENCE register from the start address to the stop address.

1 through 10 Current device settings are saved to the selected SETUP register. Each SETUP register includes the following parameters:

USET ISET OVSET ULIM ILIM OUTPUT OCP DELAY MINMAX

TSET TDEF

REPETITION START_STOP

11 through 255 Current settings for the parameters

USET ISET TSET are saved to the selected SEQUENCE register. Default setting after RESET (*RST):

a) Manual Operation

Saving settings to a SETUP register:

See description in chapter 4.10.1.

Saving settings to a SEQUENCE register:

See description in chapter 4.10.2.

Clearing the entire SEQUENCE memory:

See description in chapter 4.10.3.

Deleting a single SEQUENCE register (manual operation only):

See description in chapter 4.10.5.

Adding a memory location (manual operation only):

See description in chapter 4.10.4.

Deleting the contents of a memory location (manual only):

See description in chapter 4.10.6.

All data stored with the SAVE function are retained in batterybacked memory when the device is switched off. Stored settings can be recalled (reactivated) in two different ways:

– *RCL: Recalls an individual setting from the SETUP or the

sequence register

– SEQUENCE GO: Automatic sequential recall of settings from all

sequence registers defined with the START_STOP function.

*STB? – Status Byte Register Query

Functions

The status byte register STB contains – The status of group messages from the three event registers

(bits 2, 3 and 5)

– The status of the output buffer (empty  MAV bit = 0, not

empty  MAV bit = 1)

– The status of MSS group messages masked with the SRE

enable register from internal bits 0 through 5

– Bits 0, 1 and 7 are not used, and are always set to “0”.

When using the RS232 interface without the IEEE488 interface, the invalid value 127 is generally returned as a response.

Programming

a) With the *STB? command:

The response is a data string consisting of a whole number 16  n  127, where n corresponds to the decimal equivalent of the register’s content. With this querying method, the value of n is always  16, because, as a minimum, the response string was saved to the output buffer, and the MAV bit was thus set.

b) By means of serial polling (IEC bus only):

The device responds with its status byte as a “one byte message” in reply to addressed interface command SPE (SERIAL POLL ENABLE). With this querying method, bit 6 indicates the RQS status, and is reset to “0” after completion of serial polling.

The *CLS (CLEAR STATUS) command clears the status byte register except for the MAV bit, and cancels any SRQ messages.

*TRG – Device Trigger Function

Functions

A specified operation can be triggered with the device trigger command, either for an individual device with the *TRG device message, or in combination with other devices and simultaneously by the IEC bus controller with the addressed interface command GET (GROUP EXECUTE TRIGGER). In the case of the SSPKONSTANTER, a command or a list of commands which has been previously defined by means of the *DDT string (DEFINE DEVICE TRIGGER) is executed after these commands.

b) Programming

Execution command:

*SAV register number

Example (HP Basic):

OUTPUT 712;"*SAV 3" ! Save device setting to register 3.

Comment

Data can be saved to SEQUENCE registers 11 through 255 during programming, even if the SEQUENCE function has not be initialized.

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Programming

The device accepts this command:

a) Via both interfaces as a *TRG device message (setting

command) Programming example (HP Basic):

OUTPUT 712;"*TRG"

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b) Via the IEC bus interface as addressed interface command

GET (GROUP EXECUTE TRIGGER) Programming examples (HP Basic):

TRIGGER 712 !triggers the device

!with address 12

TRIGGER 7 !all listener addressed

!devices will be triggered

Comment

If trigger action has not been defined (empty DDT memory), bit 4 (EXE, execution error) is set in the standard event register upon receipt of the device trigger command. The *TRG command may not be used as part of the DDT command. The DDT register is not changed or cleared when the trigger command is executed.

*TST?, HID_TST? – Starting the Self-Test

Functions

Upon receipt of the *TST? or HID_TST? query command, the device starts a self-test and reads out test results to the output buffer as a response string. The *TST? query generates a response of either “0” (= test passed) or “1” (= test failed). The response string for the HID_TST? query consists of a comprehensive list of test results for the individual test steps.

a) ROM Test

The processor acquires the checksum for the ROM module (program memory), and compares it with the specified value. If these two values are not identical, correct functioning of the device cannot be assured and the test failed message appears (FAILED). If this is the case, the device must be tested at a service center and repaired if necessary.

b) RAM Test

RAM modules are tested for defective memory locations. If defective memory locations are detected, correct functioning of the device cannot be assured and the test failed message appears (FAILED). If this is the case, the device must be tested at a service center and repaired if necessary.

c) ADC Timer Test

Analog-digital conversion (ADC) for acquiring measured values is based upon the voltage-frequency conversion principle (VFC). The frequency signal is fed to a counter in the CPU. Gating time is checked at this counter during the ADC timer test. If gating time is not within the prescribed tolerance, measuring function accuracy cannot be assured and the test failed message appears. If this is the case, the device must be tested at a service center and repaired if necessary.

d) DAC/ADC Test

no longer available for firmware version 03.002 and as from March 2004.

Comment

Starting the self-test does not cause any changes to current device settings or stored parameters. The self-test sequence is started immediately after receipt of the corresponding query command and has a duration of approximately 6 seconds. The “READY” LED blinks during the self-test triggered with the HID_TST? command. As long as the test is running, no data can be transmitted to the device and manual operation is disabled.

Programming Notes

Do not transmit the *TST? or HID_TST? command together with other settings and/or query commands in a single string. Enter a waiting period of approximately 6 seconds between transmission of the query commands and read-out of the response string, or in the event of IEC bus operation: Completion of the self-test can be recognize by means of cyclical querying and evaluation of the status byte (serial polling) (test completed  MAV-Bit = 1). The self-test is not influenced by serial polling. If the self-test is failed, the “TSTE” bit is set in event register B. An SRQ is generated in the event of appropriate masking by means of enable registers ERDE and SRE.

*WAI – Wait to Continue

Functions

The *WAI command is of no significance for programming the KONSTANTER. It serves to synchronize the interface protocol in accordance with the IEC 488.2 standard.

CRA? – Condition Register Query

Functions

The condition register provides information concerning the momentary status of specific device functions at the time the query was executed. For example, if the output is switched to constant current regulation, the appropriate CCR bit is set in condition register A (CRA) (condition TRUE —> condition bit = 1). This bit remains set until the current regulating mode is exited. The condition register can be queried as often as desired during this time, without causing any change to its content. The corresponding bit is not reset until the output is no longer operating in the current regulating mode (condition FALSE  condition bit = 0).

Programming

The device is furnished with an 8-bit condition register. It can be read out, but direct overwriting and deletion are not possible.

Triggering and Query via the Interfaces

a) Query command: *TST?

Response string: 0 = test passed

1 = test failed

Fixed response string length: 1 character

Designation Query Command

Condition register A (CRA) CRA?

The response consists of a whole number 0  n  255, where n corresponds to the decimal equivalent of the register’s content.

b) Query command: HID_TST?

Sample response string:

DCL, SDC – Device Clear Function

"X-ROM-TEST PASSED (0B800H); X-RAM-TEST PASSED; ADC-TIMER-TEST PASSED; DAC-ADCTEST PASSED (000000000); END TEST"

Fixed response string length: 111 characters

Functions

The device clear command clears the input and output buffers at the interfaces (e.g. requested data which has not yet been picked up). Interface-internal waiting times and lockouts are cleared. The device is ready to receive data.

Addressing status Unchanged Input and output buffers Cleared

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Service request SRQ Unchanged Status byte register MAV bit = 0, otherwise unchanged Event registers ESR, ERA, ERB Unchanged Enable registers ESE, ERAE, ERBE, SRE, PRE Unchanged Set and stored parameters Unchanged

Programming

The device accepts this command: a) Via both interfaces as device message “DCL” or “SDC” (setting

command) Programming example (HP Basic):

OUTPUT 712;"DCL"

b) Via the IEC bus interface as addressed command SDC

(SELECTED DEVICE CLEAR) Programming example (HP Basic):

CLEAR 712

c) Via the IEC bus interface as universal command DCL (DEVICE

CLEAR) for all bus users Programming example (HP Basic):

CLEAR 7

DELAY – Output Off Delay for OCP

Functions

DELAY defines the delay time which must elapse before the power output is switched off after current regulation has been triggered (IOUT = ISET) with activated OCP function. If output current drops back below the selected ISET value before this delay time has elapsed, the shutdown sequence is aborted and is started again the next time current regulation is triggered. If the OCP function has not been activated, the DELAY setting is of no significance.

Syntax

DELAY value

Parameter

Value

Parameter type: real number Setting range: 00.00 [s] – 99.99 [s] Resolution: 10 ms Default setting after RESET (*RST): 00.00 [s]

a) Manual Operation

See description on page 24.

b) Programming

Setting

Setting command:

DELAY value

Example (HP Basic):

OUTPUT 712;"DELAY 10.7"

!Output off delay: 10.7 seconds

Setting query

Query command:

DELAY?

Response string:

DELAY value

Parameter format value: nn.nn Fixed response string length: 11 characters Example (HP Basic):

OUTPUT 712;"DELAY?" ENTER 712;A$ DISP A$

Display: DELAY 10.70

Comments  page 68 OCP function

DISPLAY, DISPLAY? – Activate / Deactivate Digital Displays

Functions

The 7-segment displays can be deactivated during remote control operation with the DISPLAY function.

Applications

Since displays need not be refreshed when deactivated, slightly shorter measuring and response times can be achieved during interface operation.

Syntax

DISPLAY status

Parameter

Status

One of the following alternatives can be selected from the group of possible text parameters:

Status Description

OFF 7-segment display deactivated ON 7-segment display activated

Default setting after RESET (*RST): ON

Programming Setting

Setting command: DISPLAY status Example (HP Basic):

OUTPUT 712;"DISPLAY OFF"

! deactivate 7-segment display

Setting query Query command:DISPLAY? Response string:DISPLAY status Possible response parameters for status: "OFF" 7-segment display deactivated "ON"7-segment display activated Fixed response string length: 11 characters Example (HP Basic):

OUTPUT 712;"DISPLAY?" ENTER 712;A$ DISP A$

 Display: DISPLAY ON

Comment

If the “REMOTE” operating mode is exited, the 7-segment display is automatically reactivated.

FSET, FSET? – Sequence Function Parameter

Function

In addition to USET, ISET and TSET, FSET is the fourth parameter for defining the sequence memory. It determines which function will be executed upon transition to the respective memory location. Execution of the parameter is only possible during the course of a running sequence (similar to the TSET parameter). When the FSET parameter is transmitted, the current FSET setting is determined and is saved to the respective specification by means of the SAVE n command. The parameters for the FSET command are also part of the STORE command.

Setting Command

Syntax: FSET txt Default setting or after RESET (*RST): NF

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Query Command

Syntax: FSET? Sample response string: FSET NF

Parameter list

Para-

Content Meaning

meter

txt NF SEQUENCE-values USET, ISET, TSET without additional function

RU Voltage ramp, duration TSET or TDEF

RI Current ramp, duration TSET or TDEF

IFC – Resetting the IEC Bus Interface (interface clear)

Functions

The IEC bus interface at the device is re-initialized with the IFC (INTERFACE CLEAR) bus interface command, and is returned to the standard default settings.

Addressing status Not addressed Input and output buffers Unchanged Service request SRQ Unchanged Status byte register STB Unchanged Event registers ESR, ERA, ERB Unchanged Enable registers ESE, ERAE, ERBE, SRE, PRE Unchanged Set and stored parameters Unchanged

Programming

Programming example (HP Basic): ABORT 7

OUTPUT 712;"ILIM 20"

!Current setting range limit: 20 A

Setting query

Query command:

ILIM?

Response string:

ILIM value

Parameter format value: +nnn.nnn Fixed response string length: 13 characters Example (HP Basic):

OUTPUT 712;"ILIM?" ENTER 712;A$ DISP A$

Display: ILIM +020.000

Comment

If an attempt is made to set ILIM to a value lower than ISET, the setting command is not executed and bit 1 is set in event register B (limit error), as is bit 4 in the standard event register (execution error). The ILIM function does not effect the adjustment of ISET by means of a control signal via the analog interface.

IMAX? – Maximum Measured Current Value

Functions

The IMAX function reads out the highest output current value which was measured by the IOUT measuring function and saved to Min-Max memory while the MINMAX function was set to ON.

ILIM, ILIM? Current Setting Limit Value

Functions

ILIM defines the upper setting limit (soft-limit) for current setpoint value ISET. The limit can be used to assure that output current is not inadvertently set above a specified value.

Syntax

ILIM value

Parameter

Value

Parameter type: real number

Device

Typ e

Nom.

