KEPCO BHK 500-0.4MG User manual

IMPORTANT NOTES:
1) This manual is valid for the following Model and associated serial numbers:
MODEL SERIAL NO. REV. NO.
2) A Change Page may be included at the end of the manual. All applicable changes and
revision number changes are documented with reference to the equipment serial num-
bers. Before using this Instruction Manual, check your equipment serial number to identify
your model. If in doubt, contact your nearest Kepco Representative, or the Kepco Docu-
mentation Office in New York, [phone], requesting the correct revision for your par-
ticular model and serial number.
3) The contents of this manual are protected by copyright. Reproduction of any part can be
made only with the specific written permission of Kepco, Inc.
Data subject to change without notice.
KEPCO®
THE POWER SUPPLIER™
MODELS
OPERATOR’S MANUAL
KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11355 U.S.A. TEL [phone] FAX [phone]
email: [e-mail] World Wide Web: http://www.kepcopower.com
KEPCO INC.
An ISO 9001 Company.
BHK-MG FULL RACK SERIES
POWER SUPPLY
VOLTAGE/CURRENT-STABILIZED DC SOURCE
BHK 300-0.6MG
BHK 500-0.4MG
BHK 1000-0.2MG
BHK 2000-0.1MG
©2016, KEPCO, INC
P/N 243-1322j

032816
228-1782 Dec of Conf BHK-MG 40W (1/2 Rack), 200W (Full Rack)
A
Declaration of Conformity
Application of Council directives:
2006/95/EC (LVD)
2004/108/EC (EMC
Standard to which Conformity is declared:
IEC61010-1, 3rd Edition Safety requirements for electrical equipment for
measurement, control, and laboratory use
(designed to meet)
EN55011 (Class A, conducted and radiated)
(radiated is designed to meet)
Limits and Methods of Measurement of Radio
Disturbance Characteristics of Information
Technology Equipment (designed to meet)
EN61000-4-11, EN61000-4-4, EN61000-4-2,
EN61000-4-5, IEC61000-4-3, IEC61000-4-6,
IEC61000-4-8
Voltage Dips, Fast Transient_EFT,
ESD, Surge Immunity, Radiated Immunity
(designed to meet), Conducted Immunity,
Magnetic Field Immunity (designed to meet)
Manufacturer's Name:
Manufacturer's Address:
KEPCO, INC.
131-38 SANFORD AVENUE
FLUSHING NY 11355
USA
Importer's Name:
Importer's Address:
Type of Equipment: Component Power Supply
Model Series
BHK-MG 40W (1/2 Rack), 200W
(Full Rack), all models, all
options
Model No.:
Year of Manufacture:
I, the undersigned, declare that the product specified above, when used in
conjunction with the conditions of conformance set forth in the product
instruction manual, complies with the requirements of the Low Voltage Directive
2006/95/EC, which forms the basis for application of the CE Mark to this
product.
Place: Kepco, Inc.
131-38 Sanford Ave.
Flushing NY 11355
USA
Date:
Mark Kupferberg
(Full Name)
Executive Vice President
(position)

B228-1351 COND/CONFORM 032816
Conditions of Conformance
When this product is used in applications governed by the requirements of the EEC, the following restric-
tions 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 incom-
plete in construction, the end product enclosure must provide for compliance to any remaining electri-
cal safety requirements and act as a fire enclosure. (EN61010-1:2001, Cl. 6, Cl. 7, Cl.8, and Cl. 9)
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. It is intended for use as part of equip-
ment 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. (EN61010-1:2001, Cl.6.10.1)
4. This power supply has secondary output circuits that are considered hazardous, and which exceed
240 VA at a potential of 2V or more.
5. The output wiring terminals of this power supply has not been evaluated for field wiring and, therefore,
must be properly configured by the end product manufacturer prior to use.
6. This power supply employs a supplementary circuit protector in the form of a circuit breaker mounted
on the front panel. This circuit breaker protects the power supply itself from damage in the event of a
fault condition. For complete circuit protection of the end product, as well as the building wiring, it is
required that a primary circuit protection device be fitted to the branch circuit wiring. (EN61010-1:2001,
Cl. 9.5)
7. Hazardous voltages are present within this power supply during normal operation. All operator adjust-
ments to the product are made via externally accessible switches, controls and signal lines as speci-
fied within the product operating instructions. There are no user or operator serviceable parts within
the product enclosure. Refer all servicing to qualified and trained Kepco service technicians.

228-1353 SAFETY - (SWITCH) 032816 C/(D BLANK)
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 prod-
uct 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.
3. Electric Shock Hazards
This product outputs hazardous voltage and energy levels as a function of normal operation. Operators
must be trained in its use and exercise caution as well as common sense during use to prevent accidental
shock.
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 set for the nominal a-c mains voltage indicated by the Voltage
Range Selector switch located adjacent to the source power connection on the prod-
uct's rear panel. To reconfigure the product input for other nominal mains voltages as
listed herein, follow the applicable instructions shown in this manual.
NOTE: Source power must be removed from the product prior to changing the set-
ting of the Voltage Range Selector switch.
The PROTECTIVE EARTHING CONDUCTOR TERMINAL must properly con-
nected prior to application of source power to the product (see instructions on instal-
lation herein) in order to ensure safety from electric shock.
PROTECTIVE EARTHING CONDUCTOR TERMINAL - This symbol indicates the
point on the product to which the protective earthing conductor must be attached.
EARTH (GROUND) TERMINAL - This symbol is used to indicate a point which is
connected to the PROTECTIVE EARTHING TERMINAL. The component installer/
assembler must ensure that this point is connected to the PROTECTIVE EARTH-
ING TERMINAL.
CHASSIS TERMINAL -This symbol indicates frame (chassis) connection, which is
supplied as a point of convenience for performance purposes (see instructions on
grounding herein). This is not to be confused with the protective earthing point, and
may not be used in place of it.
This symbol appears adjacent to any external terminals at which hazardous voltage
levels as high as 500V d-c may exist in the course of normal or single fault condi-
tions.
This symbol appears adjacent to any external terminals at which hazardous voltage
levels in excess of 500V d-c may exist in the course of normal or single fault condi-
tions
!
!
!
!
!

