KEPCO BOP 1000W Operator's Manual

MODEL

OPERATOR’S MANUAL

ORDER NO. REV. NO.

KEPCO INC.

An ISO 9001 Company.

BOP 1000W

HIGH POWER BIPOLAR POWER SUPPLY

BOP 1000W

POWER SUPPLY

Declaration of Conformity

Application of Council directives:

73/23/EEC (LVD)
93/68/EEC (CE mark)

Standard to which Conformity is declared:

EN61010-1:1993 (Safety requirements for electrical equipment for measurement,

control and laboratory use)

Manufacturer's Name and Address:

KEPCO INC.
131-38 SANFORD AVENUE
FLUSHING, N.Y. 11355 USA

Conditions of Conformance

When this product is used in applications governed by the requirements of the EEC, the following restric­tions and conditions apply:

1. For European applications, requiring compliance to the Low Voltage Directive, 73/23/EEC, this power
supply is considered a component product, designed for "built in“ applications. Because it is incom­plete in construction, the end product enclosure must provide for compliance to any remaining electri­cal safety requirements and act as a fire enclosure. (EN61010-1 Cl. 6, Cl. 7, Cl.8, Cl. 9 and EN61010­1 annex F)

2. This power supply is designed for stationary installation, with mains power applied via a detachable
power supply cord or via direct wiring to the source power terminal block.

3. This power supply is considered a Class 1 (earthed) product, and as such depends upon proper con­nection to protective earth for safety from electric shock. (EN61010-1 Cl. 6.5.4)

4. This power supply is intended for use as part of equipment meant for test, measurement and labora­tory use, and is designed to operate from single phase, three wire power systems. This equipment
must be installed within a suitably wired equipment rack, utilizing a three wire (grounded) mains con­nection. See wiring section of this manual for complete electrical wiring instructions. (EN61010-1 Cl.

6.5.4 and Cl.6.10.1)

SAFETY INSTRUCTIONS

1. Installation, Operation and Service Precautions

This product is designed for use in accordance with EN 61010-1 and UL 3101 for Installation Category 2,
Pollution Degree 2. Hazardous voltages are present within this product during normal operation. The prod­uct should never be operated with the cover removed unless equivalent protection of the operator from
accidental contact with hazardous internal voltages is provided:

2. Grounding

This product is a Class 1 device which utilizes protective earthing to ensure operator safety.

There are no operator serviceable parts or adjustments within the product enclosure.
Refer all servicing to trained service technician.

Source power must be removed from the product prior to performing any servicing.

This product is factory-wired for the nominal a-c mains voltage indicated on the rat­ing nameplate located adjacent to the source power connection on the product's rear
panel. To reconfigure the product input for other nominal mains voltages as listed
herein, the product must be modified by a trained service technician.

!

!

!

OPERATOR

SAFETY INSTRUCTIONS

Read these safety instructions, as well as the applicable installation and operating instructions contained in
this manual before using the power supply.

Do not touch the output terminals. The output is dangerous. Electric shock can cause injury or death.

Do not remove the cover or disassemble the unit. There are no operator serviceable components or
adjustments inside the unit. High voltage components inside the unit can cause serious injury even with
input power disconnected.

Service must be referred to authorized personnel. Using the power supply in a manner not specified by
Kepco. Inc. may impair the protection provided by the power supply. Observe all safety precautions noted
throughout this manual. The following table lists symbols used on the power supply or in this manual where
applicable.

The liquid in the LCD is hazardous: do not lick or swallow. Wash skin and clothes immediately and thor-

WARNING

LIST OF

WARNINGS AND CAUTIONS

PAGE WARNING/CAUTION

3-19 WARNING: For inductive loads, and especially superconducting magnet type loads,

the inherent offset of the BOP in the OFF state may generate significant
current in the circuit. A properly rated switch in parallel with a resistor
must be connected between the power supply and the load. The switch
must be open and the BOP front panel LCD must read 0V, 0A before re­moving or installing connections between BOP and load.

3-19

WARNING: For both inductive loads and constant-current-type active electronic

loads when the BOP output is set to OFF, a path is provided for absorbing
either the energy accumulated in the reactance of the load during the ON
state, or energy delivered by an electronic load. This prevents damage to
the load and power supply as well as providing safety for the user. How­ever, In addition to the built-in safety features, constant-current-type ac­tive electronic loads must be adjusted to zero and the BOP front panel
LCD must read 0V, minimum current, before handling the power supply­to-load connections.

3-20

WARNING: Accessing the BOP after the output is disabled in BATTERY mode is haz-

ardous because (1) high current arcing is possible and (2) either the ex­ternal battery voltage, or the voltage (±Voltage Protection max) on the
BOP output terminals may be dangerous. Therefore, for battery and con­stant-voltage-type active electronic loads it is recommended that two
properly rated external switches be installed for safety: one in series with
the battery, and one across the BOP output. After the unit is set to OFF,
first open the switch is series with the battery, then close the switch

LIST OF

WARNINGS AND CAUTIONS

PAGE WARNING/CAUTION

2-3 CAUTION: When an external shut-down signal is sent to the unit, the shut-down con-

dition is latched and the red FAULT indicator on the front panel is ON. To
resume normal operation it is necessary to cycle power off, then on (pre­ferred) or briefly press the RESET key on the front panel.

2-6 CAUTION: it is recommended that source power of external equipment connected to

the Analog Port be applied through an isolating transformer To avoid
ground loops or possible damage to the BOP due to incorrect equipment
a-c wiring (e.g., defeating of ground connection).

2-8 CAUTION: The rack must provide support at the rear (within 6 inches of the rear pan-

el). Optional slides can also be used (see PAR. 2.4.2).

2-8 CAUTION: When working with active loads, the voltage or current of the active load

must not exceed the maximum voltage or current rating of the BOP. Oth­erwise the overvoltage or overcurrent protection will shut down the pow­er supply.

2-10 CAUTION: Never connect the load to the sense terminals. Monitoring instruments

(e.g., DVM, etc.) are the only external equipment that may be safely con­nected to the sense terminals.

2-10 CAUTION: Never connect the BOP OUTPUT terminal (or the load terminal tied to the

OUTPUT terminal) to earth-ground. Otherwise, if the controlling device is
grounded, the BOP can be damaged by the protection limit output current

LIST OF

WARNINGS AND CAUTIONS

PAGE WARNING/CAUTION

3-12 CAUTION: When the ADJUST control is rotated, the active parameter is immediately

effective if the output is enabled (on = STANDBY indicator not lit). The
voltage/current applied to the load changes as the ADJUST control is ro­tated.

3-18 CAUTION: When working with active loads, always adjust the BOP protection limits

to be above the maximum values of voltage or current expected from the
load. For example, when the BOP is operating in voltage mode sinking
energy from a constant current type load, set the current protection limits
of the BOP above the maximum current expected from the load.

3-25 CAUTION: Before Pressing

@ to enter the Saved Waveform Screen from the power-

up screen, perform the following steps to avoid unexpected voltages or
currents from previous settings being briefly applied to the load when the
waveform is first executed.

3-33 CAUTION: Pressing RESET will cause voltage transients to appear at the output

which may damage a connected load. Switch is recessed to prevent inad­vertent activation.

3-50 CAUTION: When the serial port has received an XOFF, the error message -400, QUE

error will be placed in the queue to indicate the loss of transmitted infor­mation due to a received XOFF character. When XON is received, the unit
will transmit all data in it's buffer followed by the exclamation character
(!). This (!) character is not part of any message from the BOP and indi-

TABLE OF CONTENTS

SECTION PAGE

SECTION 1 - INTRODUCTION

1.1 Scope of Manual ..................................................................................................................................... 1-1

1.2 General Description................................................................................................................................. 1-1

1.3 Specifications .......................................................................................................................................... 1-1

1.4 Local Control ........................................................................................................................................... 1-13

1.5 Remote Control ....................................................................................................................................... 1-13

1.6 Features .................................................................................................................................................. 1-13

1.6.1 Digital Calibration............................................................................................................................... 1-13

1.6.2 voltage/current Protection.................................................................................................................. 1-13

1.6.3 Waveforms......................................................................................................................................... 1-14

1.6.4 Saving and Recalling Settings ........................................................................................................... 1-14

1.6.5 External Reference (Analog Control)................................................................................................. 1-14

1.6.6 External Limits ................................................................................................................................... 1-14

1.6.7 User-defined Voltage/Current Maximum Values (Software Limits) ................................................... 1-14

1.6.8 Parallel and Series Configurations .................................................................................................... 1-14

1.6.9 Energy Recuperation ......................................................................................................................... 1-15

1.7 Equipment Supplied ................................................................................................................................ 1-15

1.8 Accessories ............................................................................................................................................. 1-15

1.9 Safety ...................................................................................................................................................... 1-15

SECTION 2 - INSTALLATION

2.1 Unpacking and Inspection ....................................................................................................................... 2-1

2.2 Terminations and Controls ...................................................................................................................... 2-1

2.3 Preliminary Operational Check................................................................................................................ 2-6

TABLE OF CONTENTS

SECTION PAGE

3.2.4 How to Access the menus ................................................................................................................ 3-6

3.2.4.1 Overall menu Structure ............................................................................................................... 3-6

3.2.4.2 How to Modify a Parameter......................................................................................................... 3-7

3.2.4.3 Password Setup. ......................................................................................................................... 3-7

3.2.4.4 How to Access a Password Protected Menu .............................................................................. 3-8

3.2.5 Operator Convenience Functions (Display Menu)............................................................................ 3-9

3.2.5.1 Adjusting LCD Brightness, contrast and Background ................................................................. 3-9

3.2.5.2 Displaying Programmed Settings in RemoTe Mode ................................................................... 3-10

3.2.5.3 Enabling/Disabling Audible Beeps .............................................................................................. 3-10

3.2.5.4 Displaying Meters or Graph (Time line) ...................................................................................... 3-11

3.3 Local Mode Operation ............................................................................................................................ 3-11

3.3.1 Setting Local Mode ........................................................................................................................... 3-11

3.3.1.1 Keypad Lockout .......................................................................................................................... 3-11

3.3.1.2 Local Password Protection at Power-up ..................................................................................... 3-11

3.3.2 Setting Voltage or Current Mode ...................................................................................................... 3-11

3.3.3 Programming Voltage or Current and Associated Protect Limits...................................................... 3-12

3.3.3.1 Selecting Bipolar/Independent Protection Limits......................................................................... 3-13

3.3.3.2 Understanding Voltage and Current Protect Limits ..................................................................... 3-15

3.3.3.3 Hidden Voltage and Current Protect Limits................................................................................. 3-15

3.3.4 Changing Maximum or Minimum Software-controlled Limits ............................................................ 3-16

3.3.4.1 Changing Maximum Accepted Voltage or Current (Main Channel Software Limits)................... 3-17

3.3.4.2 Changing Maximum/Minimum Protection Software-controlled Limits ......................................... 3-18

3.3.4.3 External Limits............................................................................................................................. 3-18

3.3.5 Enabling/Disabling DC Output Power ............................................................................................... 3-19

TABLE OF CONTENTS

SECTION PAGE

3.5 Digital Remote Mode Programming ........................................................................................................ 3-41

3.5.1 Operating Features Available only by Remote Commands............................................................... 3-41

3.5.1.1 Expanded Waveforms and Programs .......................................................................................... 3-41

3.5.2 Programming Techniques to Optimize performance ......................................................................... 3-41

3.5.2.1 Programming Voltage/Current Limit and Current/Voltage Limit................................................... 3-41

3.5.2.2 Making Sure the Previous Command is Complete ...................................................................... 3-42

3.5.3 Remote Mode Setup.......................................................................................................................... 3-43

3.5.3.1 GPIB Port Setup .......................................................................................................................... 3-44

3.5.3.1.1 Changing the GPIB Address ...................................................................................................3-44

3.5.3.1.2 Configure Device Clear (DCL) Control....................................................................................3-44

3.5.3.1.3 Determining Whether *RST Command sets the Output Off or On..........................................3-45

3.5.3.2 RS 232 Serial Port Setup............................................................................................................. 3-45

3.5.3.2.1 Select Baud Rate ....................................................................................................................3-45

3.5.3.2.2 Configure XON/XOFF Protocol...............................................................................................3-45

3.5.3.2.3 Configure Prompt Mode..........................................................................................................3-45

3.5.3.3 Establish communication language ............................................................................................. 3-46

3.5.3.4 BIT 4882 Compatibility................................................................................................................. 3-46

3.5.3.5 BIT 4886 Compatibility................................................................................................................. 3-46

3.5.4 IEEE 488 (GPIB) Bus Protocol .......................................................................................................... 3-46

3.5.5 BOP VISA Instrument driver.............................................................................................................. 3-48

3.5.6 RS232-C Operation ........................................................................................................................... 3-48

3.5.6.1 Serial INterface ............................................................................................................................ 3-48

3.5.6.2 RS 232 Implementation ............................................................................................................... 3-49

3.5.6.2.1 XON XOFF Method.................................................................................................................3-50

TABLE OF CONTENTS

SECTION PAGE

3.6.6 Program Message Syntax Summary ................................................................................................ 3-60

3.6.7 Status Reporting ............................................................................................................................... 3-60

3.6.7.1 Status Reporting Structure.......................................................................................................... 3-60