Current [A]

12,5 0.00 12.50 0.001 0.01/0.1/1.0

25 0.00 25.00 0.001 0.01/0.1/1.0

50 0.00 50.00 0.001 0.01/0.1/1.0

75 0.00 75.00 0.001 0.01/0.1/1.0

100 0.00 100.0 0.001 0.01/0.1/1.0

150 0.00 150.0 0.001 0.01/0.1/1.0

Default setting after RESET (*RST): nominal current

a. However, ILIM cannot be set to a value of less than the momentary current

setpoint ISET.

b. If the selected value is not a w hole number multiple of the step si ze, it is

rounded off accordingly. If necessary, the numeric value is rounded off once again for the 4-place digital display.

c. Can b e selected b y (r epeatedly) pr essing the <RESOLUTION> key. Th e

blinking decimal place at the display indicates the selected step size.

a) Manual Operation

See description on page 23.

b) Programming

Setting

Setting command:

ILIM value

Example (HP Basic):

Setting Range Step Size

Min.

[A]

Max.

[A]

Remote

[A]

Manual

[A]

Syntax

IMAX?

Measuring range: current measuring range as per IOUT

If the measured current value has exceeded the measuring range limit at least once with the MINMAX function set to ON, “+OL” appears at the display for IMAX and “+999999.” is entered to the data string. The Min-Max memory value can be reset to the momentarily measured value with MINMAX RST (for all 4 parameters at once).

a) Manual Operation

See description on page 28.

b) Programming

Measured Value Query Query command: IMAX? Response string: IMAX value Response parameter format value: ±nnn.nnn Fixed response string length: 13 characters Example (HP Basic): OUTPUT 712;"IMAX?"

ENTER 712;A$ DISP A§

Display: IMAX +045.440

Comment

page 67 MINMAX function

IMIN? – Minimum Measured Current Value

Functions

The IMIN function reads out the lowest output current value which was measured by the IOUT measuring function and saved to MinMax memory while the MINMAX function was set to ON.

Syntax

IMIN?

Measuring range: current measuring range as per IOUT

If the measured current value has fallen below the lower measuring range limit at least once with the MINMAX

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function set to ON, “–OL” appears at the display for IMIN and “–999999.” is entered to the data string. The Min-Max memory value can be reset to the momentarily measured value with MINMAX RST (for all 4 parameters at once).

a) Manual Operation

See description on page 28.

b) Programming

Measured value query Query command: IMIN? Response string: IMIN value Response parameter format value: ±nnn.nnn Fixed response string length: 13 characters Example (HP Basic): OUTPUT 712;"IMIN?"

ENTER 712;A$ DISP A§

Display: IMIN -000.010

Comment

 page 67 MINMAX function

IOUT? – Querying the Momentary Current Value

Functions

The IOUT function triggers measurement of the momentary current value. The measured value is acquired over a period of 40 ms in a continuous fashion.

Syntax

IOUT?

Measuring Range

Device

Typ e

Nom.

Current [A]

12.5 –0.478 13.342 2 2 / 10

25 –0.960 26.685 5 5 / 10

50 –1.92 53.370 10 10

75 –2.880 80.060 10 10

100 –3.840 106.740 20 20 / 100

150 –5.760 160.120 20 20 / 100

a. Measured values which violate the measuring range lower limit are identified

at the display as “–OL”, and in the data string as “–999999.”.

b. Measured val ues wh ich e xceed th e me asuring r ange u pper l imit a re

identified at the display as “+OL”, and in the data string as “+999999.”.

Measuring Range Resolution

Min.

[A]

Max.

[A]

Remote

[mA]

Display

[mA]

Parameter

Value

Parameter type: real number

Device

Typ e

Nom.

Current [A]

12.5 0.00 12.50 0.003125 0.003125/0.0125/0.1

25 0.00 25.00 0.00625 0.00625/0.1/1.0

50 0.00 50.00 0.0125 0.0125/0.1/1.0

75 0.00 75.00 0.02 0.02/0.1/1.0

100 0.00 100.0 0.025 0.025/0.1/1.0

150 0.00 150.0 0.04 0.04/0.2/1.0

Setting Range Step Size

min.

[A]

max.

[A]

Remote

[A]

Manual

[A]

Default setting after RESET (*RST): 0.00 [A]

a. However, ISET cannot be set to a value of greater than the momentary current limit value ILIM. b. If the selected value is not a whole number multiple of the step size, it is rounded off accordingly.

If necessary, the numeric value is rounded off once again for the 4-place digital display.

c. Can be selected by (repeatedly) pressing the <RESOLUTION> key. The blinking decimal place at

the display indicates the selected step size.

The standard display format is: “XX.XX”. The current display format is automatically changed to “X.XXX” for values< 10.00 A for 12.5 A models, and to “XXX.X” for values as of 100 A for 150 A models (manual setting resolution is reduced to 0.2 A as well). The displayed setpoint is rounded off to the display format. Thus if the smallest step size has been selected, minor setpoint adjustments made with the keys or the rotary knob may not be visible at the display.

a) Manual Operation

See description on page 22.

b) Programming

Setting

Setting command: ISET value Example (HP Basic): OUTPUT 712;"ISET 11.3"

!Current setpoint: 11.3 A

Setting query

Query command: ISET? Response string: ISET value Parameter format value: +nnn.nnn Fixed response string length: 13 characters Example (HP Basic): OUTPUT 712;"ISET?"

ENTER 712;A$ DISP A$

Display: ISET +011.300

a) Manual Operation

See description on page 24.

b) Programming

Measured value query Query command: IOUT?

Comments

If an attempt is made to set ISET to a value higher than ILIM, the setting command is not executed and bit 1 is set in event register B (limit error), as is bit 4 in the standard event register (execution error).

Response string: IOUT value Response parameter format value: ±nnn.nnn Fixed response string length: 13 characters

MINMAX, MINMAX? – Min-Max Storage for Measured U and I Values

Example (HP Basic): OUTPUT 712;"IOUT?"

ENTER 712;A$ DISP A§

Display: IOUT +031.510

Functions

The MINMAX function saves minimum and maximum measured voltage and current values to memory. The saved values, UMIN, UMAX, IMIN and IMAX, can then be displayed or queried via the

Comment

interfaces.

page 67 MINMAX function

Syntax

MINMAX status

ISET, ISET? – Current Setpoint

Functions

ISET defines the output current setpoint value.

Syntax

ISET value

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Parameter

Status

One of the following text parameters can be selected:

OFF

Storage of Min-Max values deactivated

Page 68

Storage of Min-Max values activated

RST

Contents of Min-Max memory are reset, i.e. are replaced with the momentary measured value for the corresponding parameter:

Umin = Uout Umax = Uout Imin = Iout Imax = Iout

Default setting after RESET (*RST): OFF

a) Manual Operation

See description on page 28.

b) Programming

Setting

Setting command:MINMAX status Example (HP Basic):

OUTPUT 712;"MINMAX ON;MINMAX RST"

!Activate MINMAX function and !overwrite stored Min-Max values !with momentary measured values

Setting query

Query command:MINMAX? Response string:MINMAX status Possible response parameters (status): "OFF" Storage of Min-Max values deactivated "ON " Storage of Min-Max values activated Fixed response string length: 10 characters Example (HP Basic):

OUTPUT 712;"MINMAX?" ENTER 712;A$ DISP A$

Display: MINMAX ON

Comment

The MINMAX function can be temporarily set to “OFF”, for example before deactivating the output when changing devices under test. Stored values are then no longer updated, nor are they automatically reset. Stored Min-Max values can be read out regardless of the status selected for the MINMAX function. Stored Min-Max values can always be reset with the MINMAX RST command. Stored Min-Max values can also be reset with the *RST command, or with the key combination <CE/LOCAL> + <ENTER> (= RESET). The status of the MINMAX function is saved to the setup registers with the “SAVE” command. If the POWER_ON function is set to “SBY” or “RCL”, the MINMAX function is activated upon power-up, but previously measured Min-Max values are lost when the device is switched off. The MINMAX function can also be controlled via the trigger input at the analog interface ( page 74 T_MODE).

b) Programming

Query command: MODE? Response string: MODE control mode Possible response parameters for mode: "OFF" Output deactivated "CV " Constant voltage regulation "CC " Constant current regulation "OL " Overload (power limiting)

Fixed response string length: 8 characters Example (HP Basic):OUTPUT 712;"MODE?"

ENTER 712;A$ DISP A$

Display: MODE CV

OCP, OCP? – Overcurrent Protection

Functions

The OCP function specifies how the power output will respond if load current climbs to the selected ISET value, i.e. if current regulating is activated at the output.

Applications

As a rule, the OCP function is designed to protect interconnected power consumers in the event of continuous overcurrent, although, for example, intermittently high current is required:

– in order to maintain short response times when increasing

output voltage (capacitor charging current) – as starting current for motors – as in-rush current for capacitive consumers. The OCP function also makes it possible to subject power

consumers to a selectable current value (ISET) for a precisely defined period of time (DELAY), e.g.

– for testing the breaking performance of fuses, circuit breakers,

motor protecting switches etc. – for determining the short-term load capacity of contacts and

cables, as well as electrical and electronic components.

Syntax

OCP status

Parameter

Status

One of the following text parameters can be selected:

OFF

OCP function deactivated: continuous current limiting (current regulation)

OCP function activated: The output is deactivated as soon as the specified DELAY period has elapsed after current limiting is triggered. Default setting after RESET (*RST): OFF

MODE? – Querying the Momentary Control Mode

Functions

The device responds with the momentarily active operating mode (control mode) in response to the MODE? query command.

Applications

In addition to evaluating the CRA condition register, the momentary control mode can be directly queried with MODE?.

Syntax

MODE?

a) Manual Operation

See description on page 26.

b) Programming

Set

Setting command:OCP status Example (HP Basic):

OUTPUT 712;"OCP ON"

!Activate OCP function.

Setting query

Query command:OCP? Response string:OCP status

a) Manual Operation

See description in chapter 3.

Possible response parameters for (status): "OFF" OCP function deactivated "ON" OCP function activated

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Fixed response string length: 7 characters Example (HP Basic):

OUTPUT 712;"OCP?" ENTER 712;A$ DISP A$

Display: OCP OFF

Comment

The setting status of the OCP function is indicated by the yellow “OCP ON” LED at the front panel. Deactivation of the power output initiated by the OCP function is indicated by the red “OCP” LED at the front panel, and bit 3 is simultaneously set in event register A (OCPA, overcurrent protection activated). After OCP shutdown has occurred, the output is reactivated with OUTPUT ON. If the OCP function has been activated and ISET and DELAY have been set to low values, the output may even be deactivated if output voltage is increased. This is due to the fact that charging current for the output capacitor is also acquired by the current regulator, and is limited to a value of Iset – Iload. For this reason, DELAY must be set to a value higher than the resulting output voltage response time.

OUTPUT, OUTPUT? – Activate / Deactivate the Output

Functions

The power output can be activated and deactivated with the OUTPUT function. Activation sequence: Current and voltage values of “0” are specified initially for a period of approximately 2 ms with activated output for transition from the “highly resistive” condition. The output is then adjusted to the selected voltage and current setpoints. Deactivation sequence: Current and voltage setpoints are set to 0 V and 0 A for a period of approximately 350 ms (500 ms for 80 V nominal voltage). The sink is thus activated. The sink discharges the output capacitors as far as possible. The sink is then deactivated so that the output becomes highly resistive for parallel connected direct voltage sources of less than nominal voltage. However, the output terminals are not electrically enabled.

Syntax

OUTPUT status

Parameter

Status

The desired status can be selected with one of the following text parameters:

OFF

Deactivate the output.

Activate the output. Default setting after RESET (*RST): OFF

a) Manual Operation

The power output can be switched on and off by activating the <OUTPUT> key.

b) Programming

Setting Setting command: OUTPUT status Example (HP Basic): OUTPUT 712;"OUT ON"

!Activate output

Setting query Query command: OUTPUT? Response string: OUTPUT status Possible response parameters for (status): "OFF" output deactivated "ON" output activated Fixed response string length: 10 characters

OUTPUT 712;"OUTPUT?" ENTER 712;A$ DISP A$

 Display: OUTPUT ON

Comment

The setting status of the OUTPUT function is indicated by the red “OUTPUT” LED at the front panel.

LED on = output activated

LED off = output deactivated The control mode displays are inactive when the status is set to OUTPUT OFF. If an attempt is made to activate an output which has been disabled by an external trigger signal to the analog interface in the T_MODE OUT operating mode by means of a command or a key operation, the setting command is not executed and bit 4 is set in event register B (output-on error). “Err 25” also appears briefly at the display as a warning in the event of manual operation.