BHK 500-0.4MG SVC 020498 i
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 Features.................................................................................................................................................. 1-8
1.4.1 Local Control...................................................................................................................................... 1-8
1.4.2 Remote Control.................................................................................................................................. 1-8
1.4.2.1 Digital Programming .................................................................................................................... 1-8
1.4.2.2 Analog Programming................................................................................................................... 1-8
1.4.2.3 Analog Readback......................................................................................................................... 1-8
1.4.3 Digital Calibration............................................................................................................................... 1-8
1.4.4 Overvoltage/Overcurrent Protection.................................................................................................. 1-9
1.4.5 User-defined Voltage/Current Limits.................................................................................................. 1-9
1.4.6 Nonvolatile Storage of Programmed Sequences or Active Settings.................................................. 1-10
1.4.7 Current Scale..................................................................................................................................... 1-10
1.4.8 Fast Mode/Slow Mode Selection....................................................................................................... 1-10
1.4.9 External Trigger Port.......................................................................................................................... 1-10
1.4.10 Built-in Protection............................................................................................................................... 1-11
1.4.11 Current Sink Capability...................................................................................................................... 1-12
1.4.12 Analog Readback and Flag Signals Available for Customer Use...................................................... 1-12
1.5 Equipment Supplied................................................................................................................................ 1-13
1.6 Accessories............................................................................................................................................. 1-14
1.7 Safety...................................................................................................................................................... 1-14
SECTION 2 - INSTALLATION
2.1 Unpacking and Inspection....................................................................................................................... 2-1
2.2 Terminations and Controls ...................................................................................................................... 2-1
2.3 Source Power Requirements .................................................................................................................. 2-6
2.4 Cooling .................................................................................................................................................... 2-6
2.5 Preliminary Operational Check................................................................................................................ 2-6
2.6 Installation............................................................................................................................................... 2-8
2.6.1 Bench Top Use.................................................................................................................................. 2-8
2.6.2 Rack Mounting................................................................................................................................... 2-8
2.7 Wiring Instructions................................................................................................................................... 2-8
2.7.1 Safety Grounding............................................................................................................................... 2-8
2.7.2 Source Power Connections............................................................................................................... 2-9
2.7.3 D-C Output Grounding....................................................................................................................... 2-9
2.7.4 Power Supply/Load Interface............................................................................................................. 2-9
2.7.4.1 Cable Recommendations............................................................................................................. 2-10
2.7.5 Load Connection - General................................................................................................................ 2-10
2.7.5.1 Local Sensing/Remote Sensing Select........................................................................................ 2-11
2.7.5.2 Fast Mode/Slow Mode Select...................................................................................................... 2-11
2.7.5.3 Grounding Network Configuration................................................................................................ 2-11
2.7.5.4 Positive Output, Negative Terminal Grounded ............................................................................ 2-11
2.7.5.5 Negative Output, Positive Terminal Grounded ............................................................................ 2-12
2.8 Operating Configuration.......................................................................................................................... 2-13
2.9 Status Port............................................................................................................................................... 2-13
SECTION 3 - OPERATION
3.1 General.................................................................................................................................................... 3-1
3.2 Local Mode Operation............................................................................................................................. 3-1
3.2.1 Front Panel Keypad and LCD............................................................................................................ 3-1
3.2.1.1 Command Entry Status................................................................................................................ 3-1
3.2.1.2 Data Entry Status......................................................................................................................... 3-1
3.2.1.3 Display (LCD)............................................................................................................................... 3-1
3.2.1.4 Keypad Functions........................................................................................................................ 3-2