3.6.7.2 Operational Status Register........................................................................................................ 3-62

3.6.7.3 QUEStionable Status Register.................................................................................................... 3-62

3.6.8 SCPI Program Examples .................................................................................................................. 3-63

SECTION 4 - CALIBRATION

4.1 General ................................................................................................................................................... 4-1

4.2 Test Equipment Requirements ............................................................................................................... 4-3

4.3 Calibration using Remote SCPI commands via GPIB or RS 232 Interface ............................................ 4-4

4.3.1 Calibration Procedure using SCPI Commands................................................................................. 4-5

4.4 Calibration Using Front Panel Keypad in Local Mode ............................................................................ 4-10

4.4.1 Understanding the Calibration Process ............................................................................................ 4-10

4.4.2 Calibration Procedure using Local Mode .......................................................................................... 4-12

4.4.3 Calibration using VISA Driver Soft Panel.......................................................................................... 4-16

4.5 Calibration Storage ................................................................................................................................. 4-16

APPENDIX A - SCPI COMMON COMMAND/QUERY DEFINITIONS

A.2 *CLS — Clear Status Command ............................................................................................................ A-1

A.3 *ESE — Standard Event Status Enable Command................................................................................ A-1

A.4 *ESE? — Standard Event Status Enable Query..................................................................................... A-2

TABLE OF CONTENTS

SECTION PAGE

B.16 OUTPut:MODE? Query.......................................................................................................................... B-7

B.17 [SOUR

ce:]CURRent[:LEVel][:IMMediate][:AMPlitude] Command ...................................................... B-7

B.18 [SOURce:]CURRent[:LEVel][:IMMediate][:AMPlitude] Query ............................................................. B-7

B.19 [SOUR

ce:]CURRent[:LEVel]:LIMit[:BOTH] Command.......................................................................... B-7

B.20 [SOUR

ce:]CURRent[:LEVel]:LIMit[:BOTH]? Query .............................................................................. B-7

B.21 [SOURce:]CURRent[:LEVel]:LIMit:NEG Command.............................................................................. B-8

B.22 [SOUR

ce:]CURRent[:LEVel]:LIMit:NEG? Query................................................................................... B-8

B.23 [SOURce:]CURRent[:LEVel]:LIMit:POS Command .............................................................................. B-9

B.24 [SOUR

ce:]CURRent[:LEVel]:LIMit:POS? Query................................................................................... B-9

B.25 [SOURce:]CURRent:MODE Command................................................................................................. B-9

B.26 [SOURce:]CURRent:MODe? Query...................................................................................................... B-9

B.27 [SOUR

ce:]CURRent[:LEVel]:PROTect[:BOTH] Command................................................................... B-9

B.28 [SOURce:]CURRent[:LEVel]:PROTect[:BOTH] Query.......................................................................... B-10

B.29 [SOURce:]CURRent[:LEVel]:PROTect:MODE Command.................................................................... B-10

B.30 [SOUR

ce:]CURRent[:LEVel]:PROTect:MODE? Query......................................................................... B-10

B.31 [SOURce:]CURRent[:LEVel]:PROTect:NeGative Command............................................................... B-10

B.32 [SOUR

ce:]CURRent[:LEVel]:PROTect:NeGative? Query.................................................................... B-10

B.33 [SOUR

ce:]CURRent[:LEVel]:PROTect:POSitive Command ................................................................ B-10

B.34 [SOURce:]CURRent[:LEVel]:PROTect:POSitive? Query..................................................................... B-10

B.35 [SOUR

ce:]CURRent[:LEVel]:PROTect:LIMit[:BOTH] Command.......................................................... B-11

B.36 [SOUR

ce:]CURRent[:LEVel]:PROTect:LIMit[:BOTH]? Query............................................................... B-11

B.37 [SOURce:]CURRent[:LEVel]:PROTect:LIMit:NeGative Command...................................................... B-11

B.38 [SOUR

ce:]CURRent[:LEVel]:PROTect:LIMit:NeGative? Query........................................................... B-11

B.39 [SOUR

ce:]CURRent[:LEVel]:PROTect:LIMit:POSitive Command ....................................................... B-11

TABLE OF CONTENTS

SECTION PAGE

B.74 [SOURce:]LIST:TRIGger Command...................................................................................................... B-19

B.75 [SOUR

ce:]LIST:VOLTage Command .................................................................................................... B-19

B.76 [SOURce:]LIST:VOLTage? Query ......................................................................................................... B-19

B.77 [SOUR

ce:]LIST:VOLT:APPLy Command............................................................................................... B-22

B.78 [SOUR

ce:]LIST:VOLTage:APPLy:SWEep Command........................................................................... B-22

B.79 [SOURce:]LIST:VOLTage:APPLy:SWEep? Query ............................................................................... B-22

B.80 [SOUR

ce:]LIST:VOLTage:POINts? Query ............................................................................................ B-22

B.81 [SOURce:]LIST:WAIT:HIGH Command................................................................................................. B-22

B.82 [SOUR

ce:]LIST:WAIT:LEDGe Command .............................................................................................. B-23

B.83 [SOURce:]LIST:WAIT:LOW Command.................................................................................................. B-24

B.84 [SOURce:]VOLTage[:LEVel][:IMMediate][:AMPlitude] Command....................................................... B-24

B.85 [SOUR

ce:]VOLTage[:LEVel][:IMMediate][:AMPlitude]? Query............................................................ B-24

B.86 [SOURce:]VOLTage[:LEVel]:LIMit[:BOTH] Command .......................................................................... B-24

B.87 [SOURce:]VOLTage[:LEVel]:LIMit[:BOTH]? Query............................................................................... B-24

B.88 [SOUR

ce:]VOLTage[:LEVel]:LIMit:NEGative Command...................................................................... B-25

B.89 [SOURce:]VOLTage[:LEVel]:LIMit:NEGative? Query........................................................................... B-25

B.90 [SOUR

ce:]VOLTage[:LEVel]:LIMit:positive Command ......................................................................... B-25

B.91 [SOUR

ce:]VOLTage[:LEVel]:LIMit:positive? Query .............................................................................. B-25

B.92 [SOURce:]VOLTage:MODe Command.................................................................................................. B-25

B.93 [SOUR

ce:]VOLTage:MODE? Query...................................................................................................... B-26

B.94 [SOUR

ce:]VOLTage[:LEVel]:PROTect:BOTH Command ..................................................................... B-26

B.95 [SOURce:]VOLTage[:LEVel]:PROTect[:BOTH]? Query ........................................................................ B-26

B.96 [SOUR

ce:]VOLTage[:LEVel]:PROTect:MODE Command..................................................................... B-26

B.97 [SOUR

ce:]VOLTage[:LEVel]:PROTect:MODE? Query ......................................................................... B-26

TABLE OF CONTENTS

SECTION PAGE

B.132 SYSTem:ERRor:CODE:ALL? Query ..................................................................................................... B-32

B.133 SYST

em:KEYBoard Command............................................................................................................. B-32

B.134 SYSTem:KEYBoard? Query.................................................................................................................. B-33

B.135 SYST

em:PASSword:CENable Command ............................................................................................ B-33

B.136 SYST

em:PASSword:CDISable Command........................................................................................... B-33

B.137 SYSTem:PASSword:NEW Command................................................................................................... B-33

B.138 SYST

em:PASSword:STATe? Query..................................................................................................... B-33

B.139 SYSTem:REMote Command ................................................................................................................. B-33

B.140 SYST

em:REMote? Query...................................................................................................................... B-33

B.141 SYSTem:SECurity:IMMediate Command............................................................................................. B-34

B.142 SYSTem:SET Command ....................................................................................................................... B-34

B.143 SYST

em:SET? Query ............................................................................................................................ B-34

B.144 SYSTem:VERSion? Query .................................................................................................................... B-34

B.145 TRIGger:SOURce Command................................................................................................................ B-35

B.146 TRIG

ger:SOURce? Query..................................................................................................................... B-35

LIST OF FIGURES

FIGURE TITLE PAGE

1-1 High Power BOP Series Power Supply......................................................................................................... x

1-2 1000W BOP Power Supply, Outline Drawing............................................................................................. 1-11

1-3 BOP Output Characteristics ....................................................................................................................... 1-16

2-1 BOP Series Rear Panel.............................................................................................................................. 2-1

2-2 Load Connections, Local Sensing.............................................................................................................. 2-12

2-3 Load Connections, Remote Sensing.......................................................................................................... 2-12

2-4 Parallel Configuration, Local Sensing, Typical ........................................................................................... 2-15

2-5 Parallel Configuration, Remote Sensing, Typical ....................................................................................... 2-16

2-6 Series Configuration, Local Sensing, Typical............................................................................................. 2-17

2-7 Series Configuration, Remote Sensing, Typical......................................................................................... 2-18

2-8 Typical Master/Slave Protection Interconnections ..................................................................................... 2-19

2-9 Master Power Up Screen ........................................................................................................................... 2-21

2-10 Power On Default Screen for Master Unit .................................................................................................. 2-22

2-11 Power On Default Screen for Slave Unit .................................................................................................... 2-23

2-12 3 x 2 (3 Series X 2 Parallel) Configuration, Local Sensing, Typical .......................................................... 2-25

3-1 BOP Series Front Panel ............................................................................................................................. 3-1

3-2 Front Panel Keypad.................................................................................................................................... 3-2

3-3 Power-up Screen Showing Graphic Meters ............................................................................................... 3-4

3-4 Power-up Screen Showing Time Line Graph ............................................................................................. 3-4

3-5 Password Protection Menu, Factory Defaults ............................................................................................ 3-9

3-6 General Setup Menu .................................................................................................................................. 3-14

3-7 Max/Min Settings Menu.............................................................................................................................. 3-15

3-8 Saved Setups Menu................................................................................................................................... 3-23

3-9 Saved Waveforms Menu............................................................................................................................ 3-26

LIST OF TABLES

TABLE TITLE PAGE

1-1 BOP 1000 Watt Model Parameters .............................................................................................................1-1

1-2 BOP General Specifications .......................................................................................................................1-2

1-3 Equipment Supplied ....................................................................................................................................1-15

1-4 Safety Symbols ...........................................................................................................................................1-15

1-5 Accessories .................................................................................................................................................1-17

2-1 Rear Panel Connector Functions ................................................................................................................2-2

2-2 IEEE 1118 Connector Input/Output Pin Assignments .................................................................................2-3

2-3 Trigger Port Pin Assignments .....................................................................................................................2-3

2-4 External Protection Connector Input/Output Pin Assignments ....................................................................2-3

2-5 RS232C PORT Input/Output Pin Assignments ...........................................................................................2-4

2-6 Parallel/Serial Control Out Port Pin Assignments .......................................................................................2-4

2-7 Parallel/Serial Control In Port Pin Assignments ..........................................................................................2-4

2-8 Parallel/Serial Protect In Port Pin Assignments ..........................................................................................2-5

2-9 Parallel/Serial Protect Out Port Pin Assignments .......................................................................................2-5

2-10 Analog I/O Port Input/Output Pin Assignments ...........................................................................................2-6

2-11 IEEE 488 Port Input/Output Pin Assignments .............................................................................................2-7

2-12 Multiple Units Menu Functions ....................................................................................................................2-20

2-13 Slave Status Message Definitions ..............................................................................................................2-22

3-1 Front Panel Controls and Indicators ...........................................................................................................3-2

3-2 Special Key Functions ................................................................................................................................3-3

3-3 Display (Operator Convenience) Menu Functions ......................................................................................3-10

3-4 Voltage and Current Parameter Definitions ................................................................................................3-13

3-5 Max/Min Settings Menu ..............................................................................................................................3-16

3-6 Power Supply Behavior when Output is set to OFF ....................................................................................3-20

SECTION 1 - INTRODUCTION

1.1 SCOPE OF MANUAL

This manual contains instructions for the installation, operation and servicing of the BOP series
of 1000 Watt rack-mounted, 4-quadrant bipolar, programmable, voltage and current stabilized d­c power supplies manufactured by Kepco, Inc., Flushing, New York, U.S.A.

NOTE:This manual does not apply to units with Firmware Rev less than 2.0.

1.2 GENERAL DESCRIPTION

The BOP Series (Figure 1-1), hereafter referred to as BOP, are true 4-quadrant programmable
voltage and current power supplies, meaning they are capable of both sourcing and sinking
power. These bipolar power supplies pass smoothly through zero without switching to provide
true ± voltage and ± current. These BOP power supplies use switch mode technology for low
dissipation. A bi-directional, isolating, a-c input power factor correcting (PFC) circuit recuperates
energy sinked from an active load and sends it back into the line to maintain low dissipation.