Additional functions which may influence the status of the output include:

– OTP, overtemperature protection ( chapter 3) – OVP, overvoltage protection (

chapter 3

, page 24, page 69)

– OCP in the event of "OCP ON" ( chapter 3, page 26, page 68) – SEQUENCE function ( chapter 4.7.3, page 71) – T_MODE function ( page 29, page 74) – POWER_ON ( page 27, page 70).

OVSET, OVSET? – Overvoltage Protection Trigger Value

Functions

OVSET is used to define the trigger value (threshold) for the overvoltage protection function. If voltage at the output terminals exceeds the selected value, the power output is deactivated.

Syntax

OVSET value

Parameter

Value

Parameter type: real number

Device

Typ e

Nom.

Voltage [V]

40 3.00 50.00 0.1 0.1 / 1.0

52 3.00 62.50 0.1 0.1 / 1.0

80 3.00 100.00 0.1 0.1 / 1.0

Default setting after RESET (*RST): Maximum

a. If th e selected value is not a whole number multiple of the step size, it is

rounded off accordingly. If necessary, the numeric value is rounded off once again for the 4-place digital display.

b. Can be s elected by (repeatedly) pr essing the <RESOL UTION> k ey. The

blinking decimal place at the display indicates the selected step size.

a) Manual Operation

See description on page 24.

b) Programming

Set

Setting command:OVSET value Example (HP Basic):OUTPUT 712;"OVSET 35.0"

!Overvoltage protection trigger value: 35 V

Setting query

Query command:OVSET? Response string:OVSET value Parameter format value: +nnn.n Fixed response string length: 12 characters Example (HP Basic):OUTPUT 712;"OVS?"

Setting Range Step Size

Min.

[V]

Max.

[V]

Remote

[V]

Manual

[V]

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ENTER 712;A$ DISP A$

Display: OVSET +035.0

Comment

Overvoltage protection can be triggered by: –USET  OVSET (due to manual setting, programming

command, memory recall or Uset control signal to the analog

interface) – Sensing leads with reversed polarity – Interrupted output lead during sensing mode operation – Interference from the power consumer – Parallel connected voltage sources – Dynamic output voltage overshooting – Device malfunction or defect

Overvoltage protection triggering is indicated by means of the red OVP LED, and results in immediate deactivation of the output (OUTPUT OFF), as well as disabling of the HF power transmitter and activation of the electronic sink for a period of approximately 350 ms (500 ms for 80 V device) in order to discharge the output capacitor. In addition, bit 4 (OVPA) is set in event register A. Bit 4 remains set in status register A for as long as the trigger value is exceeded. As soon as the shutdown condition no longer exists, the power output can be reactivated by means of OUTPUT ON. The OVSET trigger value should be set at least 1 V higher that the desired output voltage USET in order to prevent undesired triggering of overvoltage protection resulting from overshooting due to sudden output discharging (see values in 1.5.2, Electrical Data). The OVSET trigger value makes reference to the prevailing voltage value between the output terminals of the SSP KONSTANTER. This voltage is increased by the USET parameter during sensing mode operation (remote sensing) by an amount equal to voltage drop at the output leads. For this reason, the above defined difference between OVSET and USET must be correspondingly increased during sensing mode operation. Overvoltage protection response time is less than 200 µs. Output voltage generated by the device may exceed OVSET for the duration of this response time. Maximum overshooting can be approximately calculated as follows:

Uout = ISET [A] x 200 [µs] / C

out

[µF].

ISET = selected current setpoint

= capacitance of the output capacitor

out

 chapter 1.5.3).

Subsequent discharging time for the output capacitor depends upon load, and corresponds to the specified values for response time at U

 1 Volt included in chapter 1.5.3.

nom

POUT? – Querying the Momentary Current Value

Functions

Momentary values for output voltage and output current are acquired by means of the POUT function. These two quantities are multiplied in order to arrive at the measured power value POUT. Approximately 90 ms are required to acquire and process the measured values.

Syntax

POUT?

Measuring Range: Due to the fact that the UOUT and IOUT measuring functions are utilized, the respective measuring ranges apply for power measurements as well. If one or both of the measured quantities UOUT and IOUT violate their respective measuring ranges, the product of POUT (UOUT x IOUT) is displayed as “–OL” or “+OL”, and “–99999.” or “+99999.” is

entered to the response string.

a) Manual Operation

See description on page 24.

b) Programming

Measured Value Query

Query command: POUT? Response string: POUT value Parameter format value: ±nnnn.n Fixed response string length: 12 characters Example (HP Basic): OUTPUT 712;"POUT?"

ENTER 712;A$ DISP A$

Display: POUT +0662.7

Comment

See UOUT and IOUT measuring functions ( page 76, page 67)

POWER_ON, POWER_ON? – Output Switching Status, Response After Power On

Functions

The POWER_ON function determines the status of device settings after mains power has been switched on.

Syntax

POWER_ON status

Parameter

Status

One of the following text parameters can be selected for specification of the desired status:

Status Description

RST RESET:

Defined default settings are utilized ( “Default Settings” in chapter 4.3.5, *RST)

RCL RECALL:

Same settings as prior to last mains shutdown

SBY STANDBY:

Same as RECALL except that the power output remains deactivated (OUTPUT OFF)

Default setting after RESET (*RST): unchanged

a) Manual Operation

See description on page 27.

b) Programming

Setting

Setting command:POWER_ON status Example (HP Basic):

OUTPUT 712;"POWER_ON RST"

! Device is set to default ! settings after power-up.

Setting query

Query command:POWER_ON? Response string:POWER_ON status Possible response parameters for status: "RST" Default settings "RCL" Last used device settings "SBY" Last used device settings, deactivated output Fixed response string length: 12 characters Example (HP Basic):

OUTPUT 712;"POW?" ENTER 712;A$ DISP A$

Display: POWER_ON RST

Comment

The status of the POWER_ON function is not saved as a device setting with the “SAVE” command.

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The following settings are recommended, depending upon how the device is used:

– POWER_ON RST for use in computer controlled systems – POWER_ON RCL for applications which should continue in an

unchanged fashion after mains failures

– POWER_ON SBY for common laboratory use

REPETITION, REPETITION? – Number of Repetitions for SEQUENCE Function

Functions

The REPETITION parameter defines how often a sequence will be repeated, from the start to the stop address.

Syntax

REPETITION number

Parameter

Number

Parameter type: whole number (integer)

Setting Range Description

0 Continuous repetition

1 to 255 Number of sequence repetitions

Default setting after RESET (*RST): unchanged

a) Manual Operation

See description on page 33.

b) Programming

Set

Setting command: REPETITION number Example (HP Basic):OUTPUT 712;"REPETITION 100"

!100 repetitions

Setting query

Query command: REPETITION? Response string: REPETITION number Parameter format number: nnn Fixed response string length: 14 characters Example (HP Basic):OUTPUT 712;"REPETITION?"

ENTER 712;A$ DISP A$

Display: REPETITION 100

Comment

The value selected for the REPETITION parameter is saved to the setup memory as a device setting with the SAVE command.

SEQUENCE, SEQUENCE? – Automatic Sequential Recall of Stored Settings

Functions

The SEQUENCE function allows for automatic sequential recall of USET, ISET and TSET values saved to memory addresses 11 through 255 with the *SAV (save) function in accordance with the TDEF, REPETITION, START and STOP parameter settings selected under SEQUENCE ON.

Syntax

SEQUENCE status

Parameter

Status

The following alternatives are available for the status text parameter:

Status Description

GO Start the SEQUENCE

(condition: SEQUENCE function initialized)

HOLD Pause, suspend sequence at current memory

CONT Resume automatic sequence run with the next valid

STRT

STEP STOP

location

memory location.

Execute the first valid memory location, output is activated, step-by-step control

Execute the next valid memory location

Execute the stop address and end the automatic sequence run or step-by-step control

Default setting after RESET (*RST): STOP is executed for a running sequence and the RDY status becomes active.

* Step-by-step control, similar to external trigger function /

T_MODE RCL

If no executable data have been saved to the stop address, the last setting remains valid and the output is deactivated.

a) Function and manual operation

See explanation on page 34.

b) Programming

Set

Setting command: SEQUENCE status Example (HP Basic) OUTPUT 712;"SEQUENCE GO"

!Start SEQUENCE run.

Setting query

Query command: SEQUENCE? Response string: SEQUENCE txt,n1,n2 Length: 21 characters, fixed Parameter: txt (status)

n1,n2 (number of repetitions, current address)

Possible responses to text: “RUN”, “HOLD”, “RDY”

RUN: active sequence HOLD: sequence suspended RDY: device in initial state

Possible responses for number of repetitions:

000: Device in initial state,

No sequence running

001 ... 255:

Current number of remaining

repetitions

999: Continuous repetition,

no specified number of repetitions

Example (HP Basic):OUTPUT 713;"SEQUENCE?"

ENTER 713;A$ DISP A$

 Display: SEQUENCE RUN,237,111

RUN: active sequence 237: current number of remaining repetitions 111: current address (memory location)

SRQ – Service Request

Functions

The controller is requested to read out specific information regarding device conditions or events by means of the SRQ. The IEC bus is equipped with a common SRQ interrupt line which can be activated by any of the bus users. The conditions under which the SRQ message will be triggered can be selected by the user for the SSP KONSTANTER. Any of the messages which occur in the event registers can be selected, as well as the “message available” message (MAV). Which event message or messages are capable of generating an SRQ message is determined by setting the enable registers accordingly (SRQ masking).

Applications

Example: An SRQ is to be triggered if an incorrect command is received (unrecognized or non-executable):

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Assume that the event registers had an initial value of “0”. After receiving an incorrect command, the device sets either bit 5 (command error CME) or bit 4 (execution error EXE) in the event standard register ESR (see Figure 6.5). Accordingly, bits 4 and 5 must also be set in the respective ESE enable register, so that the ESR group message can be forwarded to the status byte register (STB). The corresponding SRE enable register must in turn be set to TRUE (= 1) at bit 5, so that the MSS group message (master summary status) can be generated by the ESR bit, after which it is then entered to bit 6 of the status byte itself, and indicates that there is at least one reason to generate an SRQ message. The SRQ message is then triggered by the downstream service request function. The respective commands for setting the assumed SRQ conditions are thus: *ESE 48; *SRE 32. Service calls from the ERA and ERB event registers or the MAV message are generated in the same way.

Comment

It is usually advisable to enable at least the following events for SRQ message triggering, because even if only one of these events occurs, the device is no longer capable of executing the desired settings: CME, command error EXE, execution error QYE, query error OTPA, OTP activated TSTE, self-test error LIME, limit error OVPA, OVP activated OCPA, OCP activated PHF, phase failure SEQE, sequence error OUTE, output error DDTE, define device trigger error The setting commands required to this end read as follows:

*ESE 52; ERAE 56; ERBE 190; *SRE 52.

The control computer may execute serial polling at the IEC bus in response to the SRQ message ( chapter 6.2), in order to pinpoint the affected device and determine the reason. If all utilized devices with SRQ capability are equipped with parallel polling as well, it may be possible to identify the device which generated the SRQ message more quickly by means of this function, assuming they have been configured accordingly. The service request function is not available via the RS 232C serial interface, but similar results can be obtained by querying (either cyclically and/or after each data transmission to the device) and evaluating the individual status message (IST) after previously setting the parallel poll enable register (PRE) ( page 60 and page 61).

START_STOP, START_STOP? – Memory Location Start and Stop Addresses for the SEQUENCE Function

Functions

The parameters settings for START and STOP addresses define the beginning and the end of the sequence to be executed. The following applies: start address  stop address.

Syntax

START_STOP start address, stop address

Parameter

Start address, stop address

Parameter type: number (whole number)

Setting Range

Start address 11 through 255 Start address Stop address 11 through 255 Stop address ( start address)

Default setting after RESET (*RST): both unchanged

a) Manual Operation

See description on page 32 ff.

b) Programming

Set

Setting command: START_STOP start address, stop address Example (HP Basic):

OUTPUT 712;"STA 20,115"

! Sequence start = register 20 ! Sequence end = register 115

Setting query

Query command: START_STOP? Response string: START_STOP start address, stop address Parameter format start address, stop address: nnn Fixed response string length: 18 characters Example (HP Basic):

OUTPUT 712;"STA?" ENTER 712;A$ DISP A$

Display: START_STOP 020,115

Comment

In the case of programming via the interface, the start and stop parameters are combined into a single unit: “START_STOP”. If an attempt is made to set the start address to higher value than the stop address, the command is not executed and bit 4 (EXE, execution error) is set in the standard event register ESR. Selected START and STOP address values are saved to setup memory as a device setting with the SAVE command.

STORE, STORE? – Transferring Parameters Directly to Memory

Functions

 The STORE command and its parameters can only be queried

via an interface with appropriate programming.

 It immediately overwrites all values of the memory location with

the new parameter data.

