Gossen MetraWatt SSP 240 Series, SSP 120 Series, SSP 320 Series, SSP 240-20, SSP 120-80 Operating Instructions Manual

...

Operating Instructions

SSP-KONSTANTER 32 N

Series SSP 120, SSP 240 and SSP 320 Programmable Power Supplies

3-349-267-03

12/10.18

2 GMC-I Messtechnik GmbH

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 . . . . . . . . . . . . . . . . . . . . . . . . . . .6

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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

2 Initial Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12

2.1 Preparing for Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .12

2.1.1 Installing the IEEE 488 Interface Module . . . . . . . . . . . . .12

2.1.2 Installation to 19'' Device Racks . . . . . . . . . . . . . . . . . . .12

2.1.3 Combining Benchtop Devices . . . . . . . . . . . . . . . . . . . . .13

2.1.4 Connection to the Mains . . . . . . . . . . . . . . . . . . . . . . . . .13

2.1.5 Connecting Power Consumers. . . . . . . . . . . . . . . . . . . . .13

2.1.6 Connection to Computer Interfaces . . . . . . . . . . . . . . . . . 13

2.2 Switching the Instrument On . . . . . . . . . . . . . . . . . . . . . . .14

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

4.15 Device RESET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .47

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

4.16

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

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

5.2 Auto-Sensing Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

5.3 Status Signal Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . .49

5.4 Regulating Output Voltage . . . . . . . . . . . . . . . . . . . . . . . .50

5.5 Regulating Output Current . . . . . . . . . . . . . . . . . . . . . . . .50

5.6 Voltage Monitoring Output . . . . . . . . . . . . . . . . . . . . . . . .51

5.7 Current Monitoring Output . . . . . . . . . . . . . . . . . . . . . . . .51

5.8 Trigger Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

5.9 Parallel Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52

5.9.1 Direct Parallel Connection . . . . . . . . . . . . . . . . . . . . . . . .52

5.9.2 Master-Slave Parallel Connection . . . . . . . . . . . . . . . . . .54

5.10 Series Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55

5.10.1 Direct Series Connection. . . . . . . . . . . . . . . . . . . . . . . . .55

5.10.2 Master-Slave Series Connection . . . . . . . . . . . . . . . . . . .56

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

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

4 Manual Operation and Device Functions . . . . . . . . . . . .20

4.1 Menu Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

4.2 Setting Output Voltage and Output Current . . . . . . . . . . . . . 20

4.2.1 Direct Selection (rotary knobs and scroll keys) . . . . . . . . .20

4.2.2 Pre-selected Setting (ENTER, scroll keys) . . . . . . . . . . . .21

Switching the Power Output On and Off . . . . . . . . . . . . . . . . . . . .21

4.3

4.4

Limiting the Allowable Working Range: Ulim, Ilim . . . . . . . . . . . . .22

4.5 Description of OVP and OCP Protection Functions. . . . . . . .22

4.6 Display of Momentary Output Values Uout, Iout and Pout. . .23

4.7 Operating Menu via the FUNCTION Key . . . . . . . . . . . . . . .23

4.7.1 SET – “Setup” Function Group . . . . . . . . . . . . . . . . . . . .25

4.7.2 AnIF – “Analog Interface” Function Group . . . . . . . . . . . .28

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

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

4.8.2

4.8.3

4.8.4 Setting Resolution with the <SELECT> Key . . . . . . . . . . .41

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

4.9.1 Saving Basic Device Settings. . . . . . . . . . . . . . . . . . . . . .41

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

4.9.3

4.9.4 Inserting a Memory Location . . . . . . . . . . . . . . . . . . . . .43

4.9.5 Deleting a Memory Location . . . . . . . . . . . . . . . . . . . . . .44

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

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

4.10.1 Recall from SETUP Memory. . . . . . . . . . . . . . . . . . . . . . .45

4.10.2 Recall from SEQUENCE Memory . . . . . . . . . . . . . . . . . . .46

4.11 Disabling Front Panel Controls . . . . . . . . . . . . . . . . . . . . .46

4.12 <The ENTER> Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .46

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

During a Sequence Run and with Step-by-Step Control. . . . . . . .40

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

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

. . . . . . . . . . . . . . . . . . . . . .40

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

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

6.2 IEEE 488 Functions . . . . . . . . . . . . . . . . . . . . . . . . . . .60

6.3 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60

6.4 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .61

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

7 Adjusting the SSP KONSTANTER

CAL – “Calibration” Function Group . . . . . . . . . . . . . . . .79

7.1 General Information and Definition of Terms . . . . . . . . . . . .79

7.2 Adjusting Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

7.3 Self-Test Triggering . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

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

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

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

8.3 Query Commands for Status and Events Management . .86

8.4 Overview of Menu Functions . . . . . . . . . . . . . . . . . . . . .87

8.5 Memory Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .88

8.6 Indication of Operating States . . . . . . . . . . . . . . . . . . . . . .89

8.7 System Messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

8.6 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .91

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

10 Repair and Replacement Parts Service,

Calibration Center* and Rental Service . . . . . . . . . . . . .92

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

GMC-I Messtechnik GmbH 3

I Initial Inspection

Important Warnings

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

Unpacking

Great care must be exercised when removing the electronic device from the package.

☞ Pull the KONSTANTER from its package. ☞ In doing so, do not grasp rotary knobs, terminals or jacks in

order to avoid damage.

☞ Do not allow the KONSTANTER to fall out of the packaging.

Controls, displays, terminals and internal components might otherwise be damaged.

☞ Do not, under any circumstances, touch the KONSTANTER’s

electrical terminals before grounding yourself to the housing in order to neutralize potential differences. Sensitive electronic circuitry might otherwise be damaged as a result of electrostatic discharge.

☞ 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 (see chapter 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 under “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:

ATTENTION!

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 it into a source of danger. Intentional interruption is prohibited.

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.

WARNING II – Impaired Safety

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

☞ If the KONSTANTER demonstrates visible damage ☞ If the KONSTANTER no longer functions ☞ 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 is connected to supply 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 is connected to supply 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 must be disconnected from all external voltage sources before work of this type is performed, in as far as this is possible. A five 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.).

Significance of Symbols

Indicates EC conformity

Observe EGB directives Warning concerning a source of danger

(attention: observe documentation!)

4 GMC-I Messtechnik GmbH

1 Technical Description

1.1 Features and Range of Applications

Depending upon where they are used and prevailing local conditions, electrical and electronic devices may be subject to significant supply power fluctuation in the absence of stabilizing and back-up systems. Automotive electrical system voltage characteristics during starter motor operation offer a typical example. R&D, production and test departments must be able to assure that electrical equipment is capable of executing all required functions under these types of conditions.

Type SSP 120, SSP 240 and SSP 320 KONSTANTER power supplies from GMC-I Messtechnik GmbH support users in fulfilling this objective.

In particular in automated test systems for routine testing, SSP KONSTANTERs are capable of high throughput rates. Short response times assure accurate emulation of rapidly changing voltage and current characteristics. Power consumer characteristics relative to dynamic supply power can thus be tested and simulated very easily.

The integrated calibration procedure and the included calibration

certificate are especially important for use in production and testing departments which are certified in accordance with ISO 9000.

SSP KONSTANTERs (single output system power supplies are programmable, voltage and current regulated DC power supplies with 120, 240 or 320 W of output power.

They are microprocessor controlled, and are furnished with an addressable RS 232C serial interface as standard equipment. Up to 30 KONSTANTERs can thus be controlled from a single PC port.

An IEEE 488 interface can be integrated as an option. Complete control of all device functions, as well as querying of measured values, setting parameters and device statuses is possible via both interfaces.

Manual adjustment of voltage and current is accomplished by means of two rotary pulse encoders with selectable adjusting sensitivity.

Two 4-place multifunction displays are used for precision read-out of measured values (V, A and W), as well as for menu-driven configuration of numerous additional functions such as limiting setting ranges, overvoltage protection, overcurrent shutdown delay and programmable, digital signal inputs and outputs.

Up to 243 settings can be saved to memory and recalled either individually or sequentially, for example in order to generate specific voltage or current characteristics. And innovative circuit technology allows for nearly load independent response times of less than 1 ms. Output parameters can thus be superimposed with AC signal right up into the kHz range via the analog interface which is furnished as standard equipment.

The measuring function includes a Min-Max value memory, limit monitoring signals and a HOLD function.