ii BHK 500-0.4MG SVC 032816
TABLE OF CONTENTS
SECTION PAGE
3.2.2 Turning the Power Supply On........................................................................................................... 3-4
3.2.3 Error Conditions................................................................................................................................ 3-5
3.2.4 Setting Local Mode........................................................................................................................... 3-5
3.2.5 Adjusting LCD Contrast .................................................................................................................... 3-6
3.2.6 Enabling/Disabling Audible Beeps.................................................................................................... 3-6
3.2.7 Enabling/Disabling DC Output Power............................................................................................... 3-6
3.2.7.1 Disabling DC Output when using Digital Inputs only (keypad and/or GPIB)............................... 3-6
3.2.7.2 Disabling DC Output when using Analog control........................................................................ 3-6
3.2.7.3 Remote Shutdown using External Trigger Port........................................................................... 3-7
3.2.7.4 Power Up DC Output Control...................................................................................................... 3-7
3.2.8 Reset Operation................................................................................................................................ 3-7
3.2.8.1 Setting Power-Up & Reset Current ............................................................................................. 3-7
3.2.9 Setting Output Voltage or Current..................................................................................................... 3-8
3.2.10 Changing Current Scale.................................................................................................................... 3-8
3.2.11 Setting Overvoltage or Overcurrent Protection................................................................................. 3-9
3.2.12 Changing Maximum Voltage or Current Value ................................................................................. 3-10
3.2.13 Storing Power Supply Output Settings.............................................................................................. 3-10
3.2.14 Recalling Stored Output Settings...................................................................................................... 3-11
3.2.15 Firmware Version.............................................................................................................................. 3-11
3.2.16 Local Mode Programming of the Power Supply................................................................................ 3-11
3.2.16.1 Creating or Modifying a Program (Program Edit Mode).............................................................. 3-11
3.2.16.1.1 Modifying Programmed Time Interval.....................................................................................3-12
3.2.16.1.2 Time Interval Accuracy...........................................................................................................3-12
3.2.16.2 Running a Program..................................................................................................................... 3-12
3.2.16.3 Stepping Through a Program...................................................................................................... 3-12
3.2.16.4 Cycling a Program....................................................................................................................... 3-14
3.2.16.5 Running a Program Once ........................................................................................................... 3-14
3.2.16.6 Stopping a Running Program...................................................................................................... 3-14
3.2.16.7 Sample Program......................................................................................................................... 3-14
3.2.17 Calibration......................................................................................................................................... 3-15
3.3 Remote Mode Programming Using SCPI commands via IEEE 488 (GPIB). Bus .................................. 3-15
3.3.1 IEEE 488 (GPIB) Bus Protocol ......................................................................................................... 3-15
3.3.2 DCL Control...................................................................................................................................... 3-17
3.3.3 Changing the GPIB Address............................................................................................................. 3-17
3.3.4 External Trigger ................................................................................................................................ 3-17
3.3.5 BHK-MG VISA Instrument driver ...................................................................................................... 3-18
3.3.6 Programming Techniques to Optimize performance ........................................................................ 3-18
3.3.6.1 Programming Voltage/Current Limit and Current/Voltage Limit.................................................. 3-18
3.3.6.2 Making Sure the Previous Command is Complete ..................................................................... 3-19
3.4 RS232-C Operation................................................................................................................................ 3-20
3.4.1 Setting RS 232 Baud Rate................................................................................................................ 3-21
3.4.2 Serial Interface.................................................................................................................................. 3-21
3.4.3 RS 232 Implementation .................................................................................................................... 3-21
3.4.3.1 Echo Mode.................................................................................................................................. 3-22
3.4.3.2 Prompt Method............................................................................................................................ 3-22
3.4.3.3 XON XOFF Method..................................................................................................................... 3-22
3.4.4 Isolating RS 232 Communication Problems ..................................................................................... 3-23
3.5 SCPI Programming................................................................................................................................. 3-23
3.5.1 SCPI Messages................................................................................................................................ 3-23
3.5.2 Common Commands/Queries .......................................................................................................... 3-24
3.5.3 SCPI Subsystem Command/Query Structure................................................................................... 3-24
3.5.3.1 ABORt Subsystem...................................................................................................................... 3-24
3.5.3.2 INITiate Subsystem..................................................................................................................... 3-24
3.5.3.3 LIST Subsystem.......................................................................................................................... 3-24
3.5.3.4 MEASure Subsystem.................................................................................................................. 3-24
3.5.3.5 OUTPut Subsystem .................................................................................................................... 3-24
3.5.3.6 Instrument Subsystem ................................................................................................................ 3-24

BHK 500-0.4MG SVC 020498 iii
TABLE OF CONTENTS
SECTION PAGE
3.5.3.7 STATus Subsystem..................................................................................................................... 3-25
3.5.3.8 System Subsystem...................................................................................................................... 3-25
3.5.3.9 TRIGger subsystem..................................................................................................................... 3-25
3.5.3.10 [SOURce:]VOLTage and [SOURce:]CURRent Subsystems....................................................... 3-25
3.5.3.11 CALibrate Subsystem.................................................................................................................. 3-25
3.5.4 Program Message Structure.............................................................................................................. 3-25
3.5.4.1 Keyword....................................................................................................................................... 3-26
3.5.4.2 Keyword Separator...................................................................................................................... 3-26
3.5.4.3 Query Indicator ............................................................................................................................ 3-26
3.5.4.4 Data ............................................................................................................................................. 3-27
3.5.4.5 Data Separator............................................................................................................................. 3-27
3.5.4.6 Message Unit Separator.............................................................................................................. 3-27
3.5.4.7 Root Specifier .............................................................................................................................. 3-29
3.5.4.8 Message Terminator.................................................................................................................... 3-29
3.5.5 Understanding The Command Structure........................................................................................... 3-29
3.5.6 Program Message Syntax Summary................................................................................................. 3-30
3.5.7 SCPI Program Examples................................................................................................................... 3-30
3.6 Remote Programming Using Analog Programming Terminals................................................................ 3-31
3.6.1 Analog Programming Warnings and Cautions................................................................................... 3-33
3.6.2 Programming with external resistance............................................................................................... 3-35
3.6.2.1 Voltage Mode............................................................................................................................... 3-37
3.6.2.2 Current Mode............................................................................................................................... 3-37
3.6.3 Programming with external voltage using a low impedance Voltage source..................................... 3-38
3.6.3.1 Voltage Mode............................................................................................................................... 3-42
3.6.3.2 Current Mode............................................................................................................................... 3-43
3.6.4 Programming with external voltage using a high impedance, low level (1V) Voltage source............ 3-43
3.6.4.1 Voltage Mode............................................................................................................................... 3-46
3.6.4.2 Current Mode............................................................................................................................... 3-46
3.6.5 Programming with external current source (1 mA)............................................................................ 3-47
3.6.5.1 Voltage Mode............................................................................................................................... 3-49
3.6.5.2 Current Mode............................................................................................................................... 3-49
3.7 Operating Modes..................................................................................................................................... 3-50
3.7.1 Slow/Fast mode of operation............................................................................................................. 3-50
3.7.2 Series operation................................................................................................................................. 3-52
3.7.2.1 Automatic series operation .......................................................................................................... 3-53
3.7.2.2 Master-slave series operation (Automatic Tracking).................................................................... 3-56
3.7.2.2.1 Voltage Mode Operation.........................................................................................................3-56
3.7.2.2.2 Current Mode Operation .........................................................................................................3-59
3.7.3 Parallel operation............................................................................................................................... 3-61
3.7.3.1 Automatic parallel operation ........................................................................................................ 3-62
3.7.3.2 Master-slave parallel operation.................................................................................................... 3-64
3.7.3.2.1 Voltage Mode Operation.........................................................................................................3-65
3.7.3.2.2 Current Mode Operation .........................................................................................................3-67
SECTION 4 - CALIBRATION
4.1 General.................................................................................................................................................... 4-1
4.2 Equipment Required................................................................................................................................ 4-1
4.3 Calibration Procedures Using Front Panel Keypad................................................................................. 4-1
4.3.1 Voltage Calibration ............................................................................................................................ 4-2
4.3.2 High Current Calibration.................................................................................................................... 4-3
4.3.3 Low Current Calibration..................................................................................................................... 4-4
4.4 Calibration Using IVI Driver..................................................................................................................... 4-5
4.4.1 Setup................................................................................................................................................. 4-5
4.4.2 Main Control Panel............................................................................................................................ 4-6