 Memory location contents are not shifted.

Note: If more than 15 STORE commands are to be transmitted in

blocks, a string length of at least 25 characters per command is recommended (see response format for STORE?).

Syntax

STORE n, v1, v2, v3, txt

Parameter

n, v1, v2, v3, txt (memory address, USET, ISET TSET, CLEAR / no function)

Parameter type: integer, real, real, real, character

Setting Range

n 11 through 255 Memory address v1 0  v1  USETmax v2 0  v2  ISETmax v3 TSET: 00.01 [s]  v3  99.99 [s]

txt CLR, NF*, RU*, NC** CLR: deletes the entire memory

* From firmware version 03.004 ** ON, OFF and NC: Setpoints are transferred, the text parameter is

set internally to NC.

Programming Set

Setting command: STORE n, v1, v2, v3, txt

Example (HP Basic):

OUTPUT 713;"STORE 14,15.5,3,9.7,NC"

{overwrite memory location 14 with the following data: Uset = 15.5 V; Iset = 3 A; Tset = 9.7 s; no function}

location regardless of other data)

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Comment

 As opposed to *SAV, the STORE command allows for

significantly faster and more direct programming of the required memory locations for a sequence.

 The txt parameter is optional from this point on. If the txt

parameter is omitted, the comma between the last numeric parameter and the txt parameter is omitted as well. The NC txt parameter is treated like the non-transmitted txt parameter.

 Response to the txt parameter

Transmitted txt Parameter

None or NC*

CLR Any Memory content is deleted

RU Any

Response from SSP32N

Memory Location, Before

Valid setpoints

Empty

Any

* ON, OFF: setpoint values are accepted, an internal text

parameter is set for NC (this is tolerated for compatibility reasons with the SSP32N series)

Memory Location, After

New setpoints are transferred, text parameter remains unchanged

New setpoints are transferred, text parameter is set to NC

SEQUENCE values USET, ISET, TSET without additional function

Voltage ramp, duration TSET and/or TDEF

Current ramp, duration TSET and/or TDEF

c) OUTPUT 713; "STORE? 11,13" ENTER 713; A$ DISP A$

 Display:

STORE 011,+015.000,+003.000,09.70, NC; STORE 012,+010.000,+004.000,01.50, NC; STORE 013,+020.000,+007.000,02.30, NC

Example d) (HP Basic):

OUTPUT 713; "STORE? 11,13,tab" ENTER 713; A$ DISP A$

 Display:

STORE➝011➝+015,000➝+003,000➝09,70➝ NC STORE➝012➝+010,000➝+ STORE➝013➝+

020,000➝+

004,000➝01,50➝NC

007,000➝02,30➝ NC



Significance of delineators:

➝

= ASCII 09h tabulator



= ASCII 0Ah line feed

TDEF, TDEF? – Default Time for SEQUENCE Function

Functions

The TDEF parameter setting defines the dwell time default setting for a voltage-current value pair to be recalled. TDEF is used instead of TSET if TSET has not been set to any specific value, or if it has been set to 00.00 [s].



Setting query

Recall data for address n from sequence or limit value memory:

Programming

Command Value Range Meaning

a Store? Query contents of a memory range from the start

b Store? n n = 11 ... 255 Query contents of memory location n

c Store? n1,n2 n1, n2

= 11 ... 255 n2 n1

d Store? n1,n2,tab n1, n2

= 11 ... 255 n2 n1

address to the stop address (AAA and EEE)

Query contents of a memory range from address n1 to address n2

Query contents of a memory range from address n1 to address n2, delimiter between output parameters: Tabulator character = 09h, decimal point = decimal comma, line break = 0Ah

Query command: a) STORE?

b) STORE? n c) STORE? n1,n2

Response string: a)/c) STORE AAA/n1, v1, v2, v3, txt; ... ;

STORE EEE/n2, v1, v2, v3, txt

b) STORE n, v1, v2, v3, txt

Length: Case b): 37 characters, fixed

Case a)/c): ((n2-n1+1)x38)-1 character

Parameter: n, v1, v2, v3, txt

(nnn,+000.000,+000.000,00.00,CLR) (memory address, USET, ISET TSET,

CLEAR / no function)

If the response is CLR, the queried memory location is empty.

Example b) (HP Basic):

OUTPUT 713; "STORE? 14" ENTER 713; A$ DISP A$

 Display: STORE 014,015.000,003.000,09.70, N C

Example a)/c)

(HP Basic (in case a), start address 11 and stop address 13 apply):

a) OUTPUT 713; "STORE?"

Applications

Use of TDEF is advantageous if one or several identical dwell times occur within a given sequence whose values need to be changed frequently.

Syntax

TDEF value

Parameter

Value

Parameter type: real number

Setting Range: 00.01 [s] – 99.99 [s]

Resolution: 10 ms

Default setting after RESET (*RST): unchanged

a) Manual Operation

See description on page 32.

b) Programming

Set

Setting command: TDEF value Example (HP Basic): OUTPUT 712;"TDEF 5.0"

!Default time: 5 seconds

Setting query

Query command: TDEF? Response string: TDEF value Parameter format value: nn.nn Fixed response string length: 10 characters Example (HP Basic):

OUTPUT 712;"TDEF?" ENTER 712;A$ DISP A$

Display: TDEF 05.00

Comment

The selected TDEF value is saved to setup memory as a device setting with the SAVE command.

See also chapter 4.7.3, SEQUENCE Function.

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T_MODE, T_MODE? – Trigger Input Function Selection

Functions

The T_MODE parameter assigns the floating trigger input with optocoupler (at the analog interface) to a selected device function.

Syntax

T_MODE action

Parameter

Action

Selection can be made from any of the following text parameters:

Action Description

OFF Trigger input function deactivated OUT Trigger input acts upon the OUTPUT: output On/Off RCL RECALL: memory recall (single step) SEQ SEQUENCE: sequential memory recall

LLO LOCAL LOCKED: control panel disabling MIN MINMAX: Min-Max memory for measured values

(SEQUENCE GO)

Default setting after RESET (*RST): unchanged

a. If the SEQUENCE function has not first been initialized, an active trigger signal

results i n e rror me ssage “Er r 27”, wh ich i s di splayed fo r approximately 1 second, and bit 5 (SE QE) is s et in e vent register B (ERB). “RCL” or “SEQ” settings can o nly b e e xecuted i f th e S EQUENCE function has been fully initialized (see page 71).

A detailed description of trigger input functions is included in chapter 5.7.

a) Manual Operation

See description on page 29.

b) Programming

Set

Setting command:

T_MODE action

Example (HP Basic):

OUTPUT 712;"T_MODE LLO"

! Trigger input causes control panel ! disabling / enabling.

TSET, TSET? Dwell Time Specific to Memory Location for the SEQUENCE Function

Functions

The TSET parameter setting defines memory location-specific dwell time for a voltage-current value pair to be recalled. If no specific value or a value of 00.00 [s] is assigned to TSET, TDEF is used as a default value for execution of the sequence function.

Syntax

TSET value

Parameter

Value

Parameter type: real number

Setting Range: 0 (= TDEF) or

00.01 [s] – 99.99 [s]

Resolution: 10 ms

Default setting after RESET (*RST): 0 (= TDEF)

a) Manual Operation

See description on page 31.

b) Programming

Set

Setting command:

TSET value

Example (HP Basic):

OUTPUT 712;"TSET 0.2"

! Specific dwell time: 0.2 seconds

Setting query

Query command:

TSET?

Response string:

TSET value

Parameter format value: nn.nn Fixed response string length: 10 characters Example (HP Basic):

OUTPUT 712;"TSET?" ENTER 712;A$ DISP A$

Display: TSET 00.20

Setting query

Query command:

T_MODE?

Response string:

T_MODE action

Possible response parameters for action:

OFF OUT RCL SEQ LLO MIN

Fixed response string length: 10 characters

Example (HP Basic):

OUTPUT 712;"T_MODE?" ENTER 712;A$ DISP A$

Display: T_MODE LLO

Comment

The status of the T_MODE function is not setting with the “SAVE” command.

Comment

Dwell times of greater than 99.99 seconds per setting can be achieved if total dwell time is distributed to several consecutive sequence registers with identical current and voltage settings. If the selected dwell time for a specific sequence register needs to be read out, the respective register must first be queried from memory with the RCL function. The selected TSET value is also saved to the setup register as a device setting with the SAVE command.

saved as a device

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ULIM, ULIM? – Voltage Setting Limit Value

Syntax

UMAX?

Functions

ULIM defines the upper setting limit (soft-limit) for voltage setpoint value USET. This limit can be used to assure that output voltage is not inadvertently set above a specified value.

Syntax

ULIM value

Parameter

Value

Parameter type: real number

Device

Typ e

Nom.

Voltage [V]

52 0.00 52.00 0.001 0.01/0.1/1.0 80 0.00 80.00 0.001 0.01/0.1/1.0

Setting Range Step Size

Min.

[V]

Max.

[V]

Remote

[V]

Manual

[V]

Default setting after RESET (*RST): Nominal voltage

a. However, ULIM cannot be set to a value of less than the momentary voltage

setpoint USET.

b. If the selected value is not a whole number multiple of the step size, it is

rounded off accordingly. If necessary, the nume ric value is rounded off once again for the 4-place digital display.

c. Can be s elected by (r epeatedly) pr essing the <RESOLUT ION> key. The

blinking decimal place at the display indicates the selected step size.

Measuring Range:

Voltage measuring range as per UOUT

If the measured voltage value has exceeded the upper measuring range limit at least once with the MINMAX function set to ON, “+OL” appears at the display for UMAX and “+999999.” is entered to the data string. The Min-Max memory value can be reset to the momentarily measured value with MINMAX RST (for all 4 parameters at once).

a) Manual Operation

See description on page 28.

b) Programming

Measured Value Query

Query command: UMAX? Response string: UMAX value Response parameter format value: ±nnn.nnn Fixed response string length: 13 characters Example (HP Basic):OUTPUT 712;"UMAX?"

ENTER 712;A$ DISP A§

Display: UMAX +030.450

Comment

 page 67, MINMAX function

UMIN? – Minimum Measured Voltage Value

a) Manual Operation

See description on page 23.

b) Programming

Set

Setting command:

ULIM value

Example (HP Basic):

OUTPUT 712;"ULIM 28"

!Voltage setting limit value: 28 V

Setting query

Query command:

ULIM?

Response string:

ULIM value

Parameter format value: +nnn.nnn Fixed response string length: 13 characters Example (HP Basic):

OUTPUT 712;"ULIM?" ENTER 712;A$ DISP A$

Display: ULIM +028.000

Comment

If an attempt is made to set ULIM to a value lower than USET, the setting command is not executed and bit 1 is set in event register B (limit error), as is bit 4 in the standard event register (execution error). The ULIM function does not effect the adjustment of USET by means of a control signal via the analog interface. However, direct monitoring of maximum output voltage can be configured with overvoltage protection trigger value OVSET ( page 24 OVSET).

Functions

The UMIN function reads out the lowest output voltage value which was measured by the UOUT measuring function and saved to Min-Max memory while the MINMAX function was set to ON.

Syntax

UMIN?

Measuring Range:

Voltage measuring range as per UOUT

If the measured voltage value has fallen below the lower measuring range limit at least once with the MINMAX function set to ON, “–OL” appears at the display for UMAX and “–999999.” is entered to the data string. The Min-Max memory value can be reset to the momentarily measured value with MINMAX RST (for all 4 parameters at once).

a) Manual Operation

See description on page 28.

b) Programming

Measured value query

Query command: UMIN? Response string: UMIN value Response parameter format value: ±nnn.nnn Fixed response string length: 13 characters Example (HP Basic):OUTPUT 712;"UMIN?"

ENTER 712;A$ DISP A§

Display: UMIN -000.000

Comment

 page 67, MINMAX function

UMAX? – Maximum Measured Voltage Value

Functions

The UMAX function reads out the highest output voltage value which was measured by the UOUT measuring function and saved to Min-Max memory while the MINMAX function was set to ON.

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UOUT? – Querying the Momentary Voltage Value

Functions

The UOUT function is used to measure momentary output voltage. The measured value is acquired over a period of 40 ms in a continuous fashion.

Syntax

UOUT?

Measuring Range

Device

Typ e

Nom.

Voltage [V]

52 –2.666 58.770 3.3 10

80 –4.000 88.160 10 10

a. Measured values which violate the measuring range lower limit are identified

at the display as “–OL”, and in the data string as “–999999.”.

b. Measured values which exc eed the mea suring r ange upp er limit ar e

identified at the display as “+OL”, and in the data string as “+999999.”.

Measuring Range Resolution

Min.

[V]

Max.