These BOP power supplies are controlled digitally from a menu-driven front-panel keypad or
one of the standard remote digital interfaces (GPIB or RS 232) to set voltage and current and
the four protection limits (+voltage, –voltage, +current and –current.) A front panel rotary
adjuster allows real-time adjustment of the output. A large LCD displays the settings, mode and
the actual output voltage and current. Additionally, these BOP models can be remotely con­trolled by an analog ±10V input for the main channel (voltage or current), and a +1 to +10V input

TABLE 1-2. BOP GENERAL SPECIFICATIONS

SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION

INPUT CHARACTERISTICS

a-c voltage nominal 230 Va-c

Single phase

range 176 - 264 Va-c

Frequency nominal 50-60 Hz

range 47 - 63 Hz

Current 176 Va-c 9.5A maximum

264 Va-c 6.4A maximum

Power factor

Source 0.99 minimum

nominal output power

Sink 0.97 minimum

Efficiency 65% minimum when sourcing

Switching frequency 70 KHz PFC Stage

EMC Compliance EN61326-1 (1997) Class A equipment

EMC immunity to: ESD EN61000-4-2 Electrostatic discharge

Radiated RF EN61000-4-3

EFT EN61000-4-4 Electrical fast transient/burst

Surges EN61000-4-5

Conducted RF EN61000-4-6

OUTPUT CHARACTERISTICS (Continued)

Sustain Output update rate 400 updates/sec voltage or current

Readback measurement rate 5 ms

measurement array 64 samples voltage and current

step change timing 40

µsec (default) Allows rejection of line-related ripple/noise by

changing response time for output step
change (see PAR. B.9).

Voltage stabilization in
voltage mode

source effect 0.05% of rating min-max input voltage

load effect 0.1% of rating 0-100% load current

time effect (drift) 0.02 of rating 0.5 through 8 hours

temperature effect 0.02%/deg C of rating 0 to 50 deg C

ripple and noise 2% E0max p-p Includes switching noise

Current stabilization in
current mode

source effect 0.05% of rating min-max input voltage

load effect 0.2% of rating 0-100% load voltage

time effect (drift) 0.02% of rating 0.5 through 8 hours

temperature effect 0.02%/deg C of rating 0 to 50 deg C

ripple and noise 2% I0max p-p Includes switching noise

TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued)

SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION

PROGRAMMING/DISPLAY CHARACTERISTICS

Analog I/O Port
(See Table 2-10)

Main channel

(voltage or current)

–10V to +10V Full range output, 20K Ohm input impedance

(see PAR. 3.4)

Protection Limit

channels:

(±Voltage, ±Current)

+1V to +10V 10% to 100% of Nominal Range. Input voltage

clamped to 12V through 1K ohms. Maximum
of 0.15mA input current at1V input voltage.

Mode Control Voltage: open circuit or TTL logic 1

Current: short circuit or TTL logic 0

Available only when digitally activated through
Power-up setting..

Output Current

Analog Readback

0 to ±10 Volts corresponds to zero to

± Full Scale nominal output current

Output impedance of this signal is 2K Ohms.

External Protection Port
(see Table 2-4)

External Shutdown Isolated input for shutdown of the

BOP (latched status)

Pulse width: 100 microseconds min.
Action delay: 100 microseconds max
Restore operation by cycling input power or
pressing RESET key.

External Shutdown

Flag

Isolated output indicating

shutdown status)

Action delay: 100 microseconds max

External On-Off

Flag

Isolated output indicating

output on (enabled, STANDBY off) or

off (disabled, STANDBY on) status)

Action delay: 200 milliseconds max

Trigger Port
(See Table 2-3)

External Trigger

Shutdown

Isolated input for setting the BOP

in STANDBY (output off)

Pulse width: 100 microseconds min.
Action delay: 200 milliseconds max

TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued)

SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION

FUNCTION GENERATOR CHARACTERISTICS (Continued)

Types of Basic waveforms Sine (Sinusoidal waveform)

Triangle (Triangular waveform)

Pos. Ramp (Ramp waveform)

Neg. Ramp (Sawtooth waveform)

Square (50% Duty Cycle Pulse)

Level (DC waveform)

Maximum number of points per basic wave­form

Local: 3933

Count (Number of repetitions) Range: 1 to 255

For Count = 0 the waveform is exe-

cuted indefinitely until stop com-

mand is sent

• Local: When the count is complete or if
execution is stopped using

%, the output

of the unit is set to OFF (Standby indicator
lit). Output must be enabled (press
STANDBY) to execute the waveform
again.

• Remote: When the count is complete or
the waveform is stopped using the
VOLT:MODE FIX command, the output
remains at last output value.

Waveform Name 10 characters maximum

Waveform Parameters Type: Voltage or Current

Positive Protection Limit:

• Type of waveform, voltage or current, can
be selected only for a new waveform and
consequently applies to all waveform seg-

TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued)

SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION

FUNCTION GENERATOR CHARACTERISTICS (Continued)

LIST command characteristics for "string" type
waveform (Remote only)

Maximum number of points

• For single (global) dwell time:
5900 (high resolution)

• For <126 different dwell times:
3933

• For >126 different dwell times:
2950

Dwell time range: 93usec to 34msec.

Dwell time resolution (increment):

0.751usec

Skip feature (a number of steps can
be skipped from the LIST at the first
run using LIST:COUN:SKIP.)

Able to synchronize a LIST command
with multiple BOP’s or other devices
using Trigger Port (see Table 2-4
NOTE).

Able to sample output voltage or cur­rent during LIST command execu­tion (see Figures B-2 and B-3).

Note: Dwell time list must match (balance) the
amplitude list.

TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued)

SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION

FUNCTION GENERATOR CHARACTERISTICS (Continued)

Amplitude Range

Main Channel Voltage (Volts p-p) 0 to 2 x E

O

NOM

Sine, Triangle, Square, ±Ramp

Current (Amperes

p-p)

0 to 2 x I

O

NOM

Sine, Triangle, Square, ±Ramp

Protection Limit Channel . Current, bipolar

(Amperes)

0 to I

O

NOM

(set once for all segments)

Voltage, bipolar

(Volts)

0 to E

O

NOM

Offset Voltage (Volts)

–E

O

NOM

to +E

O

NOM

Applies to offset of sine, triangle, ±ramp, and
square waveforms and to Level waveform
Amplitude.

Current (Amperes) –I

O

NOM

to +I

O

NOM

Amplitude Resolution (Programming)

Main Channel and Off-

set

Voltage (millivolts a-

c)

.35 Sine

(millivolts d-c) 1 Triangle, Square, ±Ramp, Level:

Current (milliamperes a-c) .35 Sine

(millivolts d-c) 1 Triangle, Square, ±Ramp, Level:

TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued)

SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION

SAVE/RECALL CHARACTERISTICS (See PAR. 3.3.8)

Number of Locations 99

Parameters Saved or Recalled All parameters saved for power-up.

Mode of operation Voltage, Current or External For External the operating mode is deter-

mined by signal at I/O Port; no signal selects
voltage mode (see PAR. 3.4.2).

Reference type Internal, External or

External Reference Level

Main channel

Internal, External or

Lesser Limit

Limit channel

Main Amplitude

(Internal)

0 to E

O

NOM

or I

O

NOM

(internal or external)

Main Channel:
Voltage (Volts) for Voltage mode,
Current (Amperes) for Current mode

Protection Limit Amplitude

(Internal)

E

O

MIN

or I

O

MIN

to

1.01 E

O

NOM

or I

O

NOM

Limit Channel, Positive and Negative
Voltage (Volts) for Current mode,
Current (Amperes) for Voltage mode

Output status ON or OFF

MISCELLANEOUS FEATURES

Maximum/Minimum Settings

Protection Limit

Bipolar (default) or Independent

TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued)

SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION

MISCELLANEOUS FEATURES (Continued)

Power-up Settings Mode Voltage (default) or Current

Main Channel

Reference Type

Internal (default), External or External

Reference Level (Gain Mode)

Protection Limit Channel

Reference type

Internal (default), External

or Lesser Limit

Applies to Limit channel

Protection Limit

Levels

(Internal)

E

O

MIN

or I

O

MIN

to

1.01 E

O

NOM

or I

O

NOM

Voltage (Volts) for Current mode,
Current (Amperes) for Voltage mode

Output status On (default) or Off

Password

Types

Main, Admin1, Admin2

Factory defaults: Main: DEFAULT,
Admin1: A, Admin2: KEPCO

Protection Choices Unprotected, Main, Admin1, Admin2 Password menu always protected by Admin2

Items Protected Interface, max/min , Load type, Test,

Calibration, Power-up, Keypad @

local, Keypad lockout at power-up,

Save Display Chg

(See Figure 3-5 for defaults)

Multiple unit configurations are protected by
Admin2 password.

Save Display Chg choice is Enable or Dis­able; when set to Disable, prevents changes
made to the display settings from being saved
for power up.

Series, Parallel, Series x Parallel configura-

Single, Parallel, Series, 2 X 2, 3 X 2 2 X 2 is two parallel branches of two series-

TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued)

SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION

PHYSICAL CHARACTERISTICS

Dimensions English 5.25' X 19" X 21.5" H X W X D

metric 133.3mm X 482.6mm X 546.1mm H X W X D

Weight, 1000W models English 53 lbs

metric 24.1Kg

Connections Source power 3-pin IEC connector

Load connections Nickel-plated copper bus bars

Sensing Output

Terminal Block

7-pin terminal block Default: 3 links installed for local sensing and

ground network connected.

Analog I/O control

port

15-pin D female See Figure 2-1, Table 2-10

PAR/SER CTRL IN

port

8-pin mini DIN connector See Figure 2-1, Table 2-7

PAR/SER CTRL OUT

port

4-pin mini DIN connector See Figure 2-1, Table 2-6

PAR/SER PROT IN

port

8-pin phone jack See Figure 2-1, Table 2-8

PAR/SER PROT OUT

port

8-pin phone jack See Figure 2-1, Table 2-9

EXT PROT port 6-pin phone jack See Table 2-4

TABLE 1-2. BOP GENERAL SPECIFICATIONS (Continued)

SPECIFICATION RATING/DESCRIPTION RATING/DESCRIPTION

1.4 LOCAL CONTROL

Either the front panel keypad or the adjust control can set and adjust output voltage and current
under local control. The display provides a digital display of output voltage and current as well
as a pictorial display of real-time analog voltage and current meters.

The keypad includes five function keys which provide access to the menu-driven functions of
the unit. The menu screens provide access to save the unit’s settings, recall previously saved
settings, configure or execute a waveform, display references or configure the unit by setting
GPIB address, Serial protocols, maximum acceptable voltage and current, etc. (see PAR. 3.3
for details on local control).

Context-sensitive help screens are available by pressing the HELP key. Actual output voltage
and current displays are available while the help screens are displayed.

1.5 REMOTE CONTROL

The BOP Power Supply can be remotely controlled directly via either the IEEE 488.2 (GPIB)
bus (see PARs. 3.5 and 3.5.4) or RS232C (see PAR.3.5.6) interface using SCPI commands
(see and Appendix A and B). Most features available in local mode can also be accessed
remotely via the digital interface. The unit can be controlled with a VISA (Virtual Instrumentation
Software Architecture) driver to facilitate remote programming of the BOP Power Supply (see
PAR. 3.5.5). The VISA driver is an interface written in standard C language which adds the
proper SCPI syntax to commands sent to the BOP.

1.6.3 WAVEFORMS

The BOP models have the capability to make the output follow complex waveforms. These may
be generated either externally, using an analog reference voltage (see PAR. 1.6.6), or internally,
using user-generated waveforms.

Up to 16 user-generated waveforms can be stored for later use. The user selects the operating
mode, positive and negative protection levels, and a count (the number of times the waveform is
to be repeated). Each waveform consists of up to 10 segments; each segment is assigned one
of six basic waveform types: square, sine, triangle, negative ramp, positive ramp and level.
Depending on the waveform type, frequency, peak-to-peak amplitude, offset, and start and stop
phase angle are then assigned by the user.

Segments at the beginning of the waveform can be programmed to be executed only once, or to
be repeated as specified by the count. A graphic representation on the LCD shows the wave­form as segments are added and is displayed prior to execution. This feature provides unique
versatility for generating a waveform that meets user requirements. Refer to PAR. 3.3.9 for fur­ther details.

1.6.4 SAVING AND RECALLING SETTINGS

The BOP offers 99 memory locations accessible from the front panel that can be used to store a
set of operating parameters for later use. For each location, the user can store operating mode,
output on/off, Main channel reference type and value, and protection reference type and value.

configuration triples the output voltage and doubles the output current. If a series/parallel config­uration is enabled, communication between the master BOP and those configured as slave
units occurs via the BITBUS. Refer to PAR. 2.8 for further details.

1.6.9 ENERGY RECUPERATION

The BOP is a four-quadrant device as shown in Figure 1-3. Operating as a source, it delivers
energy into a passive load, and as a sink it operates as an electronic load, absorbing and dissi­pating energy from an active load. To minimize energy dissipation, the BOP employs energy
recuperation, where energy sinked from an active load is passed backwards through the output
circuit and the bidirectional input power factor correcting circuit to the a-c power lines, where it
becomes available for reuse. This technology allows high power levels using switch-mode tech­nology while maintaining high efficiency and reduced size and weight.

1.7 EQUIPMENT SUPPLIED

Equipment supplied with the BOP power supply is listed in Table 1-3.

TABLE 1-3. EQUIPMENT SUPPLIED

ITEM FUNCTION

PART NUMBER

Source Power Entry mating connector Mates with source power entry connector 142-0381 (Kepco) (IEC 320)

PAR/SER CONTROL - IN

Mates with PAR/SER CONTROL - IN port to allow

142-0488 (Kepco)

TABLE 1-5. ACCESSORIES

ITEM FUNCTION

PART NUMBER

Mating Connector, Trigger Mates with Trigger port. 142-0527 (Kepco)

SP2501 (CUI Stack)

IEEE 1118 (BITBUS)
Mating connector

Allows connection to IEEE 1118 (BITBUS) port. 142-0485 (Kepco)

KMDLA-5P (Kycon Inc.)