iv BHK 500-0.4MG SVC 032816
TABLE OF CONTENTS
SECTION PAGE
4.4.3 Calibration Controls .......................................................................................................................... 4-6
4.4.4 Calibration Procedure....................................................................................................................... 4-7
4.5 Changing the Calibration Password ....................................................................................................... 4-10
4.6 Restoring Previous Calibration Values................................................................................................... 4-11
4.7 Restoring Factory Calibration Values..................................................................................................... 4-11
4.8 Calibration Storage................................................................................................................................. 4-11
APPENDIX A - IEEE 488.2 COMMAND/QUERY DEFINITIONS
A-1 Introduction............................................................................................................................................. A-1
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-1
A.5 *ESR? — Event Status Register Query.................................................................................................. A-2
A.6 *IDN? — Identification Query.................................................................................................................. A-2
A.7 *OPC — Operation Complete Command............................................................................................... A-2
A.8 *OPC? — Operation Complete Query.................................................................................................... A-2
A.9 *RCL — Recall Command...................................................................................................................... A-2
A.10 *RST — Reset Command....................................................................................................................... A-3
A.11 * SAV — Save Command....................................................................................................................... A-3
A.12 *SRE — Service Request Enable Command......................................................................................... A-4
A.13 *SRE? — Service Request Enable Query.............................................................................................. A-4
A.14 *STB? — Status Byte Register Query.................................................................................................... A-4
A.15 *TRG — Trigger Command.................................................................................................................... A-4
A.16 *TST? — Self Test Query....................................................................................................................... A-4
APPENDIX B - SCPI COMMAND/QUERY DEFINITIONS
B-1 Introduction............................................................................................................................................. B-1
B.2 Numerical Values.................................................................................................................................... B-2
B.3 ABORt Command................................................................................................................................... B-2
B.4 CAL Commands and Queries................................................................................................................. B-2
B.5 DISPlay:CONTrast Command................................................................................................................ B-2
B.6 DISPlay:CONTrast? Query..................................................................................................................... B-2
B.7 DISPlay:MODE Command ..................................................................................................................... B-4
B.8 DISPlay:MODE? Query.......................................................................................................................... B-4
B.9 DISPlay:TEXT Command....................................................................................................................... B-4
B.10 DISPlay:TEXT? Query............................................................................................................................ B-4
B.11 INITiate[:IMMediate] Command.............................................................................................................. B-4
B.12 INITiate:CONTinuous Command............................................................................................................ B-4
B.13 INITiate:CONTinuous? Query................................................................................................................. B-4
B.14 INSTrument:STATe Command............................................................................................................... B-5
B.15 INSTrument:STATe? Query ................................................................................................................... B-5
B.16 [SOURce:]LIST:CLEar Command.......................................................................................................... B-5
B.17 [SOURce:]LIST:COUNt Command......................................................................................................... B-5
B.18 [SOURce:]LIST:COUNt? Query.............................................................................................................. B-5
B.19 [SOURce:]LIST:COUNt:SKIP Command................................................................................................ B-5
B.20 [SOURce:]LIST:COUNt:SKIP? Query .................................................................................................... B-5
B.21 [SOURce:]LIST:CURRent Command..................................................................................................... B-5
B.22 [SOURce:]LIST:CURRent? Query.......................................................................................................... B-6
B.23 [SOURce:]LIST:CURRent:POINts? Query............................................................................................. B-6
B.24 [SOURce:]LIST:DIRection Command..................................................................................................... B-6
B.25 [SOURce:]LIST:DIRection? Query ......................................................................................................... B-6
B.26 [SOURce:]LIST:DWELl Command......................................................................................................... B-6
B.27 [SOURce:]LIST:DWELl? Query.............................................................................................................. B-6
B.28 [SOURce:]LIST:DWELl:POINts? Query ................................................................................................. B-6