Response

[V]

String [mV]

Display

[mV]

a) Manual Operation

See description on page 24.

b) Programming

Query command: UOUT? Response string: UOUT value Parameter format value: ±nnn.nnn Fixed response string length: 13 characters Example (HP Basic):OUTPUT 712;"UOUT?"

ENTER 712;A$ DISP A$

Display: UOUT +021.300

Comment

 page 28, ROUND function

USET, USET? – Voltage Setpoint Value

Functions

USET defines the output voltage setpoint value.

Syntax

USET value

Parameter

Value

Parameter type: real number

Device

Typ e

Nom.

Voltage [V]

52 0.00 52.00 0.0167 0.01/0.02/0.1/1.0 80 0.00 80.00 0.02 0.02/0.1/1.0

Default setting after RESET (*RST): 0.00 [Volt]

a. However, USET cannot be set to a value of greater than the momentary voltage limit

value ULIM.

b. If the selected value is not a whole number multiple of the step size, it is rounded off

accordingly.

c. Can be selected by (repeatedly) pressing the <RESOLUTION> key. The blinking decimal

place at the display indicates the selected step size.

Setting Range Step Size

Min.

[V]

Max.

[V]

Remote

[V]

Manual

[V]

Setting query Query command: USET? Response string: USET value Parameter format value: +nnn.nnn Fixed response string length: 13 characters Example (HP Basic):OUTPUT 712;"USET?"

ENTER 712;A$ DISP A$

Display: USET +012.500

Comment

If an attempt is made to set USET to a value higher than ULIM, the setting command is not executed and bit 1 is set in event register B (limit error), as is bit 4 in the standard event register (execution error).

WAIT – Additional Waiting Time

Functions

Additional waiting time between execution of two commands. This function can be used to add additional waiting time within a command string (linked commands) for processing or execution. For example, this allows for defined programming of a specified power-on status / start-up edge within a command string with execution time in the ms range.

Programming

Setting command: WAIT v Parameter: v (value) Parameter type: real number Setting Range: 0.001 <s>  w  9.999 <s>

Resolution: 1 ms

Comment

The length of the command string may not exceed 255 characters (= buffer length), because an unspecified pause would otherwise occur as a result of the additional data transmission.

Attention: Receive data are not processed during waiting time, and the input buffer is disabled, i.e. the display readings are not updated during this time either.

Example

"USET 0; ISET 5; OUTPUT ON; WAIT 0.001; USET 3; WAIT

0.003; USET 7; WAIT 0.003; USET 10"

(or "US 0; IS 5; OU ON; W .001; US 3; W .003; US 7; W .003; US

10" with decoupled command name)

a) Manual Operation

See description on page 22.

b) Programming

Set

Setting command: USET value

Example (HP Basic):OUTPUT 712;"USET 12.5"

!Voltage setpoint value 12.5 V

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6.5 Status and Events Management

DI08

DI07

DI05 DI04 DI03 DI02 DI01

PON

CME

EXE DDE QYE

OPC

SEQI

OTPI OTPA OVPA OCPA

OL CCR CVR

7 6 5 4 3 2 1 0

7 6 5 4

7 6 5 4 3 2 1 0

SEQB TRGA OTPA OVPA

OL CCR CVR

ESR

MAV

ERA ERB

0 0

7 6

3 2 1 0

1 0

1 0 1 0

1 0

1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0

1 0 1 0 1 0 1 0 1 0 1 0

1 0 1 0 1 0 1 0 1 0 1 0 1 0

RQS

MSS

1

Service Request Generation

Parallel Poll Function

DI06

MSS

Service Request Function

rsv

RQS

SRQ

SRQLED

*SRE?

Serial Poll

*STB?

*SRE n

*PRE?

*IST?

ist

*ESE n (0 n 255)

ERAE?ERA?CRA?

ERAE n

ERB?

ERBE?

ERBE n

*OPC

*OPC?

*PRE n

PPC

Command

*ESR?

*ESE?

1 0

*PSC?

*PSCn

(n=0;1)

Clear ESE, SRE, PRE

Condition Register

Event Register

Enable Register

Status Byte Register

Enable Register

Query Command

TRUE = 1 FALSE = 0

Status/Event

Bit no.

Weighting

Setting Command

128

64 32 16

2 1

Power On

Command Error

Execution Error

Query Error

Operation Complete

Message Available

Sequence Busy

Overtemperature

Overload

Overvoltage

Constant Current Regulation

Constant Voltage Regulation

Output disabled by OCP

Parallel Poll

0

Trigger signal at analog interface

TPE TRGA SEQE OUTE DDTE

LIME

0 0

Self-test error / phase failure

Sequence Execution Error

Output-On Error

DDT Error

Limit Error

Trigger signal at analog interface

(0 n 255)

Device Dependent Error

The device is furnished with special registers which can be queried by the controller for the recognition of programming errors (e.g. receipt of an incorrect command), device status (e.g. voltage regulating mode) or separate events (e.g. output has been deactivated by OCP function).

Overview

Figure 6.5 Status and Events Management

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Significance of Register Contents

CCR Output is/was in current regulating mode

CVR Output is/was in voltage regulating mode

CME Unrecognized command, syntax error, standard limit values for numeric

DDTE Define device trigger function error message:

EXE Command-specific parameter limits exceeded, a command or parameter is

LIME Error message after setting command USET, ISET, ULIM, ILIM: An attempt

MAV Error message following a query command: The requested information is

OCPA Output deactivated by OCP function. Reactivate with OUTPUT ON.

OL Overload message: Power limiting has been triggered.

OPC Ready message: Commands preceding the *OPC command have been

OTPA Overtemperature message: The device is overheated, e.g. due to obstructed

OTPI Ready for operation message after OTPA overtemperature message: The

OUTE Error message after OUTPUT ON command: Activation of the output is

OVPA Overvoltage protection has been triggered and the output has been

TPE Error message: Error or mains phase failure detected during self-test (only for

PON The device was switched off for an interim period of time.

QYE Error message after addressing as talker: No message is (yet) available at the

SEQB Status message: Sequence function active (run, hold)

SEQI Ready message: The SEQUENCE has been completed, or was aborted

SEQE Error message after SEQUENCE GO:

TRGA Trigger at analog interface:

n = decimal equivalent of register content (0  n  255).

Meaning

parameters exceeded

– *DDT command string > 80 characters or – *TRG command included in *DDT command string

incompatible with present operating state

has been made – to select a voltage or current setpoint which is higher than the defined limit value, or – to select a limit value which is lower than the momentary voltage or current setpoint.

available at the output buffer. The MAV bit should only be queried by means of serial polling during IEC bus mode operation.

executed (time synchronization).

vents. The output is deactivated 5 seconds after this message appears. The OUTPUT ON setting command is ignored as long as this condition persists, and causes repeated setting of the OTPA bit in the event register.

device has cooled back down. If the POWER ON function is set to standby or reset, the output remains deactivated. If the POWER ON function is set to recall, the output is automatically reactivated.

disabled by an OUTPUT OFF signal at the trigger input of the analog interface. Display: “Err 25”

deactivated. Reactivate with OUTPUT ON.

devices with 3-phase mains connection)

output buffer.

(inactive, ready).

– A voltage or current setpoint value which has been recalled from SEQUENCE memory is higher than the respective limit value (USET > ULIM or ISET > ILIM). Display: “Err 21” or – No executable values exist within the storage area defined by the START and STOP addresses. Display: “Err 22” The SEQUENCE is aborted after the error message appears.

Trigger signal detected at analog interface.

Condition Register ( page 64)

Condition Register A (CRA)

The individual bits of the condition register reflect the momentary status of a specific device function:

0 = condition does not apply (FALSE) 1 = condition applies (TRUE) The content of the condition register can be read out, but direct

overwriting and deletion are not possible. Event Registers ( page 60)

Standard event register (ESR) Event register A (ERA) Event register B (ERB)

The three event registers can be individually queried. When an event register is queried, its content is deleted. Setting command *CLS clears all event registers.

An enable register is assigned to each event register. Enable registers ( page 60)

Standard event enable register (ESE) Event enable register A (ERAE) Event enable register B (ERBE) Service request enable register (SRE) Parallel poll enable register (PRE)

The five enable registers can be written to and read separately. Queries, the *CLS command and device functions do not cause any changes to the contents of these registers. The registers can be cleared by entering a value of “0” (e.g. *ESE 0). Exception: The enable registers are non-volatile, and are only cleared by means of device shutdown if the non-volatile PSC flag is set to 1.

Status Byte Register (STB) ( page 63) The status byte register contains:

– The status of group messages from the three event registers

(bits 2, 3 and 5)

– The status of the output buffer (empty —> MAV (bit 4) = 0, not

empty —> MAV = 1)

– The status of MSS group messages masked with the SRE

enable register from internal bits 2, 3, 4 and 5 (bit 6).

– Bits 0, 1 and 7 are not used, and are always set to “0”.

Register content can be read out: – With the *STB? command, or – With the “serial poll” interface command in the event of IEC bus

operation. If this is the case, bit 6 indicates the RQS status, which is reset (0) after completion of serial polling.

The *CLS command clears the status byte register except for the MAV bit, and cancels any SRQ messages.

Power-On Status Clear Flag (PSC) ( page 62) The power-on status clear flag determines whether or not the contents of the non-volatile enable registers, ESE, SRE and PRE, will be cleared when the device is shut down. The PSC flag can be set and queried: Set: *PSC nn = 0: ESE, SRE and PRE are not cleared

n = 1: ESE, SRE and PRE are cleared

Query: *PSC? response: “0” or “1”

The PSC flag setting is retained, even after the device has been switched off.

Operation Complete Flag (OPC) ( page 61) A ready message can be triggered with the operation complete

flag after one or several transmitted commands have been executed by the device.

The OPC bit is set in the standard event register by means of the *OPC command, because it is not processed until after all previous commands have been executed.

The response to query command *OPC? is always “1”, because it is not processed until all previous commands have been executed.

The event registers acquires and save status changes which have occurred for specific device functions. The corresponding bit is set to 1 in the event register (1 = TRUE), when the respective function status

– is changed from FALSE to TRUE (for input ) or – from FALSE to TRUE (for input ).

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7 Adjusting the SSP KONSTANTER

Warning! The housing cover must be removed in order to balance the device and voltage conducting components are thus exposed. For this reason, the work described in this chapter may only be performed by trained personnel who are familiar with the dangers involved!

Operating the device without connecting the protective conductor is prohibited!

Balancing components:

Tri m Potentiometers

R124 FF I Monitor 0 Current monitor zero-point

R130 FF I Monitor max Current monitor final value

R554 G Uset 0 Voltage setpoint zero-point

R549 G Uset max Voltage setpoint final value

R529 G Iset 0 Current setpoint zero-point

R524 G Iset max Current setpoint final value

R657 A Uout 0 Measured voltage zero-point

R651 A Uout max Measured voltage final value

R669 A lout 0 Measured current zero-point

R663a A lout max Measured current final value

On PCB: Designation Balancing Parameter

Required measuring instruments:

a) For direct voltage measurement

Digital Voltmeter: Uncertainty at Measured Value:

< 0.02 % 40 V / 52 V / 80 V

< 0.02 % 40 ... 150 mV

<0.2 mV 0 ... 10 mV

Input resistance > 1 M

b) For direct current measurement < 1 A

Digital Multimeter: Uncertainty at Measured Value:

< 2 % 10 ... 200 mA

Voltage drop < 1 V

c) For direct current measurement > 1 A

Digital Voltmeter Same as a) plus calibrated shunt resistor:

Device Nominal Current Shunt

12.5 A / 25 A 6 m, 25 A 50 A / 75 A 2 m, 75 A 100 A / 150 A 1 m, 150 A

Overall measuring uncertainty at nominal current: < 0.07 %

Balancing conditions:

Ambient temperature 23  2° C

Relative humidity 20 ... 80% Mains voltage tolerance  3%

Warm-up time 10 minutes

Balancing the I Monitor Zero-Point

Device settings: OUTPUT ON; USET 2.00; ISET 2.00 Output: Idle

– Connect digital voltmeter to I monitor (+) and AGND (–) at

the analog interface.