IEEE 488 Cable, (1 meter long) Connects BOP power supply to GPIB bus. SNC 488-1

IEEE 488 Cable, (2 meter long) Connects BOP power supply to GPIB bus. SNC 488-2

IEEE 488 Cable, (4 meter
longs)

Connects BOP power supply to GPIB bus. SNC 488-4

Interconnection Kit for multiple
identical power supplies in par­allel (increase output current)

Cables required to connect multiple BOP models in parallel for
increased current capability, e.g., connecting two BOP 10­75MG models in parallel to produce a virtual BOP 10-150MG.

KIT 219-0449 (2 in parallel)
KIT 219-0446 (3 in parallel)
KIT 219-0447 (4 in parallel)
KIT 219-0448 (5 in parallel)

Interconnection Kit for multiple
identical power supplies in
series (increase output voltage)

Cables required to connect multiple BOP models in series for
increased voltage capability, e.g., connecting two BOP 10­75MG models in series to produce a virtual BOP 20-75MG.

KIT 219-0443 (2 in series)
KIT 219-0444 (3 in series)

Interconnection Kit for multiple
identical power supplies con­nected in two parallel branches

Cables required to connect two parallel branches of series con­nected power supplies.
KIT 219-0480 is used for 2 parallel connected branches of 2

KIT 219-0480 (2 in series X 2

parallel branches)

KIT 219-0481 (3 in series X 2

Slides Allows easy withdrawal of unit from rack (see Figure 1-2).

(Model CS 04 includes slides, brackets, all mounting hardware
and installation instructions.)

CS 04

Heat Sink Provides adequate cooling for calibration sense resistors. 136-0451

TABLE 1-5. ACCESSORIES (CONTINUED)

ITEM FUNCTION

PART NUMBER

SECTION 2 - INSTALLATION

2.1 UNPACKING AND INSPECTION

This instrument has been thoroughly inspected and tested prior to packing and is ready for
operation. After careful unpacking, inspect for shipping damage before attempting to operate.
Perform the preliminary operational check as outlined in PAR. 2.3. If any indication of damage is
found, file an immediate claim with the responsible transport service.

2.2 TERMINATIONS AND CONTROLS

a) Front Panel: Refer to Figure 3-1 and Table 3-1.

b) Rear Panel: Refer to Figure 2-1 and Table 2-1.

TABLE 2-1. REAR PANEL CONNECTOR FUNCTIONS

NUMBER

(FIGURE 2-1)

CONNECTOR/TERMINAL

(REFERENCE DESIGNATOR)

FUNCTION

1

IEEE 1118 (BITBUS)

PORT

(1)

(connector A1J4)

Used for multiple identical BOP master/slave parallel, and series and series-parallel
configurations (refer to PAR. 2.8, see Table 2-2).

2

TRIGGER

(connector A1J3)

May be used to initiate BOP output. (See Table 2-3.)

3

IEEE 488 (GPIB) PORT

(connector A1J6)

Used for Remote control of the BOP via the IEEE 488 (GPIB) interface (See Table
2-11.)

4

ANALOG I/O PORT
(connector A2A5J6)

Provides interface for analog input/output signals. (See Table 2-10.)

5

PARALLEL/SERIAL

CONTROL PORT

(connectors A2A5J3, IN

and A2A5J4, OUT)

Provides interconnections used to control parallel or serial configurations of identi­cal BOP’s as a single power supply (see Table 2-7 for A2A5J3, IN and Table 2-6 for
A2A5J4, OUT).

6

PARALLEL/SERIAL

PROTECT PORT

(connectors A2A5J1, IN

and A2A5J2 OUT)

Provides interconnections used to control protection shutdown of power supplies
connected in parallel or serial configurations (see Table 2-8 for A2A5J1, IN and
Table 2-9 for A2A5J2, OUT).

7

EXT PROTECT PORT

(connector A2A5J7)

Provides means for controlling protection via external circuitry and provides status
flags to external circuitry. (See Table 2-4.)

TABLE 2-2. IEEE 1118 CONNECTOR INPUT/OUTPUT PIN ASSIGNMENTS

CONNECTOR PIN SIGNAL NAME FUNCTION

IEEE 1118 (BITBUS)

PORT

(connector A1J4)

1, 3 (shorted) CONTROL BUS “A”

IEEE 1118, referenced to pins 5, 8
(2-Wire Differential Interface)

5, 8 (shorted) CONTROL BUS “B”

IEEE 1118, referenced to pins 1, 3
(2-Wire Differential Interface)

6TERMINATOR

Connect to pin 5 or 8 to add an internal termination resistor
to first/last unit on the daisy chain.

TABLE 2-3. TRIGGER PORT PIN ASSIGNMENTS

CONNECTOR PIN SIGNAL NAME FUNCTION

TRIGGER PORT
(connector A1J3)

1 LOGIC GND Return for TRIGGER and SHUTDOWN signals.

2SHUTDOWN

Logic 0 disables the output and puts the unit in standby, how­ever Logic 1 (TTL or 5V CMOS level) does NOT enable the
output. STANDBY key or a remote OUTP ON command must
be used to enable the output. Response to this signal is rela­tively slow (200mS max).

3 NOT USED

4 EXT. TRIGGER INPUT

Logic 0 causes a trigger event. Logic 1 (TTL or 5V CMOS
level) rearms the trigger feature.

TABLE 2-5. RS232C PORT INPUT/OUTPUT PIN ASSIGNMENTS

CONNECTOR PIN SIGNAL NAME FUNCTION

RS 232

PORT

A1J5

1 RTS Request To Send (protocol not used)

2RXD Receive Data

3 TXD Transmit Data

4 LOGIC GND Logic Ground

5 LOGIC GND Logic Ground

6 CTS Clear To Send (protocol not used)

TABLE 2-6. PARALLEL/SERIAL CONTROL OUT PORT PIN ASSIGNMENTS

CONNECTOR PIN SIGNAL NAME FUNCTION

PAR ALLE L/SE RIAL

CONTROL OUT

PORT

(A2A5J4)

1 SGND Local signal ground

2 No connection

3

S_IN_PARALLEL Relayed signal for daisy chain connection. (See PARALLEL/SERIAL IN

PORT (A2A5J3) pin 3)

4 No connection

TABLE 2-7. PARALLEL/SERIAL CONTROL IN PORT PIN ASSIGNMENTS

CONNECTOR PIN SIGNAL NAME FUNCTION

TABLE 2-8. PARALLEL/SERIAL PROTECT IN PORT PIN ASSIGNMENTS

CONNECTOR PIN SIGNAL NAME FUNCTION

PARALLEL/SERIAL
PROTECT IN PORT

(A2A5J1)

1

SD_A Anode of LED optocoupler which is part of protection circuit for parallel

or series combination. Cathode of LED is connected to PARALLEL/
SERIAL PROTECT OUT PORT (A2A5J2) pin 1 (see Table 2-9). When
activated, the optocoupler shuts down the unit. LEDs from all units of the
parallel or series combination are connected in series.

2

PGOUT_C Collector of optocoupler transistor which is part of protection circuit for

parallel or series combination. Transistor emitter is connected to PAR­ALLEL/SERIAL PROTECT OUT PORT (A2A5J2) pin 2 (see Table 2-9).
When unit is operating normally, transistor is saturated. Transistors from
all units of the parallel or series combination are connected in series.

3

SD_RETURN Completes return connection for the protection circuit which receives

energy from the master unit.

4 No connection

5 No connection

6 No connection

7 GND Local power ground.

8

ALLOW EXT_ERR Provides energy for the protection circuit (master unit only). Disabled at

power up to prevent shutdown during power up.

TABLE 2-9. PARALLEL/SERIAL PROTECT OUT PORT PIN ASSIGNMENTS

CONNECTOR PIN SIGNAL NAME FUNCTION

1

SD_K Cathode of LED optocoupler which is part of protection circuit for parallel

or series combination. (See IN port (A2A5J1) pin 1,Table 2-8.)

TABLE 2-10. ANALOG I/O PORT INPUT/OUTPUT PIN ASSIGNMENTS

CONNECTOR PIN SIGNAL NAME FUNCTION

ANALOG I/O

PORT

A2A5J6

CAUTION: IT IS RECOMMENDED THAT SOURCE POWER OF EXTERNAL EQUIPMENT CON-

NECTED TO THE ANALOG PORT BE APPLIED THROUGH AN ISOLATING TRANS­FORMER TO AVOID GROUND LOOPS OR POSSIBLE DAMAGE TO THE BOP DUE TO
INCORRECT EQUIPMENT A-C WIRING (E.G., DEFEATING OF GROUND CONNECTION).

1NC

2VM-/CM

External input signal, TTL logic referenced to pin 9, controls the mode
of operation when using external reference (goes to the digital board
that changes VM-/CM signal). Logic 0 (or pin grounded) = current
mode, logic 1 (or pin not connected, the default) = voltage mode (see
PAR. 3.4.2).

3 IOUT_DMM

Output analog signal through 2K ohm resistor referenced to pin 4 for
monitoring overall output current, 0V to ± 10V corresponds to zero to ±
full scale current.

4 SGND Signal Ground used for IOUT_DMM (pin 3) return.

5 – I_LIM_EXT

Analog input signal referenced to pin 12, 0V to +10V sets the negative
current limit between zero and –I

Omax

, +10V corresponds to rated
maximum current (e.g., for BOP 36-28MG +10V sets negative current
limit to –28A) (see PAR. 3.4.4). Open = disabled (see NOTE 1).

6 – V_LIM_EXT

Analog input signal, 0V to +10V, sets the negative voltage limit
between zero and –E

Omax

, +10V corresponds to rated maximum volt-

age (e.g., for BOP 36-28MG +10V sets negative voltage limit to –36V).

1. With POWER switch set to off position, connect the power supply to source power (see PAR.

2.5.2).

2. With no load connected, set POWER switch to the ON position. Each time the unit is turned
on an internal self-test is performed. The alphanumeric display (LCD) shows the processor
firmware revision history and lists various tests performed during the internal self-test. As
each test is completed, PASS or FAIL is displayed. If all tests pass, the unit goes into the
default mode. If a failure occurs, the failure is displayed. Figure 3-3 shows the factory config­ured power on defaults displayed on the LCD.

TABLE 2-11. IEEE 488 PORT INPUT/OUTPUT PIN ASSIGNMENTS

CONNECTOR PIN SIGNAL NAME FUNCTION

1D

I01 I/O Line

2D

I02 I/O Line

3D

I03 I/O Line

4D

I04 I/O Line

5 EOI End or Identify

6 D AV Da ta Vali d

7 NRFD Not Ready for Data

8 NDAC Not Data Accepted

9 IFC Interface Clear

2.4 INSTALLATION

2.4.1 RACK MOUNTING

The unit is shipped with four feet attached to bottom of the unit which must be removed prior to
installation (see Figure 1-2). The BOP is designed to be rack mounted in a standard 19-inch
wide rack using the mounting ears (supplied) attached to the front panel (see Figure 1-2). Allow
a minimum of 7/8 in. (22.2 mm) above and below the unit to permit air intake necessary for
proper cooling of the unit. CAUTION: THE RACK MUST PROVIDE SUPPORT AT THE REAR

(WITHIN 6 INCHES OF THE REAR PANEL). OPTIONAL SLIDES CAN ALSO BE USED (SEE
PAR. 2.4.2).

2.4.2 SLIDE INSTALLATION

Optional slides are available for rack mounting (see Table 1-5 and Figure 1-2).

2.5 WIRING INSTRUCTIONS

Interconnections between an a-c power source and a power supply, and between the power
supply and its load are as critical as the interface between other types of electronic equipment.
If optimum performance is expected, certain rules for the interconnection of source, power sup­ply and load must be observed by the user. These rules are described in detail in the following
paragraphs.

One of the most important considerations in establishing a successful grounding scheme is to
avoid GROUND LOOPS. Ground loops are created when two or more points are grounded at
different physical locations along the output circuit. Due to the interconnection impedance
between the separated grounding points, a difference voltage and resultant current flow is
superimposed on the load. The effect of this ground loop can be anything from an undesirable
increase in output noise to disruption of power supply and/or load operation. The only way to
avoid ground loops is to ensure that the entire output/load circuit is fully isolated from ground,
and only then establish a single point along the output/load circuit as the single-wire ground
point.

The exact location of the “best” d-c ground point is entirely dependent upon the specific applica­tion, and its selection requires a combination of analysis, good judgement and some amount of
empirical testing. If there is a choice in selecting either the OUTPUT or COMMON output termi­nals of the power supply for the d-c ground point, both sides should be tried, and preference
given to the ground point producing the least noise. For single, isolated loads the d-c ground
point is often best located directly at one of the output terminals of the power supply; when
remote error sensing is employed, d-c ground may be established at the point of sense lead
attachment. In the specific case of an internally-grounded load, the d-c ground point is automat­ically established at the load.