BHK 500-0.4MG SVC 020498 v
TABLE OF CONTENTS
SECTION PAGE
B.29 [SOURce:]LIST:QUERy Command........................................................................................................ B-7
B.30 [SOURce:]LIST:QUERy? Query............................................................................................................. B-7
B.31 [SOURce:]LIST:VOLTage Command..................................................................................................... B-7
B.32 [SOURce:]LIST:VOLTage? Query ......................................................................................................... B-7
B.33 [SOURce:]LIST:VOLTage:POINts? Query............................................................................................. B-7
B.34 MEASure[:SCALar]:CURRent[:DC]? Query........................................................................................... B-9
B.35 MEASure:VOLTage[:SCALar][:DC]? Query........................................................................................... B-9
B.36 OUTPut[:STATe] Command................................................................................................................... B-9
B.37 OUTPut[:STATe]? Query ....................................................................................................................... B-9
B.38 [SOURce:]CURRent[:LEVel][:IMMediate][:AMPlitude] Command.......................................................... B-10
B.39 [SOURce:]CURRent[:LEVel][:IMMediate][:AMPlitude]? Query .............................................................. B-10
B.40 [SOURce:]CURRent:LIMit[:HIGH] Command......................................................................................... B-10
B.41 [SOURce:]CURRent:LIMit[:HIGH]? Query ............................................................................................. B-10
B.42 [SOURce:]CURRent:MODE Command.................................................................................................. B-10
B.43 [SOURce:]CURRent:MODE? Query ...................................................................................................... B-11
B.44 [SOURce:]CURRent:PROTection[:LEVel] Command............................................................................ B-11
B.45 [SOURce:]CURRent:PROTection[:LEVel]? Query................................................................................. B-11
B.46 [SOURce:]CURRent:RANGe Command................................................................................................ B-11
B.47 [SOURce:]CURRent:RANGe? Query..................................................................................................... B-11
B.48 [SOURce:]CURRent[:LEVel]:TRIGgered[:AMPlitude] Command........................................................... B-11
B.49 [SOURce:]CURRent[:LEVel]:TRIGgered[:AMPlitude]? Query ............................................................... B-12
B.50 [SOURce:]VOLTage[:LEVel][:IMMediate][:AMPlitude] Command.......................................................... B-12
B.51 [SOURce:]VOLTage[:LEVel][:IMMediate][:AMPlitude]? Query .............................................................. B-12
B.52 [SOURce:]VOLTage:LIMit[:HIGH] Command......................................................................................... B-12
B.53 [SOURce:]VOLTage:LIMit[:HIGH]? Query ............................................................................................. B-13
B.54 [SOURce:]VOLTage:MODE Command.................................................................................................. B-13
B.55 [SOURce:]VOLTage:MODE? Query ...................................................................................................... B-13
B.56 [SOURce:]VOLTage:PROTection[:LEVel] Command............................................................................ B-13
B.57 [SOURce:]VOLTage:PROTection[:LEVel]? Query................................................................................. B-13
B.58 [SOURce:]VOLTage[:LEVel]:TRIGgered[:AMPlitude] Command........................................................... B-13
B.59 [SOURce:]VOLTage[:LEVel]:TRIGgered[:AMPlitude]? Query ............................................................... B-14
B.60 [SOURce:]FUNCtion:MODE? Query...................................................................................................... B-14
B.61 STATus:OPERation:CONDition? Query................................................................................................. B-14
B.62 STATus:OPERation:ENABle Command ................................................................................................ B-15
B.63 STATus:OPERation:ENABle? Query..................................................................................................... B-15
B.64 STATus:OPERation[:EVENt]? Query..................................................................................................... B-15
B.65 STATus:PRESet Command................................................................................................................... B-16
B.66 STATus:QUEStionable[:EVENt]? Query................................................................................................ B-16
B.67 STATus:QUEStionable:CONDition? Query............................................................................................ B-16
B.68 STATus:QUEStionable:ENABle Command............................................................................................ B-16
B.69 STATus:QUEStionable:ENABle? Query ................................................................................................ B-16
B.70 SYSTem:BEEP Command..................................................................................................................... B-17
B.71 SYSTem:COMMunication:GPIB:ADDRess Command......................................................................... B-17
B.72 SYSTem:COMMunication:GPIB:ADDRess? Query............................................................................... B-17
B.73 SYSTem:COMMunication:SERial:BAUD Command.............................................................................. B-17
B.74 SYSTem:COMMunication:SERial:BAUD? Query................................................................................... B-17
B.75 SYSTem:COMMunication:SERial:ECHO Command ............................................................................. B-17
B.76 SYSTem:COMMunication:SERial:ECHO? Query.................................................................................. B-17
B.77 SYSTem:COMMunication:SERial:PACE Command.............................................................................. B-17
B.78 SYSTem:COMMunication:SERial:PACE? Query................................................................................... B-18
B.79 SYSTem:COMMunication:SERial:PROMpt CommanD ......................................................................... B-18
B.80 SYSTem:COMMunication:SERial:PROMpt? Query............................................................................... B-18
B.81 SYSTem:ERRor? Query ........................................................................................................................ B-18