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 shutdown ❑ Start-up performance (power-on status) ❑ Reset device settings ❑ Save / recall device settings ❑ Save / recall setting sequences ❑ Sequence definition ❑ Trigger input function selection ❑ Function selection for digital control inputs ❑ Operating parameters for the measuring function (Min-Max

value memory, limit monitoring, display resolution)

❑ Initialize calibration procedure ❑ Initialize self-test ❑ Operating parameters for computer interfaces (device

address, SRQ masks, transmission speed etc.)

Display functions:

❑ Momentary measured voltage, current and power values ❑ Minimum and maximum measured voltage and current

values

❑ Current device settings (individual or complete) ❑ Current operating status (control mode, overtemperature,

busy)

❑ Occurred events (mains or phase failure, overtemperature,

overvoltage, overload, programming error)

❑ Memory contents ❑ Device ID ❑ Calibration date

Protective Functions and Additional Functions

❑ Sensing terminals protected against polarity reversal and

automatic switching to auto-sensing

❑ Control panel disabling ❑ Output overvoltage protection ❑ Output protected against reverse polarity ❑ Overtemperature protection ❑ Backup battery for device settings memory ❑ Master-slave series operation ❑ Inrush current limiting ❑ Temperature controlled fans (with 240 and 320 W models)

GMC-I Messtechnik GmbH 5

1.3 Options and Accessories

1.4 Functional Principle

Options

(See order information on last page.)

Devices can be equipped with an IEEE 488 plug-in interface module for integration of SSP KONSTANTERs into IEC bus controlled systems.

The interface is in compliance with requirements set forth in the IEEE488.2 standard (IEC 625-2), and is frequently designated as a GPIB (general purpose interface bus) or an HP-IB (Hewlett Packard interface bus).

Programming of all device functions, as well as querying measured and configured parameters, is possible via the interface. Several specific interface functions are also provided.

The interface option is supplied as a separate plug-in module for easy, subsequent installation to the KONSTANTER.

Included accessories:

The following accessories are included with the SSP KONSTANTER:

❑ These operating instructions ❑ 1 mains power cable with earthing contact plug

(approx. 1½ meters)

Additionally available accessories:

(See order information on last page.)

❑ 19" rack adapter, 1 x 32 N

required for installation of one series SSP 32 N or SLP 32 N KONSTANTER to a 19" rack

❑ 19" rack adapter, 2 x 32 N

required for installation of two series SSP 32 N or SLP 32 N KONSTANTERs to a 19" rack

❑ Mains jumper cable, 0.4 meters

The cable is equipped with a 10 A inlet plug and a 10 A inlet socket. It is used for looping mains power through when several KONSTANTERs are mechanically combined into a multi-channel unit. In this way, the complete unit requires only one mains power cable.

❑ RS 232 bus cable, 2 meters

For connecting one KONSTANTER to an RS 232 interface. (extension cable, 9-pin socket / 9-pin plug connector)

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.

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

Operation

Generally speaking, all of the functions of the SSP KONSTANTER can be controlled with the adjusting elements at the front panel, via the RS 232 interface or via the optional IEEE 488 plug-in interface module.

Displays and Control Panel

Both 4-place 7-segment displays and the individual LEDs are controlled statically by the processor via the registers. Front panel key operations are processed by means of a group interrupt and subsequent direct querying. The rotary pulse encoders control the increment and decrement counters depending upon the direction of rotation. Each time an adjusting element is activated, an interrupt occurs at the CPU which then causes an appropriate response.

Interface Option

The SSP KONSTANTER with installed interface module allows for control via the IEEE 488 bus in addition to serial operation.

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.

6 GMC-I Messtechnik GmbH

Setup Procedure

Setup data are processed and forwarded to the respective I/O controller of the respective function unit. 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 sensing terminals. Actual output current is acquired as a voltage drop at a shunt situated 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 15 W continuous power). The sink function is implemented by means of BET technology (bidirectional energy transfer). This technology assures charging and discharging of the output capacitor within an equally short period of time, even at no-load operation. The sink function is activated as soon as, and for 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 functions are enabled when the output On / Off status is set to ON, and the source function is disabled when the status is set to Off, in which case the sink function is deactivated after approximately 300 ms (highly resistive output).

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 converter, controlled directly by the CPU, functions in accordance with the dual-slope principle and traces measured value acquirement back to a time measurement (meter reading). The actually measured decimal value is calculated based upon this data, and is stored to RAM. 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 interfaces’ 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 operation 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

After bypassing the voltage monitor, 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 (“CV” LED blinks, status and events registers).

– Overcurrent Monitoring

Overcurrent monitoring can be activated and deactivated. Response time is defined with the delay parameter. If, with activated OCP function, the device is in the current regulating mode for at least the duration of the selected delay time (“CC” LED is illuminated), the power output is switched off and an OCP message is generated (“CC” LED blinks, status and events registers).

–Temperature Monitoring

Temperature is acquired by means of PTC resistors at representative points (circuit breaker heat sink), and is converted into a proportional electrical signal. As of an initial threshold temperature of approximately 70C, fan voltage is increased in a linear fashion as temperature increases. The device can be operated at any output load up to the maximum specified operating temperature after the fan has been activated. If ventilation is impeded, or at excessive ambient temperatures, temperature at the sensor may reach the upper threshold of approximately 90C. If this is the case, an overtemperature message is entered to the status and event registers. The output is deactivated by the CPU after 5 seconds, and OTP triggering is indicated by the blinking “Pmax” LED. 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.

GMC-I Messtechnik GmbH 7

1.5 Technical Data

U/V

nom

I / A

nom

0.5 I

nom

Short-Term Working Range

Voltage Setting

Current Setting

0.5

nom

Range

380.5

14 88

221.5

Dimensions in millimeter

1.5.1 General Data

Power Supply

Connection Input: 10 A IEC inlet plug

Output: 10 A IEC inlet socket,

Line voltage 230 V ~ +10 -15%, 47 to 63 Hz Power consumption See chapter 1.4.3

Inrush Current Max. 50 A Mains fuse 1 ea. T 4 A / 250 V (6.3 x 32 mm, UL)

internal: 1 ea. T 5 A 250 V (5 x 20 mm)

Output

Connection

Output Front panel, 2 ea. 4 mm safety jacks

Rear , 6-pole plug-in screw terminal block

Sensor Rear panel, included in 6-pole plug-in

screw terminal block

Analog interface Rear, 11-pole plug-in screw terminals

Regulator type Primary switched-mode regulator with

BET technology

Operating modes Adjustable constant voltage / constant

current source with automatic sharp transition

Output isolation Floating output with “safe electrical

separation” from the mains input and computer interfaces Max. allowable potential, output–ground: 120 V, capacitance, output–ground (housing) 60 nF

Output operating range

without switch, without fuse

Analog Interface

Connection 11-pole plug-in screw terminal block Reference potential Output minus pole, floating TRG input

Connector pin assignments:

Pin Designation Function

1SIG1 OUT

2SIG2 OUT

3TRG IN –

4TRG IN +

5 +15 V

6AGND

– Analog, inverting voltage control input

set

+ Analog voltage control input

set

+ Analog current control input

set

10 U-MON Output voltage measuring output

11 I-MON Output current measuring output

Digital, programmable, open-collector outputs (max. 30 V / 20 mA)

Digital, programmable control input (low: < 1.0 V, high: 4 ... 26 V), potential-free

Auxiliary voltage, +15 V / max. 50 mA reference point, connected to -output

(0 ... –5 V correspond to 0 ... U

(0 ... +5 V correspond to 0 ... U

(0 ... +5 V correspond to 0 ... I

(0 ... 10 V correspond to 0 ... U

(0 ... 10 V correspond to 0 ... I

, Ri = 10 k)

nom

, Ri = 10 k)

nom

, Ri = 10 k)

nom

, Ri = 9.8 k)

nom

, Ri = 9.4 k)

nom

Addressable V.24 – RS 232C Interface

Input 9-pin subminiature socket connector Output 9-pin subminiature plug connector Operating mode half-duplex, asynchronous, XON / XOFF Transmission speed adjustable from 50 to 19,200 bits per second Device address selectable from 0 to 30 or UNL (unlist) Max. Setting Rate approx. 15 settings per second Max. Sampling Rateapprox. 7 measurements per second

IEC 625 – IEEE 488 Interface (optional)

Connection 24-pin socket connector

per IEC 625.1, IEEE488.1

Interface SH1 SOURCE HANDSHAKE functions handshake source function

AH1 ACCEPTOR HANDSHAKE

handshake sink function

T6 TALKER

talker function with serial polling and automatic unlisting, no secondary address and no

Short-term range: If lengthy operation in the short-term

range occurs, overtemperature protection may be triggered resulting in output shutdown (see also short-term power in chapter 1.5.3).

talk-only operation

L4 LISTENER

listener function with automatic unlisting, no secondary address and no listen-only operation

SR1 SERVICE REQUEST

service request function

RL1 REMOTE / LOCAL

remote to local switching function with disabling

DC1 DEVICE CLEAR

reset function including selected device clear

PP1 PARALLEL POLL

parallel polling function with remote configuring

DT1 DEVICE TRIGGER

trigger function C0 No controller function E1/2 Open collector driver

Codes / formats Per IEEE 488.2 Device address Selectable from 0 to 30 or UNL (unlist)

Figure 1.5 Dimensional Drawing (benchtop device)

Max. setting rate Approx. 40 settings per second Max. sampling rate Approx. 15 measurements per second

8 GMC-I Messtechnik GmbH

Electrical Safety

Safety class I Overvoltage

category II for mains input

I for output and interfaces Fouling factor 2 Earth leakage

current 2.5 mA, typ.