– Balance measured voltage U

– 5 mV < U

I-Monitor

< + 5 mV

I-Monitor

with R124 to:

Balancing the I Monitor Final Value

Device settings: OUTPUT ON; USET 2.00; ISET = I Output: Shorted with shunt – Connect digital voltmeter as described above and measure

voltage U

– Current I

-Monitor

(-Monitor)

remains constant. Determine current Is by

(must be approx. 10 V).

at shunt Rs is adjusted by turning R130, voltage

measuring shunt voltage Us and balance to:

= I

x U

nom

-Monitor

/ 10 V  0.5%

Balancing the Current Setpoint Zero-Point

Device settings: OUTPUT ON; USET 2.00;

ISET = 0.012 where I = 0.025 where I = 0.050 where I = 0.080 where I = 0.100 where I = 0.160 where I

= 12.5 A

nom

= 25 A = 50 A = 75 A = 100 A = 150 A

Output: shorted with shunt or via ammeter

– Balance measured current I

= ISET  20%

with R529 to:

Balancing the Current Setpoint Final Value

Device settings: OUTPUT ON; USET 2.00; ISET = I Output: Shorted with shunt – Measure current I

Is= 12.50 A ± 25 mA where I = 25.00 A ± 45 mA where I = 50.00 A ± 90 mA where I = 75.00 A ± 210 mA where I = 100.00 A ± 230 mA where I = 150.00 A ± 410 mA where I

at shunt Rs and balance with R524 to:

= 12.5 A

nom

= 25 A

nom

= 50 A

nom

= 75 A

nom

= 100 A

nom

= 150 A

nom

Balancing the Measured Current Zero-Point

Device settings: OUTPUT ON; USET 2.00; ISET 2.00 Output: Idle

– Balance the Iout value which appears at the right-hand

display with R669 to:

– 0.01  Iout  0.006 where I – 0.01  Iout  0.01 where I – 0.01  Iout  0.02 where I – 0.02  Iout  0.02 where I – 0.04  Iout  0.04 where I – 0.04  Iout  0.06 where I

nom

= 12.5 A = 25 A = 50 A = 75 A = 100 A = 150 A

nom

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Balancing the Measured Current Final Value

I monitor max.

I monitor 0

PCB FF

Device settings: OUTPUT ON; USET 2.00; ISET = I Output: Shorted with shunt – Measure current I

at shunt Rs and balance the measured

Iout value which appears at the right-hand display with R663a to: Iout = I

= I = I = I = I = I

 28 mA where I

 58 mA where I

 105 mA where I

 220 mA where I

 300 mA where I

 470 mA where I

nom

= 12.5 A = 25 A = 50 A = 75 A = 100 A = 150 A

Balancing the Voltage Setpoint Zero-Point

Device settings: OUTPUT ON; USET 0.10; ISET 2.00 Output: Idle

– Measure output voltage U

with the digital voltmeter and

balance with R554 to:

100 mV  5 mV where U 100 mV  8 mV where U 100 mV  10 mV where U

nom

= 40 V = 52 V = 80 V

Balancing the Voltage Setpoint Final Value

Device settings: OUTPUT ON; USET = U

= 40.00 V  30 mV where U

= 52.00 V ± 43 mV where U = 80.00 V ± 60 mV where U

nom

; ISET 2.00

nom

= 40 V = 52 V = 80 V

nom

Balancing the Measured Voltage Zero-Point

Device settings: OUTPUT ON; USET 0.00; ISET 0.00 Output: Shorted

– Balance measured voltage value Uout, which appears at the

left-hand display, with R 657 to:

– 0.01  Uout  0.01 where U – 0.02  Uout  0.02 where U

= 40 V

nom

= 80 V or 52

nom

Balancing the Measured Voltage Final Value

Device settings: OUTPUT ON; USET = U

; ISET 2.00

nom

Output: Idle – Connect the digital voltmeter to the output and measure

voltage U

– Balance measured voltage value Uout, which appears at the

left-hand display, with R 651 to: Uout = U

Uout = U Uout = U

 20 mV where U

 23 mV where U

 40 mV where U

nom

= 40 V = 52 V = 80 V

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PCB G

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PCB A

Uout max Uout 0 Iout max Iout 0

82 GMC-I Messtechnik GmbH

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8 Appendix

8.1 Adjustable Functions and Parameters

Setting saved with *SAV n:

Manual setting or via interface

Setting Command Significance / Effect

Manual

IEEE 488

RS 232C

Addr n Set device address for RS 232 or IEEE 488 (interface configuration) X unchanged

bAUd txt Set transmission speed (interface configuration) X unchanged

txt: 50; 75; 150; ... ; 4800; 9600; 19.2t (transmission speed in bits per sec)

dbit txt Set number of data bits (interface configuration) X unchanged

txt: 7; 8

DELAY v Output off delay for OCP

v: 0; 0.01; ... , 99.99 (delay time in seconds)

DISPLAY txt Activate / deactivate the 7-segment displays

txt: ON, OFF (display on, display off = shorter measuring and setting rate via the interface)

FSET txt Sequence function parameter

txt NF / RU / RI

ILIM v Current setting limit (soft-limit)

v: 12.00 (example: 12.00 A)

ISET v Current setpoint

v: 10.75 (example: 10.75 A)

OCP txt Response selection for current limiting (overcurrent protection)

txt: OFF (limiting by means of current regulation)

ON (limiting by deactivating the output after DELAY time elapses)

OUTPUT txt Output On/Off

txt: OFF, ON (output deactivated, output activated)

OVSET v Overvoltage protection trigger value

v: 32.5 (example: 32.5 V)

Pbit txt Set parity bit (interface configuration) X unchanged

txt: nonE no parity bit

ZEro always 0

EVEn even numbered

odd odd numbered

onE always 1

Pon txt Device setting selection after power-up

POWER_ON txt txt: RST (default setting)

RCL (last used settings)

SBY (last used setting, output deactivated)

rEP n Set number of repetitions for the SEQUENCE function

Function-Specific Commands and Device Settings

REPETITION nn:0 (continuous repetition)

1; 2; ... , 255 (number of sequence repetitions)

rnd txt Round off the displayed measured value (setup) X unchanged

txt: 0; –1; –2 (no rounding, round by one or two decimal places)

Sbit txt Set number of stop bits (interface configuration) X unchanged

txt: 1; 2

SEq txt Sequence, automatic memory recall

SEQUENCE txt txt: Go (start); (off, on (close / end, open))

hold (pause/suspend); cont (resume); strt, step, stop (step-by-step control)

Strt m Start and stop memory address for the SEQUENCE function

StoP n m: 11; 12; ... , 255 (start address = beginning of sequence)

START_STOP m, n n: 11; 12; ... , 255 (stop address = end of sequence, n  m)

STORE n, v1, v2, v3, txt Direct transfer of parameter data to memory X X no effect

n: 11; 12; ... ; 255 (memory address)

v1:

voltage setpoint

v2:

current setpoint

v3:

memory location-specific dwell time

txt: NC: no function, CLR: complete deletion of memory location data; NF / Ru / RI

TDEF v Set default time for the SEQUENCE function

(TDEF is used instead of TSET if TSET has not been set to any specific value, or if it has been set to 0.)

v: 0.01; 0.02; ... , 99.99 (delay time in seconds)

X 00.00

XX ON

X X 000.000

XOFF

X OVSETmax

X unchanged

n=1... 10

n=11... 255

Default setting after RESET *RST:

nom

unchanged

running sequence STOP

unchanged

Explanation in chap. on page

p. 38

p. 39

p. 24

p. 65

p. 23

p. 66

p. 22

p. 67

p. 26

p. 68

p. 23

p. 69

p. 24

p. 69

p. 39

p. 27

p. 70

p. 33

p. 71

p. 28

p. 40

p. 34

p. 71

p. 32

p. 72

p. 32

p. 73

GMC-I Messtechnik GmbH 83

Page 84

Setting saved with *SAV n:

Manual setting or via interface

Setting Command Significance / Effect

n=1... 10

Manual

IEEE 488

trG txt Function selection for the trigger input at the analog interface

T_MODE txt txt: OFF (input disabled)

OUT (input deactivates or activates the output (OUTPUT OFF / ON))

RCL (input triggers step-by-step memory recall)

SEQ (input starts or stops sequential memory recall (SEQUENCE GO / STOP))

LLO (input enables or disables front panel controls (LOCAL LOCKED))

MIN (input sets Min-Max storage function (MINMAX OFF / RST or ON))

TSET v Set memory location-specific default time for the SEQUENCE function

v: 0; 0.01; ... , 99.99 (delay time in seconds)

UI_ txt Min-Max storage for measured U and I values

MINMAX txt txt: OFF, ON, RST (min-max value storage off / on / reset)

ULIM v Voltage setting limit (soft-limit)

v: 15.0 (example: 15.0 V)

USET v voltage setpoint

Function-Specific Commands and Device Settings

WAIT v Additional waiting time XX

*CLS Clear status command X X no effect

DCL, SDC DEVICE CLEAR: Clear input and output buffers (all settings and register contents remain unchanged)

*DDT txt DEFINE DEVICE TRIGGER: Definition of function to be executed after receiving the

ERAE n Device dependent event register A enable command X X no effect

ERBE n Device dependent event register B enable command X X no effect

*ESE n Standard event enable command X X no effect

IFC INTERFACE CLEAR: Rest and initialize the IEC bus interface

*OPC Operation complete command X X no effect

*PRE n Parallel poll enable register command X X no effect

*PSC n Power-on status clear command X X no effect

rcl n RECALL: Recall and activate a device setting which has been stored with the *SAV command

*RCL nn:1 ; 2 ; ... , 10 (memory location number)

*RST RESET: Reset device to default settings

v: 12.5 (example: 12.5 V)

v: 0.001;0.002 ... 9,999 (waiting time in seconds)

*TRG command or IEC bus signal GET (group execute trigger)

txt: USET 12 / ISET 8.5 / OUT ON / IOUT? (example)

txt  80 characters, use “/” instead of “;” as a delineator within txt!

(all settings and register contents remain unchanged)

11 ; 12 ; ... , 255 (memory location number, only available with SEQUENCE function set to ON)

General Commands and Settings

*SRE n Service request enable command X X no effect

SRQ Service request X no effect

Sto n SAVE: Save momentary device settings to battery-backed memory

*SAV nn:0 *SAV 0 clears the content of memory locations n1 to n2 by using the address parameters of the

1 ; 2 ; ... , 10 (memory location number)

11 ; 12 ; ... . 255 (location number for SEQUENCE function, only available with SEQUENCE function set to ON)

*TRG TRIGGER: Execute command(s) specified by means of *DDT

*WAI

Wait to continue command X X no effect p. 64

sequence function defined by START_STOP n1, n2

XX DDT memory

n=11... 255

RS 232C

X X unchanged

XOFF

X X 000.000

Default setting after RESET *RST:

unchanged

nominal

cleared

Memory contents unchanged

Explanation in chap. on page

p. 29

p. 74

p. 31

p. 74

p. 27

p. 67

p. 23

p. 75

p. 22

p. 76

p. 60

p. 64

p. 60

p. 66

p. 61

p. 60

p. 62

p. 45

p. 62

p. 47

p. 62

p. 60

p. 71

p. 41

p. 63

Abbreviated commands: Commands can be abbreviated with letters shown in boldface. Letters not printed in boldface can be left out, for example: “OUTPUT ON” = “OU ON” As a rule, letters can be entered in upper or lower case.

Stringing commands together: Several commands is a single data string must be separated by semicolons “;”, for example: “USET 12; ISET 8.5; OUTPUT ON” Numeric parameter formats:

m, n: Whole number (integer)

Whole number, fixed or floating decimal point number with or without exponent, for example:

“12.5”, “0012.5”, “1.25E1”, “+1.25 e+01”

84 GMC-I Messtechnik GmbH

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8.2 Queriable Functions and Parameters

Read out via interface Response string for remote operation

(example):

10 characters 10 characters 10 characters

Front panel

RS 232C

IEEE 488

I Max. measured current value from Min-Max memory [A] X IMAX? XXIMAX +045. 440 13

I_ Min. measured current value from Min-Max memory [A] X IMIN? XXIMIN -000. 010 13

Iout LED Momentary measured current value [A] X IOUT? + display XXIOUT +031. 510 13

CV/CC/Pmax LED Momentary output operating mode (control mode) MODE? CV = constant voltage, CC = constant current X X MODE CV 8

OL = overload, OFF = output deactivated

Pout + Display LED Momentary measured power value [W] X

POUT? XXPOUT +0662 .7 12

Measured Value Query

U UMAX? XXUMAX +021. 310 13

U_ Min. measured voltage value from Min-Max memory [V] X UMIN? XXUMIN +021. 280 13

Uout + Display LED Momentary measured voltage value [V] X UOUT? XXUOUT +021. 300 13

DELAY + Display LED Selected delay time for OCP function X

DELAY? XXDELAY 12.0 0 11 DISPLAY? On-off status of the 7-segment displays X X DISPLAY O N 11

FSEt Sequence function parameter X FSET? XXFSET NF 9

Ilim + Display LED Selected current setting range limit [A] X ILIM? XXILIM +050. 000 13

Iset + Display LED Selected current setpoint value [A] X ISET? XXISET +048. 000 13

UI_ MINMAX? XXMINMAX ON 10

OCP Selected current limiting function X OCP? XXOCP OFF 7

OUTPUT LED Output on-off status OUTPUT? XXOUTPUT ON 10

OVset + Display LED Selected overvoltage protection trigger value [V] X OVSET? XXOVSET +050 .0 12

Pon Selected power-on status X POWER_ON? XXPOWER_ON R ST 12

reP Selected number of repetitions for the SEQUENCE function X REPETITION? XXREPETITION 000 14

READY LED

rcl + rrEP SEQUENCE? XXSEQUENCE H OLD,255,11

Strt Selected start and stop memory addresses for the SEQUENCE function

StoP

Function-Specific Device Queries

START_STOP? XXSTART_STOP 020,115 18

STORE?