vi BHK 500-0.4MG SVC 032816
TABLE OF CONTENTS
SECTION PAGE
B.82 SYSTem:ERRor:CODE? Query ............................................................................................................. B-18
B.83 SYSTem:ERRor:CODE:ALL? Query...................................................................................................... B-18
B.84 SYSTem:KLOCk Command................................................................................................................... B-19
B.85 SYSTem:KLOCk? Query........................................................................................................................ B-19
B.86 SYSTem:PASSword:CENable Command.............................................................................................. B-19
B.87 SYSTem:PASSword:CDISable Command............................................................................................. B-19
B.88 SYSTem:PASSword:NEW Command.................................................................................................... B-19
B.89 SYSTem:PASSword:STATe? Query...................................................................................................... B-19
B.90 SYSTem:SECurity:IMMediate Command............................................................................................... B-20
B.91 SYSTem:VERSion? Query..................................................................................................................... B-20
B.92 TRIGger:SOURce Command................................................................................................................. B-20

LIST OF FIGURES
FIGURE TITLE PAGE
BHK 500-0.4MG SVC 032816 vii
1-1 BHK-MG Series Programmable Power Supply............................................................................................. xi
1-2 BHK Series Power Supply, Mechanical Outline Drawing............................................................................ 1-6
1-3 Connector A2J5 Location............................................................................................................................ 1-9
2-1 BHK-MG Series, Front Panel Controls, Indicators and Connectors............................................................ 2-1
2-2 BHK-MG Series, Rear Panel Controls and Connections............................................................................ 2-3
2-3 LCD Power On Defaults.............................................................................................................................. 2-7
2-4 Local Sensing, Slow Mode Selected, Grounding Network Connected,
Floating Output (Factory Default Configuration)....................................................................................... 2-12
2-5 Remote Sensing, Fast Mode Selected, Positive Output Grounded............................................................ 2-12
2-6 Status Port Opto-coupler Active “High” Configuration................................................................................. 2-13
2-7 Status Port Opto-coupler Active “Low” Configuration ................................................................................. 2-13
3-1 LCD Power On Defaults.............................................................................................................................. 3-5
3-2 Programming Example to Verify Previous Command has Completed........................................................ 3-20
3-3 RS 232 Implementation .............................................................................................................................. 3-22
3-4 Message Structure...................................................................................................................................... 3-27
3-5 Tree Diagram of SCPI Commands Used with BHK-MG Power Supply...................................................... 3-28
3-6 Typical Example Of BHK-MG Power Supply Program Using SCPI Commands......................................... 3-31
3-7 Analog Voltage Programming, Simplified Diagram..................................................................................... 3-32
3-8 Analog Current Programming, Simplified Diagram..................................................................................... 3-32
3-9 Analog Programming of Output Voltage (Voltage Mode)
or Voltage Limit (Current Mode) using Resistance.................................................................................. 3-35
3-10 Analog Programming of Output Current (Current Mode)
or Current Limit (Voltage Mode) using Resistance.................................................................................. 3-36
3-11 Analog Programming of Output Voltage (Voltage Mode) or Voltage Limit
(Current Mode) using Isolated (floating) Low Impedance Voltage Source (VS)...................................... 3-38
3-12 Analog Programming of Output Voltage (Voltage Mode) or Voltage
Limit (Current Mode) using Grounded Low Impedance Voltage Source (VS)......................................... 3-39
3-13 Analog Programming of Output Current (Current Mode) or Current Limit
(Voltage Mode) using Isolated (Floating) Low Impedance Voltage Source (VS).................................... 3-40
3-14 Analog Programming of Output Current (Current Mode) or Current
Limit (Voltage Mode) using Grounded Low Impedance Voltage Source (VS) ........................................ 3-41
3-15 Analog Programming of Output Voltage (Voltage Mode) or Voltage
Limit (Current Mode) using High Impedance, Low Level (1V) Voltage Source (VS)............................... 3-44
3-16 Analog Programming of Output Current (Current Mode) or Current
Limit (Voltage Mode) using High Impedance, Low Level (1V) Voltage Source (VS)............................... 3-45
3-17 Analog Programming of Output Voltage (Voltage Mode) or Voltage
Limit (Current Mode) using Current Source (1mA) (CS)......................................................................... 3-47
3-18 Analog Programming of Output Current (Current Mode) or Current
Limit (Voltage Mode) using Current Source (1mA) (CS)......................................................................... 3-48
3-19 Slow Mode/Fast Mode Operation ............................................................................................................... 3-51
3-20 Series Automatic Configuration .................................................................................................................. 3-55
3-21 Series Master-Slave (Voltage Mode) Configuration.................................................................................... 3-58
3-22 Series Master-Slave (Current Mode) Configuration.................................................................................... 3-59
3-23 Parallel Automatic Configuration................................................................................................................. 3-63
3-24 Parallel Master-Slave (Voltage Mode) Configuration.................................................................................. 3-65
3-25 Parallel Master-Slave (Current Mode) Configuration.................................................................................. 3-68
4-1 Input VISA Resource Descriptor................................................................................................................. 4-5
4-2 Main Control Panel, Typical........................................................................................................................ 4-6
4-3 Calibration Controls .................................................................................................................................... 4-7
4-4 Password Entry........................................................................................................................................... 4-8
4-5 Voltage Calibration...................................................................................................................................... 4-8
4-6 Current Magnifier Window .......................................................................................................................... 4-9
A-1 GPIB Commands....................................................................................................................................... A-3
B-1 Programming the Output............................................................................................................................ B-3
B-2 Using Display Commands.......................................................................................................................... B-3
B-3 Using LIST Commands and Queries ......................................................................................................... B-8
B-4 Programming Current ................................................................................................................................ B-12