IEC 61010-1:1990 + A1:1992 / DIN EN 61010-1: 1993 / VDE 0411-1:1994

DIN VDE 0160:1988 + A1:1989 class W1

EN 60950:1992 / VDE 0805:1990

Protection IP 20 for housing per

IEC 529:1989,

EN 60529:1991,

VDE 0470-1:1992 Electrical isolation Test voltage Mains/output–PE 1.35 kV~ Mains–output 2.7 kV~ (type test: 3.7 kV ~)

Electromagnetic Compatibility (EMC)

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

emission EN 55022:1998 class A Interference

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

EN 61000-4-3:1996 + A1:1998,

feature B EN 61000-4-4:1995, feature B EN 61000-4-5:1995, feature B EN 61000-4-6:1996, feature B EN 61000-4-11:1994, feature B

Ambient Conditions

IEC 68-2-6 (’90) Vibration resistance

10 ... 55 Hz, 0.3 mm, 1 octave / min., 3 x 30 min.

IEC 68-2-27 (’89) Impact resistance

(15 g, 11 ms, semi-sinusoidal, 3 x 6 shocks)

Temperature Operation: 0 to 50° C, range current derating at > 40° C

(see also chapter 1.5.3)

Storage: -25 to +75° C

Relative humidity Operation:



75%, no condensation allowed

Cooling With integrated fan

Inlet vent: side panel Outlet vent: rear panel

1.5.2 Mechanical Data

Type Benchtop device, suitable for rack

Dimensions See also dimensional drawing in

(W x H x D) Benchtop device:

Weight Approx. 2.8 kg

mounting

Figure 1.5

221.5 x 102 x 397.5 mm For 19" rack: ½19" x 2 standard height units x 400 mm

IEEE 488 interface (optional): approx. 0.1 kg

GMC-I Messtechnik GmbH 9

1.5.3 Electrical Data

Electrical Data for 120 W Models

 Unless otherwise specified, all entries are maximum values and apply within an operating

temperature range of 0 to 50C, within the nominal power range and the nominal line voltage range of 230 V

 Percentages make reference to the respective setting value or measured value.

Description (abbreviated name) SSP 120-20 SSP 120-40 SSP 120-80

Typ e 32 N 20 RU 10 P 32 N 40 RU 6 P 32 N 80 RU 3 P

Nominal Output Data Voltage setting range 0 ... 20 V 0 ... 40 V 0 ... 80 V

Output Characteristics

Setting resolution [display (< 10.00 /  10.00), remote]

Overall setting accuracy at 23 ± 5° C including system deviation (load / mains)

Static system deviation with 100% load fluctuation

Static system deviation with 10% line voltage fluctuation

Residual ripple Ua > 5% U

Common mode noise (10 Hz ... 1 MHz) 0.5 mA

Settling time (voltage) with load step of 10 ... 90% I

Under and overshooting with load step of 50 A / ms (Typical values) I = 80% 400 mV 400 mV 800 mV

Response time (voltage) with setpoint jump from 0  100% with setpoint jump from 100%  0

Response time (current) with setpoint jump from 0  100% with setpoint jump from 100%  0

Measured Value Displays (4-place)

Measuring resolution [display (< 10.00 /  10.00), query]

Measuring accuracy at 23 ± 5° C for values > 0.1% of the nominal value

Protective Functions

Output overvoltage protection, trigger value Setting Range

Reverse polarity protection load capacity Continuous 10 A 6 A 3 A

Reverse voltage withstand capacity Continuous 40 V 80 V 100 V

General

Power supply

Power consumption At nominal load

Efficiency At nominal load > 70% > 80% > 80%

Switching frequency Typical 200 kHz 200 kHz 200 kHz

Article Number K320A K321A K322A

Specified values are increased by a factor of approximately 1.2 within the functional range for line voltage, namely -10% to -15%.

nom

10% after a warm-up period of 30 minutes.

Short-term power where t < 90 s / Tu  25° C max. 200 W max. 240 W max. 240 W

1) 1

nom

Current setting range 0 ... 10 A 0 ... 6 A 0 ... 3 A

Continuous power at Tu 40° C

max. 120 W max. 120 W max. 120 W

Current derating where Tu > 40° C -0.25 A / K -0.15 A / K -0.07 A / K

Voltage Current

Voltage (10 Hz ... 10 MHz)

Current (10 Hz ... 1 MHz)

To le ra n ce

(Typical values) I = 80%

To le ra n ce No-load / nominal load No-load / nominal load

To le ra n ce

short-circuit / nominal load short-circuit / nominal load

Voltage Current

Power

Voltage Current

Power

Setting resolution

Setting accuracy

Line voltage 230 V~ +10 / 15%

In standby mode

With maximum short-term power

5 mV / 10 mV, 5 mV

2.5 mA

0.15% +30 mV

0.4% +35 mA

15 mV 20 mA

5 mV 8 mA

10 mV

eff

25 mA

eff

40 mV

200 s

40 mV 1 ms / 1 ms 1 ms / 1 ms

100 mA < 5 ms / < 5 ms < 5 ms / < 5 ms

2 mV / 10 mV, 2 mV

1 mA, 1 mA

0.1 W, 0.1 W

0.15% + 30 mV

0.4% + 25 mA

0.55% + 0.5 W

0 ... 25 V

0.1 V

2% + 0.2 V

47 ... 63 Hz

280 VA, 180 W

45 VA, 15 W

450 VA

10 mV

2 mA

0.15% +40 mV

0.5% +20 mA

10 mV 10 mA

5 mV 5 mA

10 mV

eff

20 mA

eff

0.5 mA

eff

80 mV

200 s

80 mV 1 ms / 1 ms 1 ms / 1 ms

60 mA

< 5 ms / < 5 ms < 5 ms / < 5 ms

10 mV, 4 mV

0.6 mA, 1 mA

0.1 W, 0.1 W

0.15% + 40 mV

0.5% + 15 mA

0.65% + 0.6 W

0 ... 50 V

0.2 V

2% + 0.4 V

230 V~ +10 / 15%

47 ... 63 Hz

280 VA, 170 W

45 VA, 15 W

500 VA

20 mV

1 mA

0.15% +80 mV

0.5% +10 mA

10 mV 10 mA

5 mV 5 mA

10 mV

eff

10 mA

eff

0.5 mA

eff

160 mV

200 s

160 mV 4 ms / 4 ms 4 ms / 4 ms

30 mA < 10 ms / < 10 ms < 10 ms / < 10 ms

10 mV, 8 mV

0.5 mA, 1 mA

0.1 W, 0.1 W

0.15% + 80 mV

0.5% + 10 mA

0.65% + 0.8 W

0 ... 100 V

0.4 V

2% + 0.8 V

230 V~ +10 / 15%

47 ... 63 Hz

280 VA, 170 W

45 VA, 15 W

500 VA

10 GMC-I Messtechnik GmbH

Electrical Data for 240 and 320 W Models

 Unless otherwise specified, all entries are maximum values and apply within an operating

temperature range of 0 to 50C, within the nominal power range and the nominal line voltage range of 230 V

10 % after a warm-up period of 30 minutes.

 Percentages make reference to the respective setting value or measured value.