STORE? n Recall data from address n from SEQUENCE memory

STORE? n1,n2

STORE? n1,n2,txt

tdEF Selected default time for the SEQUENCE function X TDEF? XXTDEF 10.00 10

trG Selected trigger input function X T_MODE? XXT_MODE OUT 10

tSEt Selected dwell time for the SEQUENCE function X TSET? XXTSET 00.10 10

Ulim + Display LED Selected voltage setting range limit [V] X ULIM? XXULIM +035. 000 13

Uset + Display LED Selected voltage setpoint value [V] X USET? XXUSET +021. 300 13

Max. measured voltage value from Min-Max memory [V] X

Min-max memory enable status X

SEQUENCE function status

Recall data from start address to stop address from SEQUENCE memory

Recall data from address n1 to address n2 from SEQUENCE memory

Recall data from address n1 to address n2 from SEQUENCE memory with tab

n, n1, n2: 11, 12, ... , 255 (memory address), n2  n1, optional txt: tab (optional)

STORE 014, +015.500,+ 003.000,09 .70, NC

Resp. string

length

Explanation

chap.

page

p. 28

p. 66

p. 28

p. 66

p. 24

p. 67

p. 16

p. 68

p. 24

p. 70

p. 28

p. 75

p. 28

p. 75

p. 24

p. 76

p. 24

p. 65

p. 31

p. 65

p. 23

p. 66

p. 22

p. 67

p. 27

p. 67

p. 26

p. 68

p. 23

p. 69

p. 24

p. 69

p. 27

p. 70

p. 33

p. 71

p. 36

p. 30

p. 71

p. 32

p. 72

p. 40

p. 45

p. 72

p. 31

p. 73

p. 29

p. 74

p. 31

p. 74

p. 23

p. 75

p. 22

p. 76

GMC-I Messtechnik GmbH 85

Page 86

Read out via interface Response string for remote operation

(example):

Resp. string

10 characters 10 characters 10 characters

Front panel

RS 232C

IEEE 488

*DDT? DDT function memory content

*IDN? Device ID X X

*LRN? Complete settings X X ULIM +035. 000;ILIM + 050.000;OV 202

(response string for empty memory : “ ” (1 blank space))

(manufacturer, type designation, serial no., hardware and software revision)

General Queries

*TST? Trigger self-test event query (0 = error-free, 1 = faulty) X X 0 1

HID_TST? Start self-test and query results (duration: approx. 5 s) X X

1) Or front panel display selectable / possible

2) LED

3) Strt n or Stop n

4) Status indicated with blinking READY LED, rrep and rcl via <SELECT> key

5) Manual: RCL n and scroll through parameters with [SELECT] key (indirect)

6) in general: length = ((n2-n1+1)x38)-1 character, with n1, n2 also as start/stop address

Terminating device messages:

The following end-of-text characters can be used for data receive:

XXUS 10.5;IS 12;OUT ON ;IOUT?

GOSSEN-METRAWATT,SSP62N052RU05 0P,XXXXXXXXX,03.001

SET +050.0 ;OCP OFF;D ELAY 12.00 ;USET +021 .300;ISET OUTPUT ON;POWER_ON R ST;MINMAX

ON;TSET 0 0.10;TDEF 10.00;REPE TITION 000 ;START_STO P 020,115; T_MODE OUT ;DISPLAY ON

X-ROM-TEST PASSED (0 B800H); XRAM-TEST P ASSED; ADC -TIMER-TES T PASSED; DAC-ADC-TE ST -----(--------- ); END TES T

+048.000;O

length

1 ... 80 p. 60

111

For IEC bus operation: NL (hex: 0A) or NL & EOI or DAB & EOI For RS 232C remote control: NL or CR (hex: 0D) or ETB (hex: 17) or ETX (hex: 03).

The following end-of-message character is used when transmitting the response string:

With IEC bus control: NL & EOI; For RS 232C remote control: last received end-of-message character

Abbreviated commands: Commands can be abbreviated with letters shown in boldface. Letters not printed in boldface can be left out, for example: “OUTPUT ?” = “OU?” As a rule, letters can be entered in upper or lower case. Stringing commands together: Several commands is a single data string must be separated by semicolons “;”, for example: “USET?; ISET?; OUTPUT?”

Explanation

chap.

page

p. 61

p. 64

86 GMC-I Messtechnik GmbH

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8.3 Query Command for Status and Events Management

Read out via interface

Response string for remote operation

RS 232C

IEEE 488

CRA? Condition register A query X X 002 3

D7: SEQB Status message: sequence function active (run, hold)

D6: TRGA Signal at analog interface trigger input

D5: OTPA Overtemperature

D4: OVPA Overvoltage protection triggered

D3: 0

D2: OL Overload

D1: CCR Output in current regulating mode

D0: CVR Output in voltage regulating mode

ERA? Device dependent event register A query X X 032 3

D7: SEQI Sequence function completed (inactive) (ready)

D6: OTPI Ready for operation message after OTPA

D5: OTPA Overtemperature message

D4: OVPA Overvoltage protection triggered

D3: OCPA OCP function triggered:

D2: OL Overload has occurred

D1: CCR Current regulation has occurred

D0: CVR Voltage regulation has occurred

ERAE? Device dependent event register A enable query X X 032 3

ERB? Device dependent event register B query X X 128 3

D7: TPE Self-test error or phase failure

D6: TRGA Signal at analog interface trigger input

D5: SEQE SEQUENCE function error message

D4: OUTE Error message after OUTPUT ON, disabling

via trigger input at analog interface

D3: DDTE Define device trigger function error message

D2: LIME Limit error; ULIM < USET or ILIM < ISET

D1: 0

D0: 0

ERBE? Device dependent event register B enable query X X 128 3

*ESE? Standard event status enable query X X 032 3

*ESR? Standard event status register query X X 144 3

D7: PON Power On

Query Status and Event Registers

*IST? Individual status query X

*OPC? Operation complete query X X 1 1

*PRE? Parallel poll enable register enable query X X 012 3

*PSC? Power-on status clear query X X 0 1

*SRE? Status request enable query X X 012 3

*STB? Read status byte query X

When using the RS232 interfaces without the IEEE488 interface, value 1 is generally returned as a response.

When using the RS232 interface without the IEEE488 interface, the invalid value 127 is generally returned as a response.

D6: 0 (URQ user request)

D5: CME Command Error

D4: EXE Execution Error

D3: DDE Device Dependent Error

D2: QYE Query Error

D1: 0 (RQC request control)

D0: OPC Operation complete

D7: 0

D6: RQS MSS

D5: ESR Standard event register

D4: MAV Message Available

D3: ERA Event register A

D2: ERB Event register B

D1: 0

D0: 0

X0 1

X034 3

(example):

Resp. string

length

Expla-

nation in

chapter

on page

p. 64

p. 60

p. 61

p. 60

p. 62

p. 60

p. 63

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8.4 Overview of Menu Functions

FUNCTION

CE/LOCAL

ENTER

FUNCTION

ENTER

CE/LOCAL

ENTER

Read Out Min-Max Value Memory

88 GMC-I Messtechnik GmbH

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8.5 Memory Structure

Actual Value Query

Setpoint Specification

REPETITION

STOP

START

TDEF

MINMAX

DELAY

OCP

OVSET (OVP)

ILIM

ULIM

OUTPUT

TSET

ISET

USET

SETUP

Memory

Min-Max

Measured

Momen-

Power Off Memory

Default Device Setting

#10

#11 #255

UMAX

UMIN

IMAX

IMIN

UOUT

IOUT

POUT



UOUT > UMAX

UOUT < UMIN

IOUT > IMAX

IOUT < IMIN

*SAV n

*RCL n

*RCL n or SEq Go

SEQUENCE Memory

STORE? n

e.g. USET v

e.g. USET?

STORE n

Mains Power On & Pon rcl / SbY

*RST

Powe r On & Pon r St

Mains Power Off

*SAV n

Active

Device

setting

n = 1 ... 10 n = 11 ... 255

e.g. UMAX?

e.g. UOUT?

T_MODE



Non-volatile memory range

Memory locations can be overwritten

with the “Store” command, or completely

deleted from the start address to the

stop address with the “*SAV 0”

command. The “insert” and “delete”

commands can be used within this

range. The contents of individual memory

locations can be deleted with the “Clear”

command, regardless of how the range

of memory locations has been defined.

Measured

tary

Values

Value

Memory

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8.6 System Messages

Error messages may appear at the digital display immediately after the device is switched on, or after triggering certain functions manually or via remote control .

Code Meaning / Cause Remedy

Err 1 ROM checksum error .

ROM memory test failed.

Err 2 RAM write/read error.

RAM memory test failed.

Err 3 Write/read error.

Initialization of the IEC bus interface failed.

Err 5 An unspecified self-test sub-function

has failed.

Err 7 Serial interface disabled,

impermissible configuration, e.g. 8DB, PE, 2SB, or 7DB, PN, 1SB. The error message is displayed during the power-up routine, or under the “BUS” menu item after each entry.

Err 20 Attempted delete and insert outside of

the defined memory range (from start to stop address).

Err 21 Error message during SEQUENCE

function operation, or after RECALL: The (next) voltage or current setpoint value to be recalled from the SEQUENCE memory is higher than the respective limit value (USET > ULIM or ISET > ILIM). For this reason, memory recall cannot be executed. The SEQUENCE is aborted.

Err 22 Error message after SEQUENCE GO:

No executable values exist within the storage area defined by the START and STOP addresses for the SEQUENCE. The SEQUENCE cannot be started.

Err 24 Attempted recall of an invalid value

(remote: *RCL xxx, where 011  xxx  255).

Err 25 Error message after OUTPUT ON:

Activation of the output is disabled by an OUTPUT OFF signal at the trigger input of the analog interface.

LInE

Error message for series 64 N

FAIL

devices: At least one of the three supply power phases has failed. The output is deactivated immediately after this message is generated, and the device is disabled against further use.

The device must be tested at a service center and repaired if necessary.

Check the contents of the SEQUENCE to be executed, and coordinate setpoints and limit values.

Check the selected START and STOP addresses, as well as the contents (USET, ISET and TSET) of the memory locations defined by these parameters.

In order to activate the output, either the trigger control signal must be set to low, or the effect of the trigger input must be set to another function, after which the OUTPUT ON command must be re-executed.

Switch the device off and inspect for correct connection of supply power at the mains terminals at the back of the device, as well as for correct fuse ratings and intact fuses. Due to the fact that the device us capable of handling the failure of a single phase without affecting operation, this message does not appear until after the failure has persisted for several seconds.

Code Meaning / Cause Remedy

+OL or

Display indicating measuring function

–OL

over-ranging: If a measured output voltage UOUT or output current IOUT violates the specified range (—> chapter 1.5.3), +OL or –OL appears at the display. The appearance of this message always indicates that the specified limit values for output voltage or current have been violated. Examples: UOUT indicates +OL: e.g. caused by overdriving output voltage with an analog control signal applied to the analog interface. UOUT indicates –OL: due to incorrectly connected sensing leads. IOUT indicates +OL: e.g. caused by overdriving output current with an analog control signal applied to the analog interface. POUT indicates +OL: Since POUT is calculated by multiplying UOUT and IOUT, it can be assumed that one of the above listed causes is responsible for this message.