LIST OF FIGURES
FIGURE TITLE PAGE
viii BHK 500-0.4MG SVC 032816
B-5 Programming Voltage................................................................................................................................. B-14
B-6 Using Status Commands and Queries....................................................................................................... B-15
B-7 Using System Commands and Queries..................................................................................................... B-19

BHK 500-0.4MG SVC 020498 ix
LIST OF TABLES
TABLE TITLE PAGE
1-1 Model Parameters .......................................................................................................................................1-2
1-2 BHK-MG 200W Specifications ....................................................................................................................1-2
1-3 Connector A2J5 Signal Descriptions ..........................................................................................................1-13
1-4 Equipment Supplied ....................................................................................................................................1-13
1-5 Accessories .................................................................................................................................................1-14
1-6 Safety Symbols ...........................................................................................................................................1-14
2-1 Controls, Indicators, and Connectors ..........................................................................................................2-2
2-2 Trigger Port Pin Assignments .....................................................................................................................2-2
2-3 RS232C Port Input/Output Pin Assignments ..............................................................................................2-3
2-4 Status Port Connector Pin Assignments .....................................................................................................2-4
2-5 IEEE 488 Port Connector Pin Assignments ................................................................................................2-4
2-7 Voltage Programming Terminal Strip TB2, Terminal Assignments .............................................................2-5
2-8 Current Programming Terminal Strip TB3, Terminal Assignments .............................................................2-5
2-6 Rear Output Terminal Strip TB1 Terminal Assignments .............................................................................2-5
2-9 Internal Jumper Configuration .....................................................................................................................2-13
3-1 LCD Messages ...........................................................................................................................................3-2
3-2 Key Functions .............................................................................................................................................3-2
3-3 Error Conditions ..........................................................................................................................................3-5
3-4 Memory Location Worksheet ......................................................................................................................3-13
3-5 Sample Program (Model BHK-MG 500-0.4MG) ..........................................................................................3-15
3-6 IEEE 488 (GPIB) Bus Interface Functions ..................................................................................................3-15
3-7 IEEE 488 (GPIB) Bus Command Mode Messages .....................................................................................3-16
3-8 IEEE 488 (GPIB) Bus Data Mode Messages ..............................................................................................3-17
3-9 Rules Governing Shortform Keywords ........................................................................................................3-26
3-10 Feedback Resistor and Current Sensing Resistor Values ..........................................................................3-36
4-1 VISA Resource String Corresponding to Interface .....................................................................................4-5
4-2 Calibration Panel Functions ........................................................................................................................4-7
4-3 Factory Default Calibration Passwords .......................................................................................................4-10
4-4 Calibration Storage .....................................................................................................................................4-12
A-1 IEEE 488.2 Command/query Index ...........................................................................................................A-1
A-2 Standard Event Status Enable Register and Standard Event Status Register Bits ...................................A-1
A-3 Service Request Enable and Status Byte Register Bits .............................................................................A-4
B-1 SCPI Subsystem Command/query Index ..................................................................................................B-1
B-2 Operation Condition Register, Operation Enable Register,
and Operation Event Register Bits ..........................................................................................................B-14
B-3 Questionable Event Register, Questionable Condition Register
and Questionable Condition Enable Register Bits ..................................................................................B-16
B-4 Error Messages ..........................................................................................................................................B-20

x032816
SERVICE
SAFETY INSTRUCTIONS
Read these safety instructions, as well as the applicable installation, operating and servicing instructions
contained in this manual before using the power supply.
Do not touch the output terminals. The high voltage 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.
CAUTION
If this power supply is used in OEM equipment, the OEM equipment manufacturer is responsible for
attaching appropriate warning labels on the OEM equipment.
Operating the power supply outside the specified limits for input voltage, temperature, or other environ-
mental conditions noted in this manual can damage the power supply and void the warranty.
Safety Messages
The BHK-MG can be controlled by digital and/or analog inputs. When OUTPUT is set to off from the key-
pad or the GPIB, an analog input will still produce an output from the BHK-MG which will be indicated on
the LCD. If the output is greater than 8 Volts and the current is higher than 2 LSB’s, a shutdown sequence
begins: the unit will beep, the LCD will flash DIGITAL IS OFF and SET ANALOG OFF, and the unit will shut
down within 25 seconds unless the analog input is turned off. The beeping and controlled shutdown func-
tion can be overridden by a jumper option (see Table 2-9.)
There are no operator serviceable parts inside the case. 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 sym-
bols used on the power supply or in this manual where applicable.
SAFETY SYMBOLS
SYMBOL Meaning SYMBOL Meaning
WARNING: RISK OF ELECTRIC
SHOCK. WARNING INDICATES THE POSSIBILITY OF BODILY INJURY OR DEATH.
CAUTION: REFER TO REFER-
ENCED PROCEDURE. CAUTION INDICATES THE POSSIBILITY OF EQUIPMENT DAMAGE.
WARNING
!