The output and common terminals of BOP power supplies are d-c isolated (“floating”) from the
chassis in order to permit the user maximum flexibility in selecting the best single point ground
location. Care must be taken in measuring the ripple and noise at the power supply: measuring
devices which are a-c line operated can often introduce additional ripple and noise into the cir-

The stabilized d-c power supply is definitely not an ideal voltage or current source, and practical
interfaces definitely fall short of the ideal. All voltage-stabilized power supplies have a finite
source impedance which increases with frequency, and all current-stabilized power supplies
have a finite shunt impedance which decreases with frequency. The method of interface
between the power supply output and the load must, therefore, take into account not only the
size with regard to minimum voltage drop, but the configuration with regard to minimizing the
impedance introduced by practical interconnection techniques (wire, bus bars, etc.). The series
inductance of the load wire must be as small as possible as compared to the source inductance
of the power supply: although the error sensing connection to the load compensates for the d-c
voltage drop in the power leads, it cannot compensate for the undesirable output effects of the
power lead inductance. These lead impedances (both power and sensing leads) are especially
important if the load: is constantly modulated or step-programmed; has primarily reactive char­acteristics; or where the dynamic output response of the power supply is critical to load perfor­mance.

2.5.5 LOAD CONNECTION - GENERAL

Load connections to the BOP power supply are achieved via the OUTPUT and COMMON bus
bar-type terminals located on the rear panel. A barrier strip is provided at the rear panel for con­nection of the sense wires to the load (for remote sensing or multiple unit applications).

CAUTION: NEVER CONNECT THE LOAD TO THE SENSE TERMINALS. MONITORING

INSTRUMENTS (E.G., DVM, ETC.) ARE THE ONLY EXTERNAL EQUIPMENT
THAT MAY BE SAFELY CONNECTED TO THE SENSE TERMINALS.

2.5.6 LOAD CONNECTION USING LOCAL SENSING

Figure 2-2 shows a typical configuration using local sensing and a grounded load; for local
sensing with an isolated (“floating”) load, do not install the ground connection (see Figure. 2-2,
Note 2).

2.5.7 LOAD CONNECTION USING REMOTE SENSING

Figure 2-3 shows a typical configuration using remote sensing and a grounded load; for remote
sensing with an isolated (“floating”) load, do not install the ground connection (see Figure. 2-3,
Note 2).

2.6 COOLING

The power devices used within the power supply are maintained within their operating tempera­ture range by means of internal heat sink assemblies and by two cooling fans. Periodic cleaning
of the power supply interior is recommended. If the power supply is located within a confined
space, take care that the ambient temperature, which is the temperature of the air immediately
surrounding the power supply, does not rise above the specified limits (see Table 1-2).

2.7 SETTING UP THE UNIT

The following paragraphs describe the connections and initial BOP setup needed to operate in
the desired mode.

FIGURE 2-2. LOAD CONNECTIONS, LOCAL SENSING

2.7.3 SETUP FOR REMOTE OPERATION VIA GPIB

With all power off, connect the load to the BOP using either local or remote sensing. If units are
to be connected in series or parallel, refer to PAR. 2.8. Connect the GPIB connector to the GPIB
port (see Figure 2-1 and Table 2-1). Turn power on and refer to PAR. 3.2 for power supply
basics and PAR. 3.5 for remote mode programming.

The default GPIB address is 6; to change it refer to PAR 3.5.3.1. The default configuration
allows both local and remote operation; to prevent local operation once the unit is being con­trolled from the GPIB, see PAR. B.133. Refer to PAR. 3.5.3.1 to configure the GPIB Port.

SCPI programming is described in PAR. 3.6; Appendices A and B provide syntax for SCPI com­mon and subsystem commands and queries implemented in this unit. All the features described
for Local Mode operation can be accomplished using remote SCPI commands.

2.7.4 SETUP FOR REMOTE OPERATION VIA RS 232C

With all power off, connect the load to the BOP using either local or remote sensing (refer to
PAR. 2.5). If units are to be connected in series or parallel, refer to PAR. 2.8. Connect the RS
232 connector to the RS 232 port (see Figure 2-1 and Table 2-1). Turn power on and refer to
PAR. 3.2 power supply basics and PAR. 3.5.6 for RS 232 operation. SCPI programming is
described in PAR. 3.6; Appendices A and B provide syntax for SCPI common and subsystem
commands and queries implemented in this unit. Refer to PAR. 3.5.3.2 to configure the RS 232
Port.

three series-connected units. These figures allow other configurations, e.g., five parallel-con­nected units or two series connected units, etc. to be easily deduced Figure 2-12 show the con­nections for a typical 3 X 2 (two parallel branches each consisting of three series-connected
units) configuration, as well as simplified diagrams showing required arrangements for 2 X 2
and 3 X 2 configurations to allow the user.

CAUTION: FOR PARALLEL CONFIGURATIONS, REMOVE LINKS BETWEEN (COM S)

AND (COM OUT) TERMINALS OF ALL SLAVES TO PREVENT DAMAGE TO
THE UNIT AND MAINTAIN SYSTEM ACCURACY.

The following connections are required.

• Power cables

• Sense connections (either local or remote)

• All interconnection cables and terminations required for parallel, series, 2 X 2 or 3 X 2
configurations are supplied in the applicable Interconnection Kit (see Table 1-5 for part
number).

2.8.1 MULTIPLE UNIT SOURCE POWER

Multiple units must all be connected to the same a-c input power source.

TABLE 2-12. MULTIPLE UNITS MENU FUNCTIONS

SETTING

CHOICES

(BOLD = Factory Default)

FUNCTION

CONFIGURATION STANDALONE

PARALLEL

SERIES
MASTER 2 X 2
MASTER 3 X 2

STANDALONE - Unit operates independently, no additional units connected.
PARALLEL - Unit to be configured for parallel operation; opens UNIT TYPE
and CONNECTION TYPE options shown below. Used when units are con­nected in parallel (increase output current) (see NOTE below).
SERIES - Unit to be configured for series operation; opens UNIT TYPE and
CONNECTION TYPE options shown below. Used when units are connected
in series (increase output voltage) (see NOTE below).
MASTER 2 X 2 - Unit configured as master in control of two parallel branches
comprised of two series connected units. Used when units are connected in
parallel and series to double output voltage and current (see NOTE below).
MASTER 3 X 2 - Unit configured as master in control of two parallel branches
comprised of three series connected units. Used when units are connected in
parallel and series to triple output voltage and double output current (see
NOTE below).

UNIT TYPE
(for parallel and series
selections only)

STANDALONE

MASTER +1
MASTER +2
MASTER +3
MASTER +4

SLAVE #1
SLAVE #2
SLAVE #3

STANDALONE - Unit operates independently, no additional units connected.
MASTER+1 - Unit is the master (controller), with one slave unit connected.
MASTER+2 - Unit is the master (controller), with two slave units connected.
MASTER+3 - Unit is the master (controller), with three slave units connected.
MASTER+4 - Unit is the master (controller), with four slave unit connected.
SLAVE #1 - Unit is slave no. 1 in configuration using one to five slave units.
SLAVE #2 - Unit is slave no. 2 in configuration using two to five slave units.
SLAVE #3 - Unit is slave no. 3 in configuration using three to five slave units.

a. From the power-up screen press

% to enter the General Setup Menu. Highlight Series/

Parallel and press

! to view the Multiple Units menu (see Table 2-12). When

prompted, enter ADMIN2 password (see PAR. 3.2.4.4) before continuing.

b. From the Multiple Units menu, highlight Configuration (use ADJUST control or the

Y

or U keys) and press ! to modify. Select Series, Parallel, Master 2X2 or Master
3X2, press

$ to apply the change.

c. If Series or Parallel was selected in step b above, Connection Type shows

Series or Parallel as selected above. Highlight Unit Type and press

! to modify.

Highlight Master +1

, Master +2, Master +3, or Master +4 (Master +3, or Mas-

ter +4 not permitted for series connections) and press $ to apply the change.

d. Exit the Multiple Units menu by pressing

$ to save the settings for subsequent power-up

cycles. The display shows the master power-up screen (see Figure 2-9).

e. Turn off power to the master, then turn on power to the master.

f. The power-up master module screen (Figure 2-9) shows the status of the slave(s). Refer

to Table 2-13 for an explanation of status indications for the slave(s).

If all the slaves are recognized as ready, after about 10 seconds the master LCD reverts to the
Power On Default screen (see Figure 2-10). The slaves display the Slave Power On Default
screen (see Figure 2-11), except the unit will be in Current Mode for parallel configurations and
Voltage mode for series configurations and the message will indicate the unit is operating as a
slave. The slave number appears at the lower left of the display. For instructions to return the
slave to standalone operation, refer to PAR. 2.8.5. The fault indicators on all units are off.

If the master power-up screen is still displayed after 10 seconds, a slave was not properly rec­ognized. Pressing

% or turning power off, then on again, reconfigures the unit as a standalone

unit. Verify that the BITBUS cable is installed correctly. Verify that the slave has been properly
configured as a slave per step 1 above. Repeat step 3. If the power up screen still does not
revert to the power on default screen, refer to troubleshooting.

4. Adjust the limits to reflect the increased power capacity of the multiple unit combination as
follows:

TABLE 2-13. SLAVE STATUS MESSAGE DEFINITIONS

Slave Status Message

Displayed on Master Power Up Screen

(see Figure 2-9)

MEANING

Ready Unit is ready for operation.

STANDBY

If unit’s FAULT indicator is off, hardware error has NOT been detected,
output is ready to be turned on

Powered OFF Unit is not responding to polls via BITBUS.

Failed

Unit’s FAULT indicator is on to indicate a hardware error has been
detected.

Not Used Unit is not part of parallel configuration

Unknown Waiting for interface communication

FIGURE 2-11. POWER ON DEFAULT SCREEN FOR SLAVE UNIT

2.8.4 OPERATING INSTRUCTIONS FOR MULTIPLE UNIT COMBINATIONS

2.8.5 RESTORING A UNIT TO STANDALONE OPERATION

1. Turn off power to the master.

2. Turn off power to the slave(s).

3. Turn on power to the unit to be restored to standalone operation.

4. From the power-up screen press

% to enter the General Setup Menu. Highlight Series/

Parallel and press

! to view the Multiple Units menu (see Table 2-12). When prompted,

enter ADMIN2 password (see PAR. 3.2.4.4) before continuing.

5. Press

@ to return to factory defaults. This configures the unit as a standalone unit.

6. Press

$ to save for power-up.

7. Turn off power to the unit, then turn power on. The unit will power up as a standalone unit.

2.8.6 CHANGING MULTIPLE UNIT CONFIGURATIONS

To change a unit from series, parallel, Master 2X2 or Master 3X2 operation to a different config­uration, first set the unit to Standalone by referring to PAR. 2.8.5, then refer to PAR. 2.8.3 and
configure as desired.

080709 C-25

FIGURE 2-12. 3 X 2 (3 SERIES X 2 PARALLEL) CONFIGURA-

TION, LOCAL SENSING, TYPICAL

2-25/(2-26 Blank)

-24/(-25

SECTION 3 - OPERATION

3.1 GENERAL

This section explains how to operate the 1000 Watt BOP Power Supply. The power supply can
be operated either in Local mode (see PAR’s. 3.2 and 3.3) using the front panel keypad,
ADJUST control and graphical display, or in Remote mode.

NOTE: Unless otherwise noted, operating instructions start from the power-up screen (see

either Figure 3-3 or Figure 3-4). Press

% to exit submenus and return to the power-up

screen.

Remote mode can either be analog or digital. Analog remote uses analog signals from the Ana­log I/O port to control the output (see PAR. 3.4). Digital remote (see PAR. 3.5) uses either the
built-in GPIB (IEEE 488) (see PAR. 3.5.4) or RS 232 (see PAR. 3.5.6) interface to communicate
with a remote computer. GPIB or RS 232 communication is via one of two protocols: 1) SCPI
commands which afford full functionality of the BOP (see PAR. 3.6, Appendix A and Appendix
B) or 2) CIIL commands (for compatibility with older Kepco products). Operation in remote mode
can be simplified by the use of the VISA driver (see PAR. 3.5.5).

3.2 POWER SUPPLY BASICS

The following paragraphs describe basic operation of the front panel controls, which are used to
configure and operate the power supply. This includes a description of the keypad (PAR. 3.2.1),

TABLE 3-1. FRONT PANEL CONTROLS AND INDICATORS

NUMBER

(FIGURE 3-1)

CONTROL/INDICATOR FUNCTION

1

POWER ON/OFF

circuit breaker A7CB1

Applies source power to unit

2

Alphanumeric/graphic Display

(LCD)

Displays output voltage and current as well as information in response to
keypad and ADJUST control entries. Displays function of soft function
keys F1 through F5, and displays information as required to perform all
local functions.

3

STANDBY indicator

Lights to indicate when the unit is in Standby mode. Behavior of the unit
in Standby (Output off) is determined by the options chosen for Load
Type (see PAR. 3.3.6). If the Load Type is ACTIVE (default), then in
Standby mode the unit is set to voltage mode, voltage is set to zero, cur­rent protection is set to the nominal, and voltage limit is set to maximum.

4

Keypad

Access all local functions (see PAR. 3.2.1, Figure 3-2 and Table 3-2 for
details).