SSP 240-20 SSP 240-40 SSP 240-80 SSP 320-32

32 N 20 RU 20 P 32 N 40 RU 12 P 32 N 80 RU 6 P 32 N 32 RU 18 P

0 ... 20 V 0 ... 40 V 0 ... 80 V 0 ... 32 V

0 ... 20 A 0 ... 12 A 0 ... 6 A 0 ... 18A

max. 240 W max. 240 W max. 240 W max. 320 W

max. 320 W max. 360 W max. 360 W max. 430 W

-0.5 A / K -0.3 A / K -0.15 A / K -0.5 A / K

5 mV / 10 mV, 5 mV

5 mA / 10 mA, 5 mA

0.15% +40 mV

0.5% +70 mA

25 mV 30 mA

5 mV 8 mA

15 mV

eff

50 mA

eff

0.5 mA

eff

40 mV

600 s

10 mV

3.33 mA / 10 mA, 3.33 mA

0.15% +45 mV

0.5% +45 mA

18 mV 30 mA

5 mV 8 mA

15 mV

eff

25 mA

eff

0.5 mA

eff

80 mV

300 s

20 mV

2 mA

0.15% + 80 mV

0.5% +25 mA

18 mV 15 mA

5 mV 5 mA

15 mV

eff

20 mA

eff

0.5 mA

eff

160 mV

200 s

50 mA

450 mV 450 mV 800 mV 450 mV

40 mV 1 ms / 1 ms 1 ms / 1 ms

200 mA < 5 ms / < 5 ms < 5 ms / < 5 ms

2 mV / 10 mV, 2 mV 2 mA, 10 mA, 2 mA

0.15% +40 mV

0.5% +70 mA

0.65% +1.4 W

80 mV 1 ms / 1 ms 1 ms / 1 ms

120 mA < 5 ms / < 5 ms < 5 ms / < 5 ms

10 mV, 4 mV

2 mA / 10 mA, 1.2 mA

0.15% +40 mV

0.5% +25 mA

0.65% +1 W

160 mV 4 ms / 4 ms 4 ms / 4 ms

60 mA < 10 ms / < 10 ms < 10 ms / < 10 ms

10 mV, 8 mV

0.6 mA, 1 mA

0.15% + 80 mV

0.5% +15 mA

0.65% +1.2 W

10 mV

5 mA / 10 mA, 5 mA

0.15% +50 mV

0.5% +70 mA

30 mV 40 mA

10 mV 20 mA

30 mV

eff

(Ua > 10%U

eff

0.5 mA

eff

64 mV

500 s

64 mV 1 ms / 1 ms 1 ms / 1 ms

180 mA < 5 ms / < 5 ms < 5 ms / < 5 ms

10 mV, 4 mV

2 mA, 10 mA, 2 mA

0.1 W, 0.1 W

0.15% +40 mV

0.5% +70 mA

0.65% +1.4 W

nom

)

0 ... 25 V

0.1 V

2% +0.2 V

0 ... 50 V

0.2 V

2% +0.4 V

0 ... 100 V

0.4 V

2% + 0.8 V

20 A 12 A 6 A 18 A

40 V 80 V 100 V 64 V

230 V~ +10 / 15%

47 ... 63 Hz

510 VA, 350 W

45 VA, 15 W

620 VA

230 V~ +10 / 15%

47 ... 63 Hz

500 VA, 340 W

45 VA, 15 W

690 VA

230 V~ +10 / 15%

47 ... 63 Hz

500 VA, 340 W

45 VA, 15 W

690 VA

> 68% > 70% > 70% > 69%

200 kHz 200 kHz 200 kHz 200 kHz

K330A K331A K332A K334A

Specified values are increased by a factor of approximately 1.2 within the functional range for line voltage, namely -10% to -15%.

0 ... 40 V

0.2 V

2% +0.4 V

230 V~ +10 / 15%

47 ... 63 Hz

650 VA, 460 W

50 VA, 15 W

770 VA

GMC-I Messtechnik GmbH 11

2 Initial Start-Up

Warning!

Attention!

ANALOG INTERFACE OUTPUT

OUTIN RS 232

230V 5

FUSE T4

➁

➂

➁

Interface Module

Ribbon Cable

➁

➀

➁

19“ Dummy Plate

19“ Abutment

➃

19'' Connector Plate

19'' Abutment

➃

2.1 Preparing for Operation

2.1.1 Installing the IEEE 488 Interface Module

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. One KONSTANTER and a cover plate, or two devices next to each other can be installed to the rack. The benchtop instrument can be quickly retrofitted for rack mounting.

The KONSTANTER must be disconnected from the mains before installing the interface module. Switch the KONSTANTER off, and then pull the mains plug from the outlet. Wait at least 5 minutes before opening the KONSTANTER, in order to assure that the capacitors have been discharged to a safe voltage level. Capacitors may otherwise be charged with life endangering voltage, and coming into contact with them may result in severe injury.

The interface module may be damaged by electrostatic

discharge. Observe guidelines for handling electrostatic sensitive devices. Do not touch electrical contacts or PCB

components.

➀ Disconnect the KONSTANTER from the mains, and pull the

mains plug from the outlet. Wait for at least 5 minutes in order to assure that the capacitors have been adequately discharged.

➁ Loosen the 4 screws in the housing cover and lift the cover

off.

➂ Unscrew the cover plate at the left-hand side of the rear

housing panel. Save the screws for use in the next step..

Retrofit for Rack Mounting a Single Device

Use the accessory adapter: 19'' adapter 1 x 32 N. This accessory components includes a 19'' abutment and a 19'' blanking plate.

➀ Loosen the 4 screws at the KONSTANTER front panel. ➁ Pull out the filler strips from the left and right sides.

Figure 2.1.2 aRack Installation of a Single KONSTANTER

➂ Replace the filler strips with the 19'' abutment on one side,

and with the 19'' blanking plate on the other side, and secure them with the four screws.

➃ Unscrew the feet from the bottom of the housing. Remove

the rubber inserts from the feet to this end. The screws are then exposed.

➄ Now install the KONSTANTER to the rack. Save all loose

parts for possible future use.

Figure 2.1.1 a Opening the KONSTANTER Housing

the rack. The guide rails, as well as the front panel mounting screws used to secure the KONSTANTER, are rack-specific and

The KONSTANTER must be attached to guide rails at one side of

➃ The interface module:

must be procured from your rack supplier. With the ribbon cable facing forward, push the interface module through the housing rear panel and into the device interior.

Securely screw the sheet metal cover on the interface module to the housing rear panel from the outside. Use the two screws referred to in step➂.

➄ Insert the plug connector from the interface module into the

connector strip on the primary printed circuit board. Do not twist the ribbon cable.

Retrofit for Rack Mounting Two KONSTANTERs

Use the accessory adapter: 19'' adapter 2 x 32 N.

This accessory component includes two 19'' abutments and one

19'' connector plate.

➀ Loosen the 8 screws at the KONSTANTER front panels. ➁ Pull out the filler strips from the left and right sides of each

device.

Figure 2.1.2 b Rack Installation for Two KONSTANTERs

➂ Replace the filler strips with the 19'' abutments at the far left

and far right, and with the 19'' connector plate in the middle, and secure them with the eight screws.

Figure 2.1.1 b Installing the Interface Module

➅ Return the housing cover and secure it with the four screws.

The KONSTANTER can now be connected as usual.

12 GMC-I Messtechnik GmbH

Screw both housings to the through-holes and threads in the plug protector at the rear.

➃ Unscrew the feet from the bottom of the housing. Remove

Attention!

Warning!

the rubber inserts from the feet to this end. The screws are then exposed.

➄ If you would like to electrically connect the two

KONSTANTERs, use the “mains jumper cable” and “RS 232 bus cable” accessories.

➅ Install the two devices to the rack. Save all loose parts for

possible future use.

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

2.1.3 Combining Benchtop Devices

Up to 3 benchtop KONSTANTERs can be stacked in combination (see also chapter 5 for electrical connection options via the analog interface).

➀ Unscrew the feet from the bottom of the housing. Remove

the rubber inserts from the feet to this end. The collar screws are then exposed. Four oblong slots now become visible at the bottom of the housing.

➁ Turn the 4 collar screws from the feet into the 4 threaded

holes on the top of the other device housing. Save the 4 retaining washers and feet for possible future use.

➂ Set the KONSTANTER without feet onto the top of the other

KONSTANTER. The screws from the bottom KONSTANTER must protrude through the oblong slots in the base of the other KONSTANTER. Carefully push the top KONSTANTER back until the screws snap into place.