BHK-MG032816 xi
FIGURE 1-1. BHK-MG SERIES PROGRAMMABLE POWER SUPPLY

xii BHK-MG032816

BHK-MG (OPR) 032816 1-1
SECTION 1 - INTRODUCTION
1.1 SCOPE OF MANUAL
This manual contains instructions for the installation and operation of the BHK-MG series of
200W output power stabilized voltage or current, d-c power supplies manufactured by KEPCO,
Inc., Flushing, New York, U.S.A.
DANGEROUS AND LETHAL POTENTIALS ARE PRESENT,
BOTH WITHIN THIS POWER SUPPLY, AND AT THE OUTPUT!
Before proceeding to use the power supply, read this manual very care-
fully. Caution must be used when working with, and making connections
to, this power supply. Use only wires with the proper voltage rating for
high voltage connections. Use the designated plugs for the front panel
output. Be extremely careful when analog programming inputs are used,
especially with the negative output of the power supply grounded.
Unless otherwise specified, always connect the test and measuring
equipment to the input power source using an isolating transformer hav-
ing a suitable isolating voltage rating. Follow all instructions regarding the
grounding of the test set-up. Refer all servicing to qualified service per-
sonnel only.
1.2 GENERAL DESCRIPTION
The BHK-MG Power Supply Series (Figure 1-1) are full-range, automatic crossover, linear volt-
age/current stabilizers with a full rectangular output characteristic. Four single-output models
are available, each of which have two output current ranges as listed in Table1-1.
Although designed as a stand-alone bench top unit, the full-rack cross section permits mounting
in a standard 19-inch wide rack (see Table1-5). Connections can be made at both rear output
terminals (recommended for rack mounted configurations) and front output terminals (recom-
mended for bench applications). Sensing output terminals are available at the rear terminals
only. These power supplies operate from either 115V or 230V a-c (nominal - switch selectable),
50 or 60 Hz (nominal) input source power. Since there are no internal adjustments, BHK-MG
Power Supplies offer excellent output voltage/current stability and easy calibration.
Output voltage and current are displayed on an alphanumeric Liquid Crystal Display (LCD).
Control of the BHK-MG can be either local, via the front panel keypad and display, or remote -
using either analog signals (applied to Analog Programming Terminals), or digital programming
via either the IEEE 488.2 (GPIB) or RS 232 communication bus using SCPI commands. Both
digital control (either local or remote) and analog control can be used simultaneously. Digital
control is done with 12 bits of resolution over the entire voltage/current range.
1.3 SPECIFICATIONS
Table 1-1 lists the parameters applicable to individual models. Table 1-2 lists general specifica-
tions applicable to all models except where otherwise noted.
WARNING

1-2 BHK-MG (OPR) 032816
TABLE 1-1. MODEL PARAMETERS
MODEL
NUMBER
OUTPUT
VOLTAGE
RANGE
(VOLTS)
OUTPUT
CURRENT
RANGE
(mA)
MAXIMUM
OUTPUT
POWER
(WATTS)
OUTPUT EQUIVALENT IMPEDANCE (FAST MODE)
VOLTAGE MODE
(SERIES R–L) CURRENT MODE (PARALLEL R–C)
Rd-c (Ohms) L (mH) Rd-c (MOhms) C (F)
BHK 300-0.6MG 0 - 300 0 - 600 180 0.025 2.0 3.33 0.013
0 - 60 18 33.3 0.008
BHK 500-0.4MG 0 - 500 0 - 400 200 0.0625 3.6 8.3 0.012
0 - 40 20 83 0.007
BHK 1000-0.2MG 0 - 1000 0 - 200 200 0.25 6.0 33 0.005
0 - 20 20 333 0.003
BHK 2000-0.1MG 0 - 2000 0 - 100 200 1.0 35 133 0.002
0 - 10 20 1333 0.001
TABLE 1-2. BHK-MG 200W SPECIFICATIONS
SPECIFICATION RATING/DESCRIPTION CONDITION
INPUT CHARACTERISTICS
a-c Voltage nominal (switch selectable) 115/230V a-c Single phase
range (switch selectable) 105-125/210-250V a-c
Frequency nominal 50-60Hz
range 47-63Hz
Current 115V a-c 4.0A a-c 200W at output
230V a-c 2.1A a-c
OUTPUT CHARACTERISTICS
NOTE: Current specifications contained in this table refer to source current (delivered by the unit to the load). Sink current (absorbed
by the unit from the load) occurs when the output voltage is programmed to a lower value. The sink current is constant, from
45% to 55% of High Current scale rating; it flows until the output reaches the lower voltage.
Type of Stabilizer Linear with automatic
crossover Voltage/Current
Adjustment range
(Adjustment is either continu-
ous using analog program-
ming, or stepped using digital
programming)
Voltage 0 to 100% of rating See PAR. 1.4.2.2 and 1.4.2.3 for details
about analog programming and readback.
Use Menu program to change current
scale (See PAR 3.2.10)
Current 0-100% of rating,
or 0-10% of rating
Digital Programming
resolution Voltage and Current 0.025% of rating Current measurement requires calibrated shunt (see PAR. 4.2)
Digital Programming accuracy Voltage 0.025% of rating
Current 0.05% of rating Both current scales
Digital Data Readback
accuracy Voltage 0.05% of rating
Current 0.05% of rating Both current scales, 10-100% of rating
0.005% of rating Both current scales, <10% of rating (auto-
matic 10X magnifier)
Source effect Voltage 0.001% EOmax Input voltage
105-125/210-250V a-c
Current 0.002% IOmax
Load effect Voltage 0.005% EOmax no load - full load
Current 0.015% IOmax short - full load