5

FAULT indicator

Lights when a fault is detected. The failure of the following assemblies
cause the FAULT indicator to go on: A1 (any control function failure), A2
(overtemperature, instant internal overcurrent, output overvoltage/over­current, local +15V failure), A4 (input under/overvoltage, input overcur­rent, internal output under/overvoltage, internal output overcurrent,
overtemperature, fan failure, local –15V failure). When the FAULT indica­tor lights, the LCD will briefly display messages about the fault (see Table
B-5, Appendix B for details), however the FAULT indicator remains lit.
When the fault has been removed, normal operation is restored by
cycling power off, then on (preferred) or by briefly pressing the RESET
key on the front panel to initiate a shut down and power up sequence

TABLE 3-2. SPECIAL KEY FUNCTIONS

KEY FUNCTION

STANDBY

The STANDBY key toggles the unit between output on (enabled, STANDBY indicator off) and output off
(disabled, STANDBY indicator on). When on, the output goes to the programmed settings. Behavior of the
unit in Standby (Output off) is determined by the options chosen for Load Type (see PAR. 3.3.6). The
default Load Type is ACTIVE, i.e., in STANDBY the unit is set to voltage mode, voltage is set to zero, cur­rent protection is set to the nominal, and voltage limit is set to maximum.

MODE

Depressing this key shifts the operating mode from voltage to current and vice versa, and at the same time
sets the unit to STANDBY permitting the user to introduce new settings for the selected operating mode.
The operating mode is indicated at the upper right of the LCD. Setting the unit to STANDBY when the
mode is changed only occurs when using the MODE key.

R or T

From the power-up screen, these keys scroll the cursor from digit to digit within a field.

Y or U

From the power-up screen, these keys scroll through the main or protection fields. Also used to scroll
though and select options on other menus.

CLEAR

Clears numeric value to 0 (zero). Clears alphanumeric characters for new entry.

+/–

Switches the sign between + and – when inputting numerical values. The sign change applies only to the
main channel: voltage in voltage mode, current in current mode.

CAUTION:Pressing +/– key while the power is applied to the load will reverse the polarity of voltage
applied to the load.

ENTER

Activates highlighted parameters. When setting voltage/current values using the keypad, the values
entered are not programmed until ENTER is pressed.

FIGURE 3-3. POWER-UP SCREEN SHOWING GRAPHIC METERS

VOLTAGE

0000

0.

When in Sink mode, the power supply is operating as an electronic load, absorbing and recu­perating the energy of an active load. Recuperated energy is passed back into the a-c source
power line. Mode displayed at the upper right is VOLTAGE SINK when the unit is in voltage
mode and an external constant current is injected into the BOP. Correspondingly, CURRENT
SINK is displayed when the unit is in current mode and an injected current from an external con­stant voltage is presented at the output of the BOP. These messages are normally displayed
briefly when voltage is decreased towards zero, and may also be displayed briefly during
changes in a capacitive load.

The bottom lines of the display provide STATUS, ACTIVE SETTINGS and MESSAGES (includ­ing error messages).

STATUS includes whether the unit is under local or remote control, and identifies the main and
protect channels.The protect channel will show either a single entry for both positive and nega­tive VPROTECT or CPROTECT or separate entries for + and – VPROTECT or CPROTECT.
This is established by selecting either Bipolar or Independent for Protect Entry (see PAR,

3.3.3.1).

ACTIVE SETTINGS show the values that will be applied to the respective channel. The high­lighted settings are used to program the unit and can be changed using the keypad or ADJUST
control after highlighting. If these are changed using the keypad, the ENTER key must be
pressed to program the unit; if the ADJUST control is used, the changed setting immediately
programs the unit without pressing ENTER. If the main channel indicates CURR-EXT or VOLT­EXT, the setting establishes the full scale output corresponding to a 10V analog signal (see

If the display is not viewable, press # twice. The display will cycle through the range of con­trast settings. Press

# again to lock in the preferred contrast.

To select between the meter (Figure 3-3) and time line (Figure 3-4) displays refer to PAR.

3.2.5.4. To change the default power-up settings, refer to PAR. 3.3.7.

3.2.4 HOW TO ACCESS THE MENUS

From the power-up screen, pressing the Function keys indicated on the LCD opens the associ­ated menu. The menu opened may list submenus that may be opened either directly by press­ing the associated Function keys, or by highlighting an item on the list and pressing the
View/Modify function key. Menus and submenus will display a list of parameters, with the top
one highlighted. The function key assignments can vary, but generally offer the following
choices:

•

! allows the highlighted parameter to be viewed or modified. After changing the

parameter, the following choices are available.

•

$ - SAVE or ENTER to save the change

•

% - EXIT to abort the change and exit to the previous menu.

•

@ - RESTORE DEFAULT restores factory defaults for the parameters displayed

(except for GPIB address). The factory defaults may be saved as power-up defaults by

• $ - Analog Remote Setup

• • Analog Remote Settings (Table 3-15): Reference input (internal/external/external reference level), protec­tion limit (internal/external/lesser limit), external mode (enable/disable)

•

% - General Setup (Figure 3-6)

• • Interface Settings (Table 3-16): Data format (SCPI/CIIL), GPIB address (default = 6), *RST sets Output
(on/off), Device clear (SCPI/MATE), Serial Baud (Off/9600/19200), Xon/Xoff (enable/disable), prompt
(enable/disable)

• • Max/Min Settings (Table 3-5): Protect Entry (Bipolar/Independent); for voltage mode: +Voltage max, –Volt­age min, ±CProtect max/min; for current mode: +Current max, –Current min, ±VProtect max/min

• • Load Type (Figure 3-6): Active/Resistive/Battery

• • Revisions/Test (Table 3-14): (Tests: display, keypad, interface, serial, analog and output)

• • Calibration (PAR. 4.4): Voltage, Current and External and Controls calibration

• • Power-up Settings (PAR. 3.3.7): Mode (Volta ge/Current), Main channel reference (Internal/External/Exter-
nal Reference Level), protect channel type (Internal/External/Lesser Limit), Voltage Protect Limit (current
mode, Current Protect Limit (voltage mode) output on/off

• • Password (See Figure 3-5 for default settings)

• • • Password Settings: Menu protection (Interface/Max-Min/Load/Test/Power-up/Keypad @ local/Key-

pad@power-up), Save Display chg (Enable/Disable), Passwords (Main/Admin1/Admin2 or Unpro­tected)

• • Series/Parallel (Table 2-12): Configuration (Standalone/Parallel/Series/Master 2X2/Master 3X2); for parallel
or series: Unit Type (Standalone/Master+1 to+4/Slave #1 to #5) and Connection Type: shows Series or Par­allel).

3.2.4.2 HOW TO MODIFY A PARAMETER

First access the parameter by accessing the proper menu as described above (PAR 3.2.4);
Tables 3-3 through 3-15 list the menu parameters. To modify a parameter listed in a menu or
submenu, proceed as follows:

reconfiguration of the BOP, yet allow access to qualified personnel. These password levels
apply only to local operation. When in remote, only the main password is accessible, acting

as a general password (see PAR B.137). The functions that can be password protected are
Interface settings, Max/Min settings, Load type, Test, Calibration, Power-up Settings, and Key­pad lockout at power-up. In addition, it is possible to prevent changes made to the display set­tings from being saved for power up by setting Save Display Chg to Disable (default).

When the unit is operating in remote mode with Keypad @ local activated, a password is
required before the unit can be returned to local operation. In addition, when a waveform is exe­cuting in local mode, depressing

% to stop the waveform requires a password before the

waveform is stopped.

To change any password you must enter the Admin 2 password to access the Password Menu.
The unit is shipped with the Admin 2 password set to “KEPCO,” the Main Unit password set to
”DEFAULT,” and the Admin 1 password set to “A.“ To change the password or to protect one of
the protected menus, proceed as follows:

1. Press

% from the power-up screen to enter the General Setup menu. Highlight Password

and press

!.

2. Enter the Admin 2 password (see PAR. 3.2.4.4 for details), then press

! to verify. The

Password Protection menu (see Figure 3-5) is now displayed.

3. To change a password, highlight the Main Unit, Admin 1 or Admin 2 password and press

!

1. Enter the first character of the password using the keypad or ADJUST control (see PAR.

3.2.4.2 for entry of alphanumeric characters). (To change the password, refer to PAR.

3.2.4.3.)

2. Press

T to move to the next character and repeat step 1 for the next character of the pass-

word.

3. Repeat steps 1 and 2 until the correct password is displayed, then press

! to verify. The

protected setting or menu will now be accessible

NOTE: If

! the password is incorrect, the message Password incorrect is displayed at

the bottom of the screen. Press CLEAR and proceed to step 1 above.

To change the background, press # from the power-up screen, Highlight Background, press

!, highlight Black or White, then $ to save. Press $ exit and save for power-up or % to

apply the changes (without saving for power-up) and exit.

TABLE 3-3. DISPLAY (OPERATOR CONVENIENCE) MENU FUNCTIONS

SETTING

CHOICES

(BOLD = Factory Default)

FUNCTION

NOTE: To save any of the functions listed below for power-up it is necessary to first change SAVE DISPLAY CHG at the password

setup (see PAR. 3.2.4.3and Figure 3-5) from DISABLE to ENABLE.

GRAPHIC DISPLAY Meters

75s Graph
30s Graph
15s Graph

7.5s Graph

3.8s Graph

1.5s Graph

0.8s Graph

0.5s Graph

0.3s Graph

0.15s Graph

0.04s Graph

0.08s Graph

METERS - Output voltage and current are displayed on representations of ana­log meters.
GRAPH - Displays a sample of the output for the time indicated (see Figure 3-

4). The complete time-line uses 240 points. E.g., selecting 2 Second Graph
means that 2S/240 = 50ms sampling, i.e., every 50ms a snapshot of the output
state is used to produce a single point.

DISPLAY
BACKGROUND

White

Black

WHITE - Sets the background to white and displays black characters.
BLACK - Sets the background to black and displays white characters.

3.2.5.4 DISPLAYING METERS OR GRAPH (TIME LINE)

The top screen can be configured to either display graphical analog meters (Figure 3-3) show­ing a coarse representation of voltage and current in addition to the digital readout, or a graphi­cal time line (Figure 3-4). The graphical time line is not an oscilloscope type display. Instead, it
samples the output and refreshes the screen at a specified interval: 75, 30, 15, 7.5, 3.8, 1.5, 0.8,

0.3, 0.15, 0.08 or 0.04 seconds. This can be useful when executing a waveform, although it is
not a substitute for monitoring the output with an oscilloscope for precision. There is no correla­tion between voltage and current graphs. For the best graphical representation choose the
graph time that is closest to, but greater than, the waveform time duration.

From the power-up screen, press

#, then highlight the Graphic Display setting and press !.

Highlight any of the meters or one of the graph selections and press

$ to save. Then press $

to save for power-up or % to exit.

3.3 LOCAL MODE OPERATION

Local operation of the BOP power supply can be accomplished from the front panel via the 27
key keypad, and the ADJUST knob. All indications are provided by the 4-inch graphical display
(LCD).

3.3.1 SETTING LOCAL MODE

When the power supply is turned on, it is automatically set to Local mode. If the unit is in
REMOTE mode and the display shows F1-LOCAL, pressing

! sets the unit to LOCAL mode.

3.3.3 PROGRAMMING VOLTAGE OR CURRENT AND ASSOCIATED PROTECT LIMITS

From the power-up screen the settable voltage/current parameters are displayed at the bottom
of the LCD above the HELP message (see Figure 3-3). Use

Y or U to highlight the main or

protect channel. (For BOP protect limits refer to PAR. 3.3.4.2 and for external limits see PAR.

3.3.4.3.)

1. To verify that the unit is configured for internal references press

$ from the power-up

screen and verify that Reference Input and Protection Limit are set to Internal, and External
Mode is set to Disable. If necessary to change a setting, use

Y or U to highlight the

parameter, and press

! to modify. Highlight the desired selection and press $ to save,

then press

$ to save for power-up or % to exit. If analog programming is desired, refer to

PAR. 3.4.

2. Verify that the load has been configured properly to ensure that the unit behaves as
expected when the output is off (see PAR. 3.3.6 for details).

3. Press MODE key to select the main channel (VOLTAGE or CURRENT); the associated
PROTECT channel is automatically selected and displayed.

4. Set the output on or off as desired using the STANDBY key. The output is off (disabled)
when the STANDBY indicator is lit, on (enabled) when not lit.

5. Use

Y or U to highlight the main channel. There are two ways to program the output in

3.3.3.1 SELECTING BIPOLAR/INDEPENDENT PROTECTION LIMITS

The BOP can be configured to show the protection limits as either a single value that applies to
both protection channels or show individual settings for positive and negative protection limits.
Selecting Independent protection limits means that the positive and negative limits are dis­played (and can be modified) independently. Bipolar means that for each protection limit (volt­age or current) a single value applies to both the positive and negative limits; only one value is
displayed and can be edited for both ± protection limits.

TABLE 3-4. VOLTAGE AND CURRENT PARAMETER DEFINITIONS

Term Definition

To m o dify

refer to PAR.

Local Remote

+E

Onom

–E

Onom

The nominal (rated) output voltage of the unit determined by model; e.g. for
a BOP 36-28MG, ±E

Onom

is 36V.