➃ Screw the two KONSTANTERs together via the through-

holes and threads in the plug protector at the back. The top KONSTANTER is thus secured against shifting.

➄ If you would like to electrically connect the two

KONSTANTERs, use the “mains jumper cable” and “RS 232 bus cable” accessories.

2.1.4 Connection to the Mains

Observe WARNING I!

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

The KONSTANTER requires 230 V ~ supply power. Connect the mains inlet plug at the rear panel to a mains outlet with earthing contact using the included power cable. Rated power consumption is specified on the serial plate at the bottom of the KONSTANTER.

A mains outlet is included above the mains inlet plug for looping mains power through to an additional KONSTANTER.

This mains outlet can neither be switched on and off, nor is it protected with a fuse.

If mains power is looped through, make sure that overall current consumption does not exceed 10 A at the incoming supply lines! Suitable “mains jumper cables” are available as accessories (see order information on last page).

2.1.5 Connecting Power Consumers

The output leads are connected either at the front panel with 4 mm safety plugs to the “” and “” safety jacks, or at the rear panel to the “” and “” outputs at the 6-pole screw terminal. If loads are connected to both the front and the rear panel (not allowed in the event of parallel connection due to danger of overload!), constant voltage regulation applies to the terminals at the rear panel. There are two terminals each for “” and “” for load connection at the rear panel.

In the case of load current of greater than 10 A, these terminals must be parallel connected due to the specified contact rating. 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.

The yellow-green safety jack at the front panel is connected to PE, and can be used to connect ground cables or cable shield, or can be used as an earth connection point for one of the output poles.

2.1.6 Connection to Computer Interfaces

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

Comments

 The KONSTANTER 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 KONSTANTERs should be switched off while establishing the bus connection.

 Both interfaces are equipped with a common ground (GND),

and are electrically isolated from the output in accordance with specified electrical safety regulations.

 Interface configuration is described in chapter 4.7.4.

RS 232C Interface

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. A suitable cable with a length of approximately 2 meters is available as an accessory for connecting the KONSTANTER and the controller. Cables with other lengths are commercially available. Appropriate adapters are available as well, in the event that your controller is equipped with a 25-pin plug connector. If you would like to fabricate the connector cable yourself, you’ll need a 3-conductor shielded cable in order to establish connection as shown in Figure 2.1.6 a.

GMC-I Messtechnik GmbH 13

Figure 2.1.6 a Pin Assignments for 9-Pin Plug and

TxD_IN 2

RxD_IN

GND_IN

2 RxD

3 TxD

5 GND

SSP

9-pin Plug9-pin Socket Connector

RxD_OUT 2

TxD_OUT

GND_OUT

2 TxD_IN

3 RxD_IN

5 GND_IN

9-pin Plug 9-pin Socket Connector

SSP

OUT

RS 232

PC/Controller

SSP

RS 232

COM1/COM2

IN OUT

Accessory: RS 232 Bus Cable, 0.4 meters

Accessory: RS 232 Bus Cable, 2 meters (for example)

Socket Connectors

The serial interface furnished with this KONSTANTER series is addressable. Up to 30 KONSTANTERs can be addressed via this interface.

Data Queries

If a device (slave) is requested to return data to the controller, it

may not be addressed in the interim. In other words, the controller

must wait until all requested data have been fully received. No

data may be transmitted to any other devices during this period of

time.

In the case of multiple device serial operation, good timing must be

assured. Data collision is thus avoided, which may result in

interruption of data transfer and deletion of output buffer

contents.

If the slave does not respond within a specified period of time

(TIMEOUT), the controller can try to synchronize the device with a

universal command, or execute a reset and request the required

data once again.

IEEE 488 Interface

 Up to 15 IEC bus controlled devices (including the controller)

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’ll need a suitable adapter cable.

In order to assure reliable data transfer, the cable length between any two devices should not exceed 2 meters, and overall length should not exceed 15 meters.

Double shielded connector cable is recommended if the KONSTANTERs are operated in proximity to strong sources of interference or their power cables.

2.2 Switching the Instrument On

After the described preparations have been completed, the

device can be switched on.

 Press the mains switch [1] at the front panel until it snaps into

place in order to turn the device on.

Power-Up Test

The microprocessor included in the device then starts a power-up

Figure 2.1.6 b Interconnection via the Serial Interface

If RS 232 communication is to be expanded to several KONSTANTERs, additional arrangements must be made regarding data protocols.

Addressing

A separate address is assigned to each interconnected KONSTANTER. If the KONSTANTER receives its own address, it is switched to the “addressed” status after which it accepts all subsequent commands and data, until it is unlisted upon receipt of a different device address. In compliance with IEEE 488, an address range of 0 to 31 is used, although address 31 is reserved as a general unlist command (UNL). The serial interface’s device address is thus identical to the address of the optional IEEE 488 interface (if included).

Universal Commands

In addition to the command

Addr xxDevice address, other general commands can be used which are accepted without previous addressing.

*TRG Trigger command, synchronization

DCL Device clear

IFC Interface clear Explanations of these commands and their syntax are included in

chapter 6.

14 GMC-I Messtechnik GmbH

test. The following operations are performed during the test routine (duration approximately 8 seconds):

– Reset all functional units (except battery-backed setup

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

The “LOCKED/SEQ” LED [12] 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 optional “IEEE 488 computer interface”, the selected IEC bus device address then appears briefly at the display (e.g. “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).

If this status is not achieved despite 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.

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 25 V (for 20 V models)

50 V (for 40 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 69):

– Default settings or – Last used device settings or – Last used device settings with 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 one 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-back configuration memory, are retained.

Caution!

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

GMC-I Messtechnik GmbH 15

3 Controls, Display Elements and Terminals

12356 89 12

171615141311 1074 18

Note: Numbers in brackets make reference to the figures included below.

[1] Mains Switch <POWER>

For turning the KONSTANTER on and off After switching the KONSTANTER on, a self-test is performed with a duration of approximately 8 seconds. After successful completion of the self-test, the KONSTANTER briefly displays its interface address and the version number of the installed firmware, one after the other. The POWER-ON function then configures the device with predetermined settings and the device is ready for use.

When the KONSTANTER 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 setup memory, are retained.

[2] Output On-Off Key <OUTPUT>

The power output can be activated and deactivated by pressing the <OUTPUT> key. The red LED above the <OUTPUT> key is illuminated as long as the output is active. No significant output voltage overshooting occurs when the output is activated and deactivated.

Activation sequence:

If the power output is activated, current and voltage are initially set to “0” for transition from the “highly resistive” state. Setpoints do not become active until after this transition has been completed.

Deactivation sequence:

Current is set to 0 A and voltage to 0 V for approximately 350 ms. A sink is thus activated which discharges the output capacitors to the greatest possible extent. The sink is then deactivated and the output becomes highly resistive. However, the output terminals are not electrically isolated.

[3] Control Mode, Protective Function and Status Displays

No LEDs light up: Output has not been activated

LEDs lights up:

Indicates the output’s operating status (control mode) if it has been activated:

Green CV LED Constant voltage regulation (Uout = Uset)

Green CC LED Constant current regulation (Iout = Iset)

Blinking LED:

Indicates the reason for automatic deactivation of the output

Green CV LED OVP (overvoltage protection)

Overvoltage protection has been triggered,

because output voltage has exceeded the selected trigger value OVP / OVSET.

Possible causes:

☞ Voltage setpoint USET has been set too high manually,

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)

☞ Unipolar power recovery from the connected consumer

(e.g. DC motor)

16 GMC-I Messtechnik GmbH

☞ 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).

☞ Parallel connected voltage sources

Green CC LED OCP (overcurrent protection)

Overcurrent protection is active. If the OCP ON function has been activated, the output was operated for a duration of t > DELAY in the current limiting mode (current regulation). The output has been deactivated.

Possible causes:

☞ Current setpoint ISET has been set too low manually, memory

recall, programming error or Iset control signal to the analog interface

☞ Current transients caused by switching inductive

consumers (DELAY time may be set too low)

Yellow Pmax LED OTP (overtemperature protection)

Electronic power limiting has been

(overload! Pout > Pnom).

Possible causes:

triggered

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

obstructed.

☞ Excessive ambient temperature

The KONSTANTER 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.

☞ The fan has failed.

☞ A device error or defect has occurred.