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8.7 Index

Control mode query

LED display . . . . . . . . . . . . . . . . . 17

PC query . . . . . . . . . . . . . . . . . . . 68

Device settings

Current settings

Query from PC Save

From PC

Manual . . . . . . . . . . . . . 41

From setup and sequence memory

Activate

From PC Manual

Reset

From PC . . . . . . . . . . . . . . . 62

Manual

Transfer to / query from sequence

memory

From PC

Digital displays

Switch on/off at PC

Digital trigger

Define device trigger

Trigger . . . . . . . . . . . . . . . . . 63

. . . . . . . . . . . 61

. . . . . . . . . . . . 63

. . . . . . . . . . . . 62

. . . . . . . . . . . . . 45

. . . . . . . . . . . . . . . . . 47

. . . . . . . . . . . . . . . 72

. . . . . . . . . . . 65

. . . . . . . . . . 60

Editing memory

Deleting a memory location

Deleting a memory range . . . . . . . 42

Deleting the contents of a memory lo-

. . . . . . . . . . . . . . 45

cation

Inserting a memory location . . . . . 43

Saving data . . . . . . . . . . . . . . . . . 41

Enabling/disabling front panel controls

. . . . . 44

Gating time . . . . . . . . . . . . . . . . . . .7, 64

Interface

IEEE 488 address selection

IEEE 488 functions . . . . . . . . . . . 59

Installation Set data bits

Set parity bit . . . . . . . . . . . . . . . . 39

Set stop bits

Set transmission speed . . . . . . . . 39

Internal Resistance

Increase for output

. . . . . . . . . . . . . . . . . . 14

. . . . . . . . . . . . . . . . 39

. . . . . . . . . . . . . . . . 40

. . . . . . . . . . . 57

. . . . . 38

Measuring procedure . . . . . . . . . . . . . . 7

Memory structure

Overview . . . . . . . . . . . . . . . . . . . 89

Functions

Overview

MINMAX memory

Display

From PC

Manual . . . . . . . . . . . . . . . . . 28

Edit

. . . . . . . . . . . . . . . 88

. . . . . . . . . . . .66, 75

From PC Manual

. . . . . . . . . . . . . . . 67

. . . . . . . . . . . . . . . . . 27

Operating commands

Abbreviation . . . . . . . . . . . . . . . . 58

List of query commands . . . . . . . 85

List of setting commands List of status and event queries . . 87

Numeric parameters . . . . . . . . . . 58

Overview according to application

Per IEEE 488.2 . . . . . . . . . . . . . . 58

Query . . . . . . . . . . . . . . . . . . . . . 58

Stringing

Syntax . . . . . . . . . . . . . . . . . . . . . 58

Termination

Text parameters . . . . . . . . . . . . . 58

Output current

Measured value

Setpoint

Setting limit

Output power

Display

PC query . . . . . . . . . . . . . . . . . . . 70

Output switching status

Response after power on

Switch / query

Output voltage

Auto-sensing mode Measured value

Setpoint

Setting limit

Overcurrent protection

Activate / deactivate

Functions description . . . . . . . . . 24

Output off delay

Overvoltage protection

From PC Manual

. . . . . . . . . . . . . . . . . . . 58

. . . . . . . . . . . . . . . . . 59

Analog interface

Display . . . . . . . . . . . . . . . . . 24

PC query

From PC Manual

Via analog Interface . . . . . . . 50

From PC

Manual . . . . . . . . . . . . . . . . . 23

. . . . . . . . . . . . . . . 67

. . . . . . . . . . . . . . . . . 22

. . . . . . . . . . . . . . . 66

. . . . . . . . . . . . . . . . . . . . 24

From PC

Manual . . . . . . . . . . . . . . . . . 27

From PC

Manual . . . . . . . . . . . . . . . . . 23

Analog interface Display

PC query . . . . . . . . . . . . . . . 76

From PC

Manual . . . . . . . . . . . . . . . . . 22

Via analog Interface

From PC . . . . . . . . . . . . . . . 75

Manual

From PC

Manual . . . . . . . . . . . . . . . . . 26

From PC

Manual . . . . . . . . . . . . . . . . . 24

. . . . . . . . . . . . . . . 70

. . . . . . . . . . . . . . . 69

. . . . . . . . . . . . . . . . . 24

. . . . . . . . . . . . . . . 76

. . . . . . . . . . . . . . . . . 23

. . . . . . . . . . . . . . . 68

. . . . . . . . . . . . . . . 65

. . . . . . . . . . . . . . . . . . . 69

. . . . . . . . . . . . . . . . . . . . 24

. . . . . . 83

. . . . . . . . . . 51

. . . . . . . . . . . 49

. . . . . . . . . . 51

. . . . . . . 50

Parallel device connection . . . . . . . . . 53

Query device identification . . . . . . . . . 61

Rounding off the displayed measured value

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Sampling rate . . . . . . . . . . . . . . . . . . . . 8

Self-test from PC . . . . . . . . . . . . . . . . 64

Sequence

condensed instructions manual progr.

. . . . . . . . . . . . . . . . . . . 35

Dwell time

Independent of memory location

From PC

Manual . . . . . . . . . . . . . 32

Memory location-specific

From PC Manual

Repetitions

From PC Manual

Sequence control

From PC

Manual . . . . . . . . . . . . . . . . 34

Series device connection . . . . . . . . . . 55

Setpoint

Direct selection

Pre-selected setting . . . . . . . . . . 22

Setting rate

Start address

Status and events management

Stop address

System messages, error messages . . 90

. . . . . . . . . . . . . . . . . . . . . 8

via interface . . . . . . . . . . . . . . . . 83

From PC

Manual . . . . . . . . . . . . . . . . . . . . 32

Condition register query

Delete event registers . . . . . . . . . 60

Device clear function . . . . . . . . . . 64

Enable registers Event register query

Individual status query . . . . . . . . 61

Operation complete query Power-on status clear flag query

Service request . . . . . . . . . . . . . . 71

Status byte register query Wait to continue

From PC

Manual . . . . . . . . . . . . . . . . . . . . 33

. . . . . . . . . . . . . . . . . . . 72

. . . . . . . . . . . . 73

. . . . . . . . . . . . 74

. . . . . . . . . . . . . 31

. . . . . . . . . . . . . . . 71

. . . . . . . . . . . . . . . . 33

. . . . . . . . . . . . . . . 71

. . . . . . . . . . . . . . 21

. . . . . . . 64

. . . . . . . . . . . . . 60

. . . . . . . . . . 60

. . . . . . 61

. 62

. . . . . . 63

. . . . . . . . . . . . . 64

Technical Data . . . . . . . . . . . . . . . . . . . 8

Trigger input Trigger response

Edit

. . . . . . . . . . . . . . . . . . . . 52

From PC

Manual . . . . . . . . . . . . . . . . 29

. . . . . . . . . . . . . . . 74

Waiting time . . . . . . . . . . . . . . . . . . . . 76

GMC-I Messtechnik GmbH 91

Page 92

Edited in Germany • Subject to change without notice • A pdf version is available on the Internet

GMC-I Messtechnik GmbH Südwestpark 15 90449 Nürnberg •

Germany

Phone +49 911 8602-111 Fax +49 911 8602-777 E-Mail info@gossenmetrawatt.com www.gossenmetrawatt.com

9 Order Information

10 Repair and Replacement Parts Service,

Type Description Article Number

62 N 52 RU 25 P SSP-KONSTANTER 500-52 K344A

62 N 52 RU 50 P SSP-KONSTANTER 1000-52 K345A

64 N 52 RU 100 P SSP-KONSTANTER 2000-52 K352A

64 N 52 RU 150 P SSP-KONSTANTER 3000-52 K362A

62 N 80 RU 12,5 P SSP-KONSTANTER 500-80 K341A

62 N 80 RU 25 P SSP-KONSTANTER 1000-80 K343A

64 N 80 RU 50 P SSP-KONSTANTER 2000-80 K351A

64 N 80 RU 75 P SSP-KONSTANTER 3000-80 K361A

IEEE 488/ RS 232 interface

RS 232 interface Option for SSP-62/64N-BZ3 K383A

Option for SSP 62N/64N-BZ3 K382A

Software

Type Designation Article No.

K930D LabView, device driver for SSP KONSTANTER

series 120, 240, 320 and series 500, 1000, 2000, 3000

K930E LabWindows / CVI, device driver for SSP KONSTANTER

series 120, 240, 320 and series 500, 1000, 2000, 3000

K930F HPVEE / VXI PnP, device driver for SSP KONSTANTER

series 120, 240, 320 and series 500, 1000, 2000, 3000

K930D

K930E

K930F

Mounting

Description Note Article No.

RS 232 bus cable, 2 m For connecting a device to an RS 232

interface (extension cable, 9-pin socket / 9-pin plug connector)

IEEE - IEEE bus cable, 2 m For connecting a device to the IEEE 488 bus

system

GTZ3241 000R0001

K931A

Calibration Center* and Rental Instrument Service

If required please contact:

GMC-I Service GmbH Service Center Thomas-Mann-Str. 20 90471 Nuremberg, Germany Phone +49 911 817718-0 Fax +49 911 817718-253 E-mail service@gossenmetrawatt.com

This address is only valid in Germany. Please contact our representatives or subsidiaries for service in other countries.

* Calibration Laboratory for Electrical Quantities

Competent Partner

GMC-I Messtechnik GmbH is certified in accordance with DIN EN ISO 9001:2000. Our DKD calibration lab is accredited by the Deutscher Kalibrierdienst (German Calibration Service) in accordance with DIN EN ISO/ IEC 17025:2005 under registration number DKD–K–19701. We offer a complete range of expertise in the field of metrology: from test

reports and factory calibration certificates, right on up to DKD calibration certificates.

Our spectrum of offerings is rounded out with free test equipment management.

Our service department includes an on-site DKD calibration bench. If errors are discovered during calibration, our specialized personnel are capable of completing repairs using original replacement parts.

As a full service calibration lab, we can calibrate instruments from other manufacturers as well.

DKD – K – 19701 accredited per DIN EN ISO/IEC 17025:2005

Accredited quantities: direct voltage, direct current value, direct current resistance, alternating voltage, alternating current value, alternating current active power, alternating current apparent power, DC power, capacitance, frequency, temperature

11 Product Support

If required please contact:

GMC-I Messtechnik GmbH

Product Support Hotline

Phone +49 911 8602-0 Fax +49 911 8602-709 E-mail support@gossenmetrawatt.com

Gossen Metrawatt SSP 500 Series, SSP 1000 Series, SSP 2000 Series, SSP 3000 Operating Instructions

Specifications and Main Features

Frequently Asked Questions

User Manual

1 Technical Description

1.1 Features and Range of Applications

1.2 Functions

1.3 Options and Accessories

1.4 Functional Principle

1.5 Technical Data

1.5.1 General Data

1.5.2 Mechanical Data

1.5.3 Electrical Data

2 Initial Start-Up

2.1 Preparing for Operation

2.1.2 Installation to 19'' Device Racks

2.1.3 Connection to the Mains

2.1.4 Connecting Power Consumers

2.1.5 Connection to Computer Interfaces

2.2 Switching the Instrument On

3 Controls, Display Elements and Terminals

4 Manual Operation and Device Functions

4.1 Menu Structure

4.2 Setting Output Voltage Uset and Output Current Iset

4.2.1 Direct Selection (rotary knobs and arrow keys)

4.2.2 Pre-selected Setting (ENTER, arrow keys)

4.3 Switching the Power Output On and Off

4.4 Limiting the Allowable Working Range: Ulim, Ilim

4.5 Description of OVP and OCP Protection Functions

4.7 Operating Menu via the FUNCTION Key

4.8.2 Automatic Sequence Run and Step-by-Step Sequence Control

4.8 Settings with the <SELECT> Key

4.8.1 In the Basic Function

4.8.3 Displaying Stored Data Upon Execution of <RCL>

4.9 Setting Resolution with the <RESOL> Key

4.10 Storing Data with the <SAVE> Key

4.10.1 Saving Basic Device Settings

4.10.2 Saving Data to a Memory Location

4.10.3 Clearing the Contents of a Defined Memory Range

4.10.4 Inserting a Memory Location

4.10.5 Deleting a Memory Location

4.10.6 Deleting the Contents of a Memory Location

4.11 Memory Recall with the <RCL> Key

4.11.1 Recall from SETUP Memory

4.11.2 Recall from SEQUENCE Memory

4.14 The <CE/LOCAL> Key

4.12 Disabling Front Panel Controls

4.13 The <ENTER> Key

4.16 Device RESET

4.17 Selecting Remote and Local Control Modes

5 Analog Interface

5.1 Pin Assignments

5.2 Auto-sensing mode

5.3 Regulating Output Voltage

5.4 Regulating Output Current

5.5 Voltage Monitoring Output

5.6 Current Monitoring Output

5.7 Trigger Input

5.8 Parallel Connection

5.8.1 Direct Parallel Connection

5.8.2 Master-Slave Parallel Connection

5.9 Series Connection

5.9.1 Direct Series Connection

5.9.2 Master-Slave Series Connection

5.10 Varying the Internal Output Resistance Value

6 Operating Commands

6.1 Syntax

6.2 IEEE 488 Functions

6.3 Overview

6.4 Description

6.5 Status and Events Management

7 Adjusting the SSP KONSTANTER

8 Appendix

8.1 Adjustable Functions and Parameters

8.2 Queriable Functions and Parameters

8.3 Query Command for Status and Events Management

8.4 Overview of Menu Functions

8.5 Memory Structure

8.6 System Messages

8.7 Index