N/A N/A

+I

Onom

–I

Onom

The nominal (rated) output current of the unit determined by model; e.g. for
a BOP 36-28MG, ±I

Onom

is 28A.

N/A N/A

+Voltage
–Voltage

Voltage mode only. Positive (+) and negative (–) output voltage values
established by keypad or remote command.
Range (+): 0 to +Voltage max

3.3.3 B.84

Press % from the power-up screen to enter the General Setup menu (Figure 3-6), then high­light Max/Min Settings. Press

! to enter the Max/Min Settings submenu (Figure 3-7). (If a

Password is required, see PAR. 3.2.4.4 for instructions.) Highlight Protect Entry and press

! to

change it. Highlight Bipolar or Independent, then

$ to save, or % to abort. When complete,

Minimum (box)
+Voltage Protect Min
–Voltage Protect Max

Current mode only. Minimum (positive) setting for +Voltage Protect and
maximum (maximum negative) setting for –Voltage Protect. Values of ±Volt­age Protect between +Voltage Protect Min and –Voltage Protect Max (near
zero) are not allowed. This zone (also referred to as the minimum (box) is
automatically calculated by the BOP (see Figure 1-3).

N/A N/A

+Current
–Current

Current mode only. Positive and negative output current established by
keypad or remote command.
Range (+): 0 to +Current max
Range (–): 0 to –Current min

3.3.3 B.17

+Current max
–Current min

Current mode only. Maximum (positive) and minimum (maximum
negative) current that can be set.
Value (+): 0 to +I

Onom

Value (–): 0 to –I

Onom

3.3.4.1 B.19, B.20,
B.23, B.21

TABLE 3-4. VOLTAGE AND CURRENT PARAMETER DEFINITIONS (CONTINUED)

Term Definition

To m o dify

refer to PAR.

Local Remote

FIGURE 3-7. MAX/MIN SETTINGS MENU

Selection of Bipolar does not immediately change the protect limit values; it changes how the
protect settings are displayed and set from the power-up screen. So if maximum/minimum pro-
tection limits were set to different values, (e.g, for BOP 36-28MG, current mode, no load, +V

3.3.4 CHANGING MAXIMUM OR MINIMUM SOFTWARE-CONTROLLED LIMITS

The maximum or minimum allowable voltage and current settings of the unit can be reduced
from the nominal using the Max/Min Settings menu. which lists the system’s software-controlled
voltage and current limits (+Voltage Max, –Voltage Min, +Current Max, –Current Min) as well as
the corresponding protection limits organized by operating mode. The default values of the sys­tem limits are established by the Model: the nominal (rated) values for voltage and current and

1.01 x the nominal (rated) values for protection. The default values can be reduced by modifying
the highlighted parameter. The unit will not accept local or remote commands that exceed the
system limits. The system limits are always in effect, even when the unit is controlled by an
external reference. If system limits are changed, the protection limits must be changed to
correspond to the new system limits. As an example, changing +Voltage Max and –Voltage
Min of a BOP 36-28MG to ±3V, respectively, causes the unit to behave as if it was a BOP 3­28MG. In this case it is important to change the +V Protect Max and –V Protect Min limits (e.g.,
to ±3.3V, respectively) so that the load is protected when operating in Current Mode. System
limits are absolute values (do not use minus sign for negative limits).

The internal parameters +Current Protect Min and –Current Protect Max are displayed to com­pletely define the permissible window when operating in Voltage mode. Similarly, +Voltage Pro­tect Min, and –Voltage Protect Max are displayed to completely define the permissible window
for voltage when operating in Current mode.

3.3.4.1 CHANGING MAXIMUM ACCEPTED VOLTAGE OR CURRENT (MAIN CHANNEL SOFT­WARE LIMITS)

The software limits for the main channels (+Voltage Max, –Voltage Min, +Current Max and –
Current Min) are the maximum (positive) and minimum (Maximum negative) values allowable
for voltage and current. The default software limits are determined by the model: the nominal
(rated) values for voltage and current (e.g., 36V and 28A for the BOP 36-28MG). These four
values can be adjusted independently. For example, a BOP 36-28MG, capable of delivering
±36V in voltage mode can be configured to allow voltage to be adjusted only from –1V to

+V Protect Max (value)

Eomax +1% of Eomax

Defines the maximum value that +Voltage Protect can be set to. To modify refer
to 3.3.4.1.

+V Protect Min (internal value)

Not Adjustable

Defines the minimum value that +Voltage Protect can be set to. This is a calcu­lated value and is not adjustable from the front panel.

–V Protect Max (internal value)

Not Adjustable

Defines the maximum (minimum negative) value that –Voltage Protect can be
set to. This is a calculated value and is not adjustable from the front panel.

–V Protect Min (value)

Eomax + 1% of Eomax

Defines the minimum (maximum negative) value for –Voltage Protect. To modify
refer to 3.3.4.1.

NOTE: To restore all Max/Min settings defaults, press

% from the power-up screen, highlight Max/Min settings, press !, then

press

@ to restore defaults shown above in BOLD. Press $ to save for power-up or % to apply the changes (without

saving for power-up) and exit.

TABLE 3-5. MAX/MIN SETTINGS MENU (CONTINUED)

SETTING

CHOICES

(BOLD = Factory Default)

FUNCTION

3. Highlight the voltage or current max/min value and press ! to change it. Software limits

are absolute values (do not use minus sign for negative limits). Use number keys to change
the setting, then

$ to save.

4. When complete, press

$ to save for power-up, # to abort, or % to apply the changes

(without saving for power-up) and exit.

5. Upon return to the power-up screen, the main channel (voltage or current) is compared
against the main channel limits in effect. If the main channel exceeds the limit, it is set to
zero.

3.3.4.2 CHANGING MAXIMUM/MINIMUM PROTECTION SOFTWARE-CONTROLLED LIMITS

The ± protection limits are software limits that establish the maximum and minimum (maximum
negative) allowable levels of output voltage in current mode and current in voltage mode. The
default protection limits are 1% above E

Omax or

1% above I

Omax

.

The protect channel limits are +V (voltage) Protect max, –V Protect min, +C (current) Protect
Max and –C Protect min (see Table 3-4); these prevent the unit from delivering voltage or cur­rent that exceed these settings. In voltage mode the current protect channel is clamped to the
limit value; in current mode the voltage protect channel is clamped to the limit value. Adjustment
range is between a minimum (box) value (see Figure 1-3) and 1% above the nominal (rated)
value.

CAUTION: WHEN WORKING WITH ACTIVE LOADS, ALWAYS ADJUST THE BOP PRO-

3.3.5 ENABLING/DISABLING DC OUTPUT POWER

The BOP output can be disabled (OFF) or enabled (ON) by toggling the STANDBY key in local
mode or sending the SCPI OUTPut ON or OUTPut OFF command (see PAR. B.13) via the
selected digital remote control bus (see PAR. 3.5). The behavior of the unit when disabled
depends on the Load Type setting (see PAR. 3.3.6 and Table 3-6 for details).

3.3.6 DETERMINING HOW THE UNIT RESPONDS WHEN OUTPUT IS OFF (LOAD TYPE)

The BOP supports three Load Type selections (see Table 3-6) which determine how the power
supply responds when the output is off: ACTIVE, RESISTIVE and BATTERY. (Load type CUS­TOM (not normally active) permits customized settings to be implemented; for details contact
consult factory.) These selections are designed to provide proper operation with different load
types. It is important to note that the Load Type selection does not affect the settings of the
power supply for ON state; it only affects the main internal reference level and the protection lev­els during the OFF state.

For inductive loads, and especially superconducting magnet type
loads, the inherent offset of the BOP in the OFF state may generate sig-

WARNING

Accessing the BOP after the output is disabled in BATTERY mode is
hazardous because (1) high current arcing is possible and (2) either the
external battery voltage, or the voltage (±Voltage Protection max) on the
BOP output terminals may be dangerous. Therefore, for battery and
constant-voltage-type active electronic loads it is recommended that
two properly rated external switches be installed for safety: one in
series with the battery, and one across the BOP output. After the unit is
set to OFF, first open the switch in series with the battery, then close
the switch across the BOP output to ensure safety before handling
BOP connections. When connecting the battery, the switch across the
output should be opened after the connections are complete and then
the switch in series with the battery should be closed. If the constant­voltage-type active electronic load is adjusted to zero before handling
the power supply-to-load connections, only the switch across the BOP
output is required.

BATTERY. This mode is necessary for the power supply to function properly and safely with

either battery or constant-voltage-type active electronic loads. This mode prevents the battery
from discharging during the OFF state. When the output is disabled (set to OFF), the BOP will
go to current mode, current will be set to zero, with voltage protect and current limit set to maxi-

WARNING

3.3.7 CHANGING THE DEFAULT POWER UP SETTINGS

When the BOP is shipped, the following default settings are programmed to be in effect each
time the unit is turned on, however these defaults may be changed as indicated below;

• Mode: Voltage (may be voltage or current, see PARs. 3.3.2 and 3.4.2. Table 3-7 illus­trates the relationship between Mode, Main Channel, Protection Type and Levels set­tings.

• Main Channel: Internal (may be Internal, External, or External Reference Level, PARs.

3.3.3 and 3.4.3).

• Protection type: Internal (may be Internal, External, Lesser Limit) (see PARs. 3.3.3 and

3.4.4)

• Levels, Voltage and Current: maximum (see PAR. 3.4.4) Represents the power-up val­ues for protection limit channels (bipolar limits), voltage for current mode and current for
voltage mode. Table 3-7 illustrates the relationship between Mode, Main Channel, Pro­tection Type and Levels settings.

• Output: on (may be on or off) (see PAR. 3.3.5)

To change the default settings refer to the applicable paragraph(s) specified above as needed,
then from the power-up screen press

%. Highlight Power-up Settings and press !. (If a Pass-

word is required, see PAR. 3.2.4.4 for instructions.) Highlight the parameter and press

! to

modify. Use

Y, U or the ADJUST control to highlight a selection, then press $ to save. To

change a value use the number keys to enter new setting, then

$ to save. When all power-up

settings have been configured, press

$ to save for power up or % to exit and abort the

3.3.8 STORING/RECALLING POWER SUPPLY OUTPUT SETTINGS

The power supply settings (mode, main channel reference type and setting, protection limit type
and setting and output status) can be stored in one of 99 memory locations for later recall. This
feature is accessible from the front panel by pressing

! from the power-up screen to view the

Saved Settings screen (Figure 3-8). For a description of abbreviations used, refer to PAR.

3.3.8.1 To view previously saved settings refer to PAR 3.3.8.2. To save the power supply set­tings or modify previously saved settings refer to PAR. 3.3.8.3. To recall saved settings and
apply them to the output refer to PAR. 3.3.8.5.

3.3.8.1 UNDERSTANDING ABBREVIATIONS USED FOR SAVED SETTINGS

Voltage Internal

External

or Lesser

Limit

Voltage: 10
Current: 25

Unit powers up in voltage mode, 0V, ±current protection determined by pins 5
and 13 (see PAR. 3.4.4 for External, PAR. 3.4.4.1 for Lesser Limit). Pressing
MODE changes mode to current, puts unit in standby. When output is on,
(STANDBY indicator off), ±voltage protection determined by, pins 6 and 14.

Current Internal

External

or Lesser

Limit

Voltage: 10
Current: 25

Unit powers up in Current mode, 0A, ±voltage protection determined by pins
6 and 14 (see PAR. 3.4.4 for External, PAR. 3.4.4.1 for Lesser Limit). Press­ing MODE changes mode to voltage, puts unit in standby. When output is on,
(STANDBY indicator off), output voltage is 0V, ±current protection determined
by, pins 5 and 13.

TABLE 3-7. EXAMPLES SHOWING HOW POWER-UP SETTINGS FUNCTION (CONTINUED)

Mode

Main

Channel

Protection

Typ e

Levels

Power-up condition (output ON)

(All referenced pins located on Analog I/O Port

see PAR. 3.4 and Figure 2-1)

If Protection type was saved as External, EXT is listed under the Prot heading. In this case the
protection settings are determined by the levels applied to the appropriate pins of the Analog I/O
Input Port (see Table 2-10). If the main channel is voltage, the protection settings are deter­mined by pin 5 (negative current protection) and pin 13 (positive current protection). If the main
channel is current, the protection settings are determined by pin 6 (negative voltage protection)
and pin 14 (positive voltage protection).

TABLE 3-8. SAVE/RECALL MENU

PARAMETER

CHOICES

(BOLD = Factory Default)

FUNCTION

NOTE: DEFAULT values for empty cells are the settings of the unit at the time the save/recall menu is entered.

MODE VOLT

CURRENT

EXTERNAL

VOLT - Selects voltage mode. Voltage value determined by SETTING.
CURRENT - Selects current mode. Current value determined by SETTING.
EXTERNAL - Used for customized configuration where EXT VM/CM signal at pin
2 of I/O port controls mode; consult factory for details.

MAIN CHANNEL

REFERENCE

INTERNAL

EXTERNAL

EXTL REF LVL

INTERNAL: Any external reference applied to the Analog I/O port pin 11 is ignored
and the internal reference established by SETTING field.
EXTERNAL: The internal reference is ignored, and the external reference applied
to the Analog I/O port pin 11 is used (see PAR. 3.4.3.1).
EXTL REF LVL: Allows the gain of the BOP to be established by the maximum
output voltage or current introduced by the SETTING field. (see PAR. 3.4.3.2).