After the cause of triggering has been eliminated, the output can be reactivated.

[4] Output

Selected constant voltage or constant current is available from the safety jacks at the front panel.

 blue Negative output pole  red Positive output pole

yellow-green Earth connection point for the output or

shield terminal if shielded output leads are used. The ground terminal is connected to the housing and the earthing contact at the mains connection.

The power consumer can also be connected to the OUTPUT interface [22] at the rear panel.

[5] Left-Hand Display with [7]

[6] Display Parameter Indicators (LEDs)

As a default setting, the measured output voltage value Uout appears in volts at the left-hand display. The display can be switched to the momentary measured voltage value Uset by slightly turning the voltage adjusting knob [5], or by pressing the <ENTER> key. The LEDs allocated to the display indicate which value is being displayed (green LED = measured value, yellow LED = setting value).

 Uout / V (gr) = Measured output voltage value in V  Uset / V (ye) = Output voltage setpoint in V (blinking

indicates that the displayed value has not yet been set)

If no adjustment is made for a period of 10 seconds during the display of a setting value, the display returns to Uout automatically. Additional KONSTANTER functions can be selected with the <SELECT>, <FUNCTION>, <RCL> and <SAVE> keys. The function code or the parameter name appears at the left-hand display in this case.

[7] Rotary Knob for Voltage Adjustment <Uset>

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, whose setting resolution (step size per pulse) can be set to either coarse, medium or fine with the <SELECT> function. 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 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 the measured voltage value Uout. The display can be immediately switched to the Uout value by pressing the <CE/LOCAL> key.

☞ Detailed explanations are included in chapter 4.6.

[8] Right-Hand Display with [10]

[9] Display Parameter Indicators (LEDs)

As a default setting, the measured output current value Iout appears in amperes at the right-hand display. The display can be switched to the momentary current setpoint Iset by slightly turning the current adjusting knob [8], or by pressing the <ENTER> key twice. The LEDs allocated to the display indicate which values are being displayed (green LED = measured value, yellow LED = setting value).

 Iout/A (gr) = Measured current value in A  Iset / A (ye) = Current setpoint in A (blinking indicates that

the displayed value has not yet been set)

If no adjustment is made for a period of 10 seconds during the display of a setting value, the display returns to Iout automatically.

GMC-I Messtechnik GmbH 17

Additional KONSTANTER functions can be selected with the

Attention!

<SELECT>, <FUNCTION>, <RCL> and <SAVE> keys. The respective measured value or setting parameter appears at the right-hand display in this case.

[10] Rotary Knob for Adjusting Current <Iset/A>

The same applies to this rotary knob, with reference to output current, as is also the case with the voltage adjusting knob [5].

[11] Parameter Adjusting Keys  and 

The <> (increment) and <> (decrement) keys are used to select or adjust all KONSTANTER functions and their parameters.

☞ Detailed explanations are included in chapters 4.6, 4.7

and 4.14.

[12] Interface Displays: REMOTE, ADDR, SRQ, LOCKED

The respectively illuminated LED indicates the current operating state of the computer interface:

REMOTE on: The KONSTANTER is being remote

controlled, front panel controls are disabled.

ADDR/DATA on: The KONSTANTER has been addressed

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

SRQ/STS on: The KONSTANTER is transmitting a service

request.

LOCKED/SEQ on: Indicates that manual controls are disabled:

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

blinking: Sequence mode display in

disabled and enabled state:

– Slow blinking: sequence in hold status – Fast blinking: sequence in run status

Sequence mode display

LLO is displayed when any key or rotary knob is activated (

and disabling:

ocal lockout).

[13] Function Selection Key <SELECT>

 Selection of displayable measured values  Resolution of display values and setting values

☞ Detailed explanations are included in chapters 4.6, 4.7

and 4.8.

[14] Recall Key <RCL>

Recall of stored KONSTANTER settings, value pairs (Uset and Iset) and any associated dwell time setting for possible readjustment.

☞ Detailed explanations are included in chapter 4.10.

[15] <ENTER> Key

The <ENTER> key is used for several functions:

 Execute selected functions  Acknowledge selected text parameters  Go to the next lowest function menu level  Switch the display from Uout / Iout to Uset / Iset with active

cursor

Setpoint changes are acknowledged with the <ENTER> key

in this mode.

 Move cursor back and forth between Uset and Iset in the

Uset / Iset display

 Activate the recalled memory location

☞ Detailed explanations are included in chapters 4.6, 4.7

and 4.12.

[16] <CE/LOCAL> Key

This key has several functions:

 Abort an operation  Switching from remote to local control  Disable front panel controls  In combination with special functions

☞ Detailed explanations are included in chapter 4.13.

[17] Save Key <SAVE>

 Saves device settings, value pairs (Uset and Iset) and any

associated dwell time. In the manual mode, this key also fulfills the function of the STORE computer command.

 Disabling of front panel controls in order to prevent

inadvertent or unauthorized changes to settings is only possible in combination with the <CE/LOCAL> key.

☞ Detailed explanations are included in chapter 4.9.

[18] Function Selection Key <FUNCTION>

No special key is assigned to device functions which are normally seldom adjusted or used. These functions are controlled in a menu-driven fashion.

☞ A description of the menu and the procedure for setting all

functions and parameters is included in chapter 4.7.

[19] RS 232 Interface

☞ Detailed explanations regarding remote control of

KONSTANTER functions via the RS 232 serial interface are included in chapter 2.1.3.

☞ Interface-specific commands are included in chapter 6.4.

[20] IEEE 488 Bus Connection

Connection for remote control of KONSTANTER functions:

☞ Detailed explanations are included in chapter 2.1.1.

☞ Interface-specific commands are included in chapter 6.4.

The electrical contacts of all interfaces are connected to components which may be damaged by electrostatic discharge. Neutralize potential differences between yourself and the device by grasping the housing before touching these contacts!

18 GMC-I Messtechnik GmbH

[21] Analog Interface

Attention!

Warning!

GOSSEN METRAWATT

IEC 625/IEEE 488 INTERFACE F. SSP-KONSTANTER BEST.NR. K380A

SENSE

I-MON

U-MON

Iset

Uset

AGND

15V

TRG IN

SIG2 OUT

SIG1 OUT

ANALOG INTERFACE OUTPUT

OUT

RS 232

230V 50-60Hz

FUSE T4/250V

19 20

21 22

23 24 25

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

analog control voltages ranging from 0 to 5 V, or 5 to 0 V

☞ chapter 5.8 / chapter 5.4

 External measurement or recording of output voltage and

current based on monitor signals, 0 to 10 V

☞ chapter 5.4 / chapter 5.5

 Supply external controllers with +15 V auxiliary power  Linking of several devices for master-slave operation

☞ chapter 5.9 / chapter 5.10

 Varying the internal output resistance value

☞ chapter 5.8

 Control of a selected device function via the floating trigger

input

☞ chapter 5.7

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!

All of the control cables connected to the analog interface should be shielded. Ground the shield directly to the device using the shortest possible connection lead. One of the threaded holes for the plug protector at the rear panel can be used for this connection. Use a suitable screw and washer to secure the connection and assure good contact.

[22] OUTPUT Interface

The output interface offers two options:  Take constant voltage or constant current from the terminal

strip at the rear panel of the KONSTANTER.

 Connect sensing leads for compensation of voltage drops in

the output leads

☞ chapter 5.3

[23] Exhaust Vents

The exhaust vents are required for regulating the temperature inside the device. Warm air generated during operation of the device is discharged via these vents with the help of a temperature controlled fan.

The exhaust vents may not be closed or obstructed, because heat accumulation inside the device may result in malfunctioning, failure or damage to the KONSTANTER.

[24] Mains Input

Mains input with looped through mains outlet for inlet plug. The looped through mains outlets make it possible to directly connect up to three devices using two short power cables with inlet plugs. In this way, only one mains power cable is required to operate all three devices.

[25] Mains Fuse

Fusing for the 230 V mains power input

All devices: T 4.0 A / 250 V (6.3 x 32 mm)

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 absolutely prohibited (“repairing” fuses, short-circuiting fuse holders etc.).

GMC-I Messtechnik GmbH 19

4 Manual Operation and Device Functions

Uset / V

Uout

(1)

(2)

(3)

4.1 Menu Structure

After the power-up sequence has been completed, the device is switched to the basic operating mode 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 protection and overcurrent shutdown

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

• CAL (calibration menu) Balance the

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.

KONSTANTER

 Initializing the Procedure

☞ Slightly turn (1) the Uset knob [7].

! 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 [6] goes out and the yellow Uset/V LED

[6] lights up. Continuous illumination of the Uset/V LED indicates that values are activated immediately during adjustment.

 Selecting Resolution

! 3 step widths are possible: 0.01 V, 0.1 V or 1 V. ! The blinking decimal place [5] indicates which step width will

be used for setpoint adjustment.

☞ Repeatedly press the <SELECT> key [13] 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 [7]:

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).

4.2 Setting Output Voltage and Output Current

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

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

• Pre-selected settings Output voltage or current is preset with the scroll keys to the desired value. The selected value is activated at the output after acknowledging with the <ENTER> key.

4.2.1 Direct Selection (rotary knobs and scroll 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, current 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 above 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 state. Depending upon the selected output quantities and the load situation, either output voltage or output current is regulated. CV (constant voltage) indicates voltage regulation, and CC (constant current) indicates 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 corresponding setpoint by slightly turning one of the rotary knobs (Uset or Iset). This change is indicated by the respective LED above the display. The blinking decimal place indicates the resolution with which adjustment will take place. Resolution can be adjusted with the <SELECT> 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 scroll keys, in which case resolution can also be pre-selected.

Figure 4.2.1 a Continuous Adjustment of Uset

☞ Adjust (3) with the <> key or the <> key [11]

<> (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!

Uset – Output Voltage

• Adjustment with the Uset rotary knob [7] is not enabled until 0.4 seconds after the digital display [5] 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 value always appears at the display [5].

• If no adjustment is made for a period of 10 seconds, the display automatically returns to the measured voltage value Uout. The display can be immediately switched to the Uout value by pressing the <CE/LOCAL> key [16].

• 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 enabling.

20 GMC-I Messtechnik GmbH

Iset – Output Current

Iset / A

Iout

(1)

(2)

(3)

Uset / V

ENTERENTER

ENTER

Uout Iout

Select Uset

Uout Unchanged!

CE/LOCAL

Uout Iout

Iout Unchanged!

Activate

Select Iset

Uset

The procedure for selecting output current Iset is identical to the procedure for selecting output voltage Uset (4.1.2).

However, the following controls and displays must be substituted:

• Iset rotary knob (chapter 3 [10]

• Right-hand display (chapter 3 [8])

• Yellow Iset/A LED (chapter 3 [9])

• Setting resolution: 4 step widths are possible: 0.001 A / 0.01 A / 0.1 A / 1 A

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

! 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.

☞ 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.

4.2.2 Pre-selected Setting (ENTER, scroll keys)

Figure 4.2.2 a Adjusting Uset with a Specified Fixed Value

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 with 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 LEDs above 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 scroll keys (and only with the scroll 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.

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] starts blinking. ! A blinking Uset/V LED 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].

GMC-I Messtechnik GmbH 21

• 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!

4.3 Switching the Power Output On and Off

The <OUTPUT> key (chapter 3 [2]) functions independently of the current operating state of the KONSTANTER.

Details regarding control mode, protective function and status displays which provide information concerning the output’s operating mode are included in chapter 3 [3].

Closed Loop Control Mode

The power output can be activated or deactivated by pressing the <OUTPUT> key [2].

OUTPUT OFF OUTPUT ON

REMOTE status (remote control)

(chapter 3 [12], chapter 4.13)

The <OUTPUT> key [2] is disabled and has no function.

LOCAL LOCKED status (front panel controls disabled)

(chapter 3 [12], chapter 4.13)

The <OUTPUT> key [2] is disabled and has no function.

trG out (T_MODE OUT) and External Trigger Active

The output can be activated an 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 by the red LED above the <OUTPUT> key [2]:

LED on = output activated LED off = output deactivated

In the case of OUTPUT OFF, the control mode displays are also switched off

(chapter 3 [3]).

If the output has be deactivated as a result of overtemperature protection, the yellow “240 W” LED [3] in the control mode display blinks. The output cannot be activated until the KONSTANTER has returned to its normal operating temperature.

(chapter 3 [4/22]) is indicated

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:

• 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.

Functions Meaning Manual

Operation

OVP (OVSEt) Overvoltage

protection

OCP Overcurrent

Pon (POWER_ON)

SEq Sequence chapter 4.7.4 page 70 trG (T_MODE) page 28 page 74

4.4

Limiting the Allowable Working Range: Ulim, Ilim

Allowable setting limits for voltage and current can be restricted 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 scroll keys. New settings become immediately active.

Attention!

These settings represent so-called soft limits. This means that values can be selected both manually and via the computer interface which lie within these limit values, 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.

protection

page 25 page 69

page 26 page 68

page 26 page 69

Remote Operation

Settings

See description on page 25.

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

Functions

• Protection for the connected power consumer

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

• Triggering of overvoltage protection causes immediate (< 200 s) deactivation of the output (OUTPUT OFF). The HF power transmitter is disabled, and the electronic sink for discharging the output capacitors for 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 CV LED blinks as soon as overvoltage protection OVP is triggered (see also chapter 3 [3]), and the red OUTPUT LED goes out.

• As soon as the shutdown condition no longer exists, the power output can be reactivated by pressing the <OUTPUT> key, by transmitting a trigger signal to the analog interface or by means of computer control (“OUTPUT ON” lights up).

Settings

See description on page 25.

➅ red OUTPUT LED

Ulim – Setting the Upper Voltage Limit Value

Functions

• 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

See description on page 25.

Ilim – Setting the Upper Current Limit Value

Functions

• 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.

OCP – Overcurrent Protection

Functions

• Protects the power consumer from continuous overcurrent.

• Deactivates the power output when load current Iset has been reached, and the output is switched to the current regulating mode.

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

! 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

! In order to maintain short response times when

programming voltage increases

•The CC LED blinks as soon as overvoltage protection OCP is triggered (see also chapter 3 [3]), and the red OUTPUT LED goes out.

• The power output can be reactivated at any time by pressing the <OUTPUT> key, by transmitting a trigger signal to the analog interface or by means of computer control (OUTPUT ON OUTPUT LED lights up).

➅ red

Settings

See description on page 26.

22 GMC-I Messtechnik GmbH

dLY – Output Off Delay for OCP

Functions

• Delay time prior to deactivation of the power output after current regulation has been triggered (Iout = Iset)

• Only enabled with activated OCP function (OCP ON)

• If output current Iout drops below Iset before DELAY time elapses, the shutdown sequence is aborted.

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

• The default setting after RESET (*RST) is 00.00.

Settings

See description on page 26.

4.7 Operating Menu via the FUNCTION Key

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

Function group Function Parameter (numeric / text)

■ Setup

SEt Ulim NP: xx.xx

Ilim NP: xx.xx OVP NP: xxx.x OCP TP: oFF / on dLY NP: xx.xx Pon TP: rSt / SbY / rcL



rnd TP: 0 / -1 / -2

TP: oFF / on / rSt

4.6 Display of Momentary Output Values Uout, Iout

and Pout

Uout – Momentary Measured Voltage Value

• Appears at the left-hand display [5].

•The green Uout/V LED [6] lights up and indicates display of the momentary measured voltage value.

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

• The momentary measured voltage value is displayed immediately if the user exits the device functions setting mode by pressing the <CE/LOCAL> key [16].

Iout – Momentary Measured Current Value

• Appears at the right-hand display [8].

• The green Iout/A LED [9] lights up and indicates display of the 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 <CE/LOCAL> key [16]

Pout – Display Momentary Output Power

Calculated internally based upon momentary measured values Uout and Iout.

Settings

See description in chapter 4.8.1.

UI_ – Display Measured Values in

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

See description in chapter 4.8.1.

U/I Min-Max Memory

■ Analog Interface

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



SiG1 TP: oFF / on / out / Mode / SEq /

SSEt / U-Lo / U-Hi / I-Lo / I-Hi

SiG2 TP: oFF / on / out / Mode / SEq /

SSEt / U-Lo / U-Hi / I-Lo / I-Hi

■ Sequence Function

SEq* tSEt NP: xx.xx

SSEt NP: oFF / on 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.

■ 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

■ Adjustment (calibration, chapter 7)

CAL dAtE TP: mm.yylast/new adjustment date

CAL TP: Strt MEAS UoFF UoFF NP: x.xxxentry of ext. measured value U MEAS UFS UFS NP: xx.xxentry of ext. measured value U MEAS IoFF IoFF NP: x.xxxentry of ext. measured value I MEAS IFS IFS NP: xx.xxentry of ext. measured value I CAL End

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 <SELECT> key.