SETTING nn.nnn or

nnn.nnn

(model and parameter

dependent)

Sets the active channel setting. E.g., if VOLT mode is selected, nnn.nnn is voltage
setting, if CURRENT mode is selected, nn.nnn is current setting. If EXTERNAL
mode is selected, SETTING is not available.

PROTECTION

MODE

INTERNAL

EXTERNAL

LESSER LIMIT

INTERNAL - Allows limits to be controlled by POSITIVE and NEGATIVE values.
EXTERNAL: Allows limits to be controlled by analog signals applied to the analog
port (see PAR. 3.4.4).
LESSER LIMIT: Allows protect limit to be automatically selected from either 1) the
external analog voltage applied to the Analog I/O port or 2) the value set in the
POSITIVE and NEGATIVE fields. Whichever limit has a lower absolute value

3.3.8.4 COPYING PREVIOUSLY SAVED SETTINGS TO A NEW LOCATION

1. Press

! from the power-up screen to enter the Saved Setups screen (Figure 3-8).

2. Use the

U and Y keys to highlight the location to be copied, then press $.

3. Highlight an Empty location and press

$ to save to the highlighted location, or press % to

abort the copy.

3.3.8.5 APPLYING SAVED SETTINGS TO THE OUTPUT (RECALL)

1. Press

! from the power-up screen to enter the Save/Recall menu.

2. Use the

U and Y keys to highlight the desired memory location. When the desired location

is highlighted, press

! to view the detailed settings before execution, or press @ to apply

the settings to the output. Refer to PAR. 3.3.8.3 to modify a setting before execution.

3.3.9 WAVEFORM GENERATION

3.3.9.1 PROTECTING THE LOAD WHEN ACCESSING WAVEFORMS

CAUTION: BEFORE PRESSING

@ TO ENTER THE SAVED WAVEFORM SCREEN FROM

THE POWER-UP SCREEN, PERFORM THE FOLLOWING STEPS TO AVOID
UNEXPECTED VOLTAGES OR CURRENTS FROM PREVIOUS SETTINGS
BEING BRIEFLY APPLIED TO THE LOAD WHEN THE WAVEFORM IS FIRST

FIGURE 3-9. SAVED WAVEFORMS MENU

3.3.9.3 UNDERSTANDING HOW WAVEFORMS ARE GENERATED

Waveform are generated by the BOP by producing a series of discrete output levels (points) in a

TABLE 3-9. SINE, TRIANGLE AND RAMP WAVEFORM FREQUENCY VS. POINTS

Frequency

(See Notes 1, 2, and 3)

Total Points

Frequency

(See Notes 1, 2, and 3)

Total Points

From To From To

0.01Hz 2.7Hz 3840 55.5Hz 66.5Hz 160

2.71Hz 3.6Hz 2880 66.6Hz 88.7Hz 120

3.71Hz 5.5Hz 1920 88.8Hz 118.3Hz 90

5.6Hz 8.3Hz 1280 118.4Hz 147.9Hz 72

8.4Hz 11.0Hz 960 148Hz 177.4Hz 60

11.1Hz 14.7Hz 720 177.5Hz 221.8Hz 48

14.8Hz 22.1Hz 480 221.9Hz 295.8Hz 36

22.2Hz 33.2Hz 320 295.81Hz 354.9Hz 30

33.3Hz 44.3Hz 240 355.9Hz 443.7Hz 24 (See Note 2)

44.4Hz 55.4Hz 192 443.8z 532Hz 20 (See Note 3)

NOTES: 1. As the frequency varies within the range, the time interval per point varies proportionately.

2. Sine and Triangle segments can not exceed 443Hz.

3. Ramp segments can not exceed 532Hz.

whether the segment is initial (run only the first time) or repeating is indicated by I or R, respec­tively. To see the offset, start/stop angle, initial/repeat for a segment, use

Y or U or the

encoder to highlight the segment, then press

! (Initial/Repeat is not available for the last seg-

ment, since the last segment must repeat). Use use

Y or U to highlight the parameter, press

!, then set the value or highlight the desired setting and press $ to save for power-up or %

to abort and exit without changing the parameter.

mode can not be edited; to change from a voltage waveform to a current waveform, refer to
PAR. 3.3.9.8 to start a new waveform.)

Use

Y or U or ADJUST to highlight the segment, then press ! to edit,

When editing a segment, a submenu showing the parameters for that segment will open (see
Table 3-11). Use

Y or U or the encoder to highlight the parameter, then press ! to edit,

change the parameter, then press

$ to save or % to abort. Then press $ to save for power

p or

% to abort and exit without saving the segment parameters that were edited.

TABLE 3-11. WAVEFORM SEGMENT DETAILS MENU

SETTING CHOICES FUNCTION

Type Square

Pos Ramp

Neg Ram

Triangle

Sine

Level

Square - Square wave, bipolar, starts with positive excursion (see Note 1).
Pos Ramp - Increasing ramp, bipolar (see Note 1).
Neg Ramp - Decreasing ramp, bipolar (see Note 1).
Triangle - bipolar, starts with positive excursion, start/stop angle may be user controlled
(see Note 1).
Sine - - bipolar, starts with positive excursion, start/stop angle may be user controlled
(see Note 1).
Level - value determined by offset., duration determined by Period.

Frequency (Hz) or
Period (Sec) for Level
only

xxxx.xxx (Hz) or

xx.xxxx (Seconds)

(see Note 3)

Square wave: 0.02 to 1000 Hz
Ramp: 0.02 to 532 Hz
Sine or Triangle:0.01 to 443 Hz
Level: Period in seconds. 0.005 to 5.0000 seconds

Amplitude (P to P) xxx.xxx

(Volts or Amperes)

Peak to peak amplitude of segment. Volts or Amperes determined by mode selected
for waveform. Value within model rating acceptable (e.g., for BOP 100-10MG, maxi-

To delete a segment, highlight the segment at the Waveform Settings screen (Figure 3-10), the
press

#, to permanently erase the segment. This change is saved immediately and can not be

undone.

To add a segment, at the Waveform Settings screen (Figure 3-10) highlight the segment follow­ing the one to be added (e.g., if there are three existing segments (1, 2, 3), to add a segment
between 2 and 3, highlight 3. To add a segment following 3, highlight End of Segments. After
highlighting the segment, press

@ to insert a new segment. The parameters applicable to the

waveform type selected (see Table 3-11 for details) can then be modified as desired.

3.3.9.8 CREATING A NEW WAVEFORM

1. After observing the precautions of PAR. 3.3.9.1, press

@ from the power-up screen to enter

the Saved Waveforms screen (Figure 3-9), highlight one of the waveforms designated
Empty, then press

@. The Waveform Settings screen (Figure 3-10) opens.

2. Assign a name to the waveform: highlight Name, press

! to modify, change the name

using the

Y or U keys or ADJUST or the multiple presses of the numeric keys (see PAR.

3.2.4.2 for details). Press

$ to save or % to abort.the change and exit.

TABLE 3-12. NEW WAVEFORM SETTINGS MENU

SETTING CHOICES FUNCTION

Name Alphanumeric characters

(10 characters max.)

Waveforms are assigned a number from 1 to 16. When a new waveform is
programmed, a name must be assigned so it can be easily recognized and

6. When adding a new segment, the parameters of the highlighted segment are copied. It is
not possible to move or copy a segment to another location. Refer to Table 3-11, Note 2 for
details about initial vs. repeating segments. Refer to PAR. 3.3.9.9 for a detailed example of
how to add segments to build a complex waveform.

3.3.9.9 USING SEGMENTS TO BUILD A WAVEFORM

The following steps provide detailed instructions to illustrate how a complex waveform, illus­trated in Figure 3-11, may be created by building segments. Refer to PAR. 3.2.4 for details on
changing parameters if needed.

3. From the Waveform Settings screen, highlight segment NEG RAMP 50.0HZ 4.00 R and
press

@ to insert a new segment. Use ! to modify the following settings of the new seg-

ment. For each parameter, use

$ to save the setting.

Type Level
Period (sec) 0.002
Offset 0
Initial/Repeat Initial

When complete, press

$ to save for power-up. This step changes the 2ms, 0V level to be

executed only once at the beginning of the waveform.

4. From the Waveform Settings screen, highlight segment LEVEL 0.002s 0.00 I and press

@

to insert a new segment. Use ! to modify the following settings of the new segment. For
each parameter, use

$ to save the setting.

Type Level
Period (sec) 0.001
Offset 1.5

When all settings are complete, press

$ to save for power-up. This step creates a 1.5V

level of 1ms prior to the 0V level. This segment is automatically set to Initial since the previ­ous segment is set to Initial. The first two segments form a positive 2ms, pulse, delayed 1ms
from the start of execution. The pulse can be used for synchronizing an external monitoring

When all settings are complete, press

$ to save for power-up. This step create a repeating

1/4 sine wave that starts at 6V and rises to 10V over 5 ms (1/4 of 20ms period established
by 50Hz frequency). The waveform shown in Figure 3-11 has now been saved. Note that by
careful calculation of period and start/stop angle, accurate waveform simulations can be
attained.

7. Either execute the completed waveform by pressing STANDBY (to turn the output on), then

$, or press % to return to the Saved Waveforms screen.

3.3.9.10 COPYING A WAVEFORM

After observing the precautions of PAR. 3.3.9.1, press

@ from the power-up screen to enter

the Saved Waveforms screen (Figure 3-9). Highlight one of the stored waveforms, then press

$. Then highlight a waveform location designated Empty and press $ to save or % to abort

the change and exit. The copied waveform may then be modified and saved with a new name if
desired (see PAR. 3.3.9.7).

3.3.10 RESET

CAUTION: PRESSING RESET WILL CAUSE VOLTAGE TRANSIENTS TO APPEAR AT

THE OUTPUT WHICH MAY DAMAGE A CONNECTED LOAD. SWITCH IS
RECESSED TO PREVENT INADVERTENT ACTIVATION.

Save Disabled, Request ignored Save Display Change is disabled. From power-up screen, press %, highlight password

settings to enable.

EXTERNAL MODE enabled. MODE key does not function while Mode is being controlled externally. Press

$, high-

light External Mode and change to Disable.

F2 Key not valid F2 only works when labeled. key was probably pressed inadvertently.

Password incorrect Enter the correct password and press

!. If password has been lost and can not be

recovered, refer to PAR. 3.6.3.12.1 to reset to factory defaults.

Setup Menu

F3 - Invalid

# only works when labeled. Key was probably press inadvertently.

F4 - Invalid

$ only works when labeled. Key was probably press inadvertently.

Master/Slave Menu

Series or Parallel when not
STANDALONE

Mismatch between Unit type and Connection type. Automatically reverts to
Unit type: Standalone, Connection Type: standalone.

Calibration invalid - Multiple Unit Consult Factory.

BITBUS option must be Disabled Change CIIL mode to SCPI. From power-up screen press

% highlight Interface Data For-

mat, press

!, highlight SCPI, press $, then press $ to save for power-up, then

cycle BOP off, then on.

Waveform Menu

External Reference Waveform not
accessible

Reference Input must be set to Internal for waveforms to be executed. Press

$ highlight

Reference Input, press

! highlight Internal, press $, then %.

TABLE 3-13. ERROR MESSAGE EXPLANATIONS (CONTINUED)

ERROR MESSAGE EXPLANATION

BOP as a power amplifier (PAR. 3.4.3) and 3) establish the protection limits (PAR. 3.4.4). An
output signal proportional to output current is also provided for external use (PAR. 3.4.5).

3.4.1 REMOTE OUTPUT OFF

There are two ways two turn off the output using remote signals: (1) Remote Shutdown which
requires the unit to be turned off, then on in order to restore operation and (2) Remote Standby
which sets the output to OFF, putting the unit in STANDBY status.

3.4.1.1 REMOTE SHUTDOWN

A standalone unit can be shut down using a remote signal applied to the PROTECTION EXT.
PORT as shown in Figure 3-12 or 3-13. A multiple unit configuration (parallel, series or series­parallel) can be disabled by applying a remote signal to the master PAR/SER PROTECTION
PORT as shown in Figure 3-12 or 3-14. When the signal is momentarily active (minimum 100
microseconds), power transfer between input and output is stopped (both input and output inter­nal modules are shut off). This condition is latched and requires the unit to be turned off, then on
again to restore normal operation.

FIGURE 3-14. REMOTE SHUTDOWN USING INTERNAL POWER, MULTIPLE UNITS,

3.4.1.2 REMOTE STANDBY

A standalone unit or a multiple unit configuration (parallel, series or series-parallel) can be set to
STANDBY status by applying a remote signal to the TRIGGER PORT as shown in Figure 3-15.
For multiple unit configurations this signal must be applied to the master. When the signal is
momentarily active (short or logic 0 for a minimum of 100 microseconds), the output is set to
OFF after a maximum delay of 200 milliseconds and the STANDBY indicator goes on. Depress­ing the STANDBY key or sending the OUTP ON command via the remote interface restores the
unit to the previous state and the STANDBY indicator goes off.