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

• Displayed value = selected value.

TP: Text Parameters

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

• Acknowledge the selected value by pressing the <ENTER> key.

GMC-I Messtechnik GmbH 23

Settings

FUNCTION

ENTER

FUNCTION

Jump to last edited function group

Jump to last edited function

e.g.

CE/LOCAL

FUNCTION

☞

Press the <FUNCTION> key [14] 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 upon 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 groups menu by pressing the <CE/LOCAL> key.

• 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 a Accessing the Functions Submenu

☞ If the function groups menu is currently open, you can

access the following function groups:

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 should make it easy to configure device functions and parameters without leafing back and forth through the instructions.

☞ 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).

24 GMC-I Messtechnik GmbH

4.7.1 SET – “Setup” Function Group

FUNCTION

FUNCTION Press on ce

ENTER

Press repeatedly if necessary

Jump to last edited setup function

Cursor position

SELECT

Resolution of

numeric parameter

Select a value for the upper voltage limit (numeric parameter)

CE/LOCAL

Uout

Iout

Ulim – Upper Voltage Setting Limit

Functions

See functions description on page 22.

Settings

The procedure is described in principle in chapter 4.7.

The Ulim display appears in the window for the setup function, along with a related numeric parameter [V].

Ilim – Upper Current Setting Limit

Functions

See functions description on page 22.

Settings

The procedure is described in principle in chapter 4.7.

! The Ilim display appears in

the window for the setup function, along with a related numeric parameter [A].

OVP – Overvoltage Protection Trigger Value

Functions

See functions description on page 22.

Settings

The procedure is described in principle in chapter 4.7.

! The OVP display appears in

the window for the setup function, along with a related numeric parameter [V].

☞ The OVP trigger value should be set at least 1 V higher than the

desired USET output voltage in order to prevent undesired triggering of the OVP function resulting from overshooting due to sudden output discharging (minimum values: chapter 1.5.3, “Electrical Data”)!

☞

The

OVP

trigger value makes reference to the prevailing voltage value

between the output terminals of the SSP. This voltage is increased

USET

by the

parameter during sensing mode operation (remote

sensing) by an amount equal to voltage drop at the output leads. For

OVP

and

USET

this reason, the above defined difference between must be correspondingly increased during sensing mode operation.

☞ The selected parameter becomes immediately active!

Note

• 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] / Cout [μF] ISET = selected current setpoint Cout = capacitance of the output capacitor Subsequent discharging time for the output capacitor

Figure 4.7.1 a Path to Ulim Settings

GMC-I Messtechnik GmbH 25

depends upon load, and corresponds to the specified values for response time at Unom 1 V included in chapter 1.5.3.

• Possible causes for triggering overvoltage protection are listed in chapter 3 [3], “Control Modes”.

OCP – Overcurrent Protection

Select the text parameter from an options loop

From the SEt function group

ENTER

CE/LOCAL FUNCTION

Select the text parameter from an options loop

From the SEt function group

ENTER

CE/LOCAL FUNCTION

Pon – Specifying a Power-On Status

Functions

See functions description on page 22.

Setting Parameter

☞

OFF: OCP function is 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.

☞ The selected text parameter does not become active until the

<ENTER> key is pressed!

Settings

The procedure is described in principle in chapter 4.7.

! The OCP display and a related

text parameter appear in the setup function window.

Functions

• Use automatic 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 panel controls are re-enabled after mains ON. From firmware version 4.003 onwards: Disabled panel controls remain blocked even after mains ON.

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

Disabled panel controls remain blocked even after mains ON.

Settings

The procedure is described in principle in chapter 4.7.

! The Pon display and a related text parameter appear in the

setup function window.

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 Ioad. 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.

dLY – Output Off Delay for OCP

Functions

See functions description on page 23.

Settings

The procedure is described in principle in chapter 4.7.

The

DELAY

the window for the setup function, along with a related numeric parameter [t].

display appears in

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 KONSTANTERs 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.

26 GMC-I Messtechnik GmbH

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

Select the text parameter from an options loop

From the SEt function group

ENTER

CE/LOCAL FUNCTION

Select the text parameter from an options loop

From the SEt function group

ENTER

CE/LOCAL FUNCTION

rnd – Rounding Off the Displayed Measured Value

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 UI

_ 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.

Setting Parameter

☞

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 the momentary measured value:

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

Functions

• Only effective for Uout and Iout measuring function

• Number of decimal places which appear at the display

• Stabilizes the display when fluctuation is expected at the last decimal place of the measured value

Setting Parameter

☞

0: no rounding

☞ -1: Rounded off one decimal place

☞ -2: Rounded off two decimal places

Settings

The procedure is described in principle in chapter 4.7.

! The rnd display and a related text

parameter appear in the setup function window.

Settings

The procedure is described in principle in chapter 4.7.

! The UI_ display and a related text

parameter appear in the setup function window.

☞ Default setting after RESET (*RST): OFF!

Figure 4.7.1 d Path to Selection of the Pon Text Parameter

Figure 4.7.1 e Path to Selection of the rnd Text Parameter

☞ Default setting after RESET (*RST): unchanged

GMC-I Messtechnik GmbH 27

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

The analog interface allows for remote control of the KONSTANTER. An isolated digital control input (TRG IN+ / TRG IN-) and digital signal outputs (SIG1 / SIG2) are available in addition to analog setting options.

Other devices can be controlled in this way (e.g. counters, alarms, SSP KONSTANTERs and many more). A master-slave system can be set up in combination with a second or several SSP KONSTANTERs (see also chapter 5).

Observe specified maximum current and voltage values for signal outputs.

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 _ LOW Ends sequence execution by jumping to

HIGH

The SEQUENCE function is started beginning with the start address,

the stop address.

SEQUENCE GO

☞ LLO: (LOCAL LOCKED) Operation via front panel controls is

disabled.

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 Parameter

☞

OFF: Trigger input function is deactivated, signals at the trigger input are ignored.

☞ OUT: Trigger input influences the OUTPUT: output on / off

TRIGGER Signal Influence on OUTPUT Status

LOW Status depends upon manual setting or

LOW _

HIGH OUTPUT in the OFF state,

HIGH

HIGH OUTPUT remains OFF or

_ LOW OUTPUT is activated,

programming command

OUTPUT is switched OFF

cannot be switched on – neither manually nor with a programming command

except in the event of OTP or OVP

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

(step-by-step sequence control)

TRIGGER Signal Influence on step-by-step control

Edge Low  High

Start trigger signal

TRIGGER Signal Influence on Front Panel Controls

LOW All front panel controls are functional.

HIGH All front panel controls are disabled,

except for the mains switch, no activation 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 _

TRIGGER Signal Influence on Min-Max Status

LOW The Min-Max function is active.

LOW _

HIGH The Min-Max function is inactive.

HIGH

HIGH The Min-Max function is deactivated.

Levels in the in Min-Max memories remain unchanged.

_ LOW Values in the Min-Max memories are

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

ON)

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

with the SAVE key.

Settings

☞

Procedure for configuring trG ➁ see also chapter 4.7

! The trG display and a related text

parameter appear in the AnIF function window.

☞ Default setting after RESET (*RST):

unchanged

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 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.

Figure 4.7.2 a Path to Selection of the trG Text Parameter

☞ SEQ: Controlling Execution of the SEQUENCE Function

28 GMC-I Messtechnik GmbH

+ 64 hidden pages

Gossen MetraWatt SSP 240 Series, SSP 120 Series, SSP 320 Series, SSP 240-20, SSP 120-80 Operating Instructions Manual

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

2.1.1 Installing the IEEE 488 Interface Module

2.1.2 Installation to 19'' Device Racks

2.1.3 Combining Benchtop Devices

2.1.4 Connection to the Mains

2.1.5 Connecting Power Consumers

2.1.6 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 and Output Current

4.2.1 Direct Selection (rotary knobs and scroll keys)

4.2.2 Pre-selected Setting (ENTER, scroll keys)

4.3 Switching the Power Output On and Off

Limiting the Allowable Working Range: Ulim, Ilim

4.5 Description of OVP and OCP Protection Functions

4.7 Operating Menu via the FUNCTION Key

4.7.1 SET – “Setup” Function Group

4.7.2 AnIF – “Analog Interface” Function Group