KEPCO BIT 4886 User manual

KEPCO®
THE POWER SUPPLIER™
MODEL
OPERATOR MANUAL
KEPCO INC.
An ISO 9001 Company.
KEPCO, INC. z131-38 SANFORD AVENUE zFLUSHING, NY. 11355 U.S.A. zTEL [phone] zFAX [phone]
email: [e-mail] zWorld Wide Web: http://www.kepcopower.com
©2010, KEPCO, INC
P/N 243-1303
BIT 4886
DIGITAL INTERFACE CARD
WITH GPIB AND RS 232 CAPABILITY
BIT 4886
INTERFACE CARD
IMPORTANT NOTES:
1) This manual is valid for the following Firmware Versions:
FIRMWARE VERSION NOTE.
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.

BIT 4886051010 i
TABLE OF CONTENTS
SECTION PAGE
SECTION 1 - INTRODUCTION
1.1 Scope of Manual ..................................................................................................................................... 1-1
1.2 General Description................................................................................................................................. 1-1
1.2.1 Measurements................................................................................................................................... 1-1
1.2.2 Enhanced Operation.......................................................................................................................... 1-2
1.3 Specifications .......................................................................................................................................... 1-2
1.3.1 BIT 4882 Compatibility....................................................................................................................... 1-4
SECTION 2 - INSTALLATION
2.1 Unpacking and Inspection ....................................................................................................................... 2-1
2.2 Set Start-up Defaults ............................................................................................................................... 2-1
2.2.1 Set (GPIB) Device Address ............................................................................................................... 2-2
2.2.2 Power Supply Identification ............................................................................................................... 2-2
2.3 Installation of Interface Card into the BOP .............................................................................................. 2-4
2.4 Input/Output Signals................................................................................................................................ 2-6
2.5 Initial Check-out Procedure ..................................................................................................................... 2-7
SECTION 3 - CALIBRATION
3.1 Equipment Required................................................................................................................................ 3-1
3.2 BOP Power Supply Adjustments ............................................................................................................. 3-1
3.2.1 Adjustment of the Bop ±10 Volt Calibration Controls (R31, R32) ...................................................... 3-1
3.2.2 Adjustment of the Ammeter Zero (R50)............................................................................................. 3-1
3.3 Calibration of BIT 4886 Interface Card .................................................................................................... 3-3
3.3.1 Manual calibration.............................................................................................................................. 3-6
3.3.2 Calibration of BIT 4886 Interface Card using the VISA Driver Soft Panel ......................................... 3-9
3.3.2.1 Calibration Basics ........................................................................................................................ 3-10
3.3.2.2 Calibration Procedure .................................................................................................................. 3-11
SECTION 4 - OPERATION
4.1 General.................................................................................................................................................... 4-1
4.1.1 Programming Techniques to Optimize Power Supply performance .................................................. 4-1
4.1.1.1 Example of Proper Programming................................................................................................. 4-1
4.1.1.2 Making Sure the Previous Command is Complete ...................................................................... 4-1
4.2 Initialization of the BIT 4886 Card ........................................................................................................... 4-3
4.2.1 Initialization using CVI Driver - GPIB Port Only................................................................................. 4-3
4.2.2 Initialization using SCPI Commands and GPIB Port ......................................................................... 4-4
4.2.3 Initialization using SCPI Commands and RS 232 Port ...................................................................... 4-5
4.2.4 Password Setup................................................................................................................................. 4-5
4.2.4.1 Forgotten Passwords ................................................................................................................... 4-5
4.3 Built in Test.............................................................................................................................................. 4-6
4.3.1 Power-up Test ................................................................................................................................... 4-6
4.3.2 Confidence Test................................................................................................................................. 4-6
4.3.3 BOP test ............................................................................................................................................ 4-6
4.4 IEEE 488 (GPIB) Bus Protocol ................................................................................................................ 4-7
4.5 RS232-C Operation................................................................................................................................. 4-8
4.5.1 Serial INterface.................................................................................................................................. 4-9
4.5.2 RS 232 Implementation ..................................................................................................................... 4-9
4.5.2.1 Echo Mode................................................................................................................................... 4-11
4.5.2.2 XON XOFF Method...................................................................................................................... 4-11
4.5.2.3 Isolating RS 232 Communication Problems ................................................................................ 4-11
4.5.3 Using SCPI commands for RS 232 Communication. ........................................................................ 4-12
4.6 SCPI Programming ................................................................................................................................. 4-12
4.6.1 SCPI Messages ................................................................................................................................. 4-12
4.6.2 Common Commands/Queries ........................................................................................................... 4-12
4.6.3 SCPI Subsystem Command/Query Structure.................................................................................... 4-12
4.6.3.1 Initiate Subsystem........................................................................................................................ 4-13

ii BIT 4886051010
TABLE OF CONTENTS
SECTION PAGE
4.6.3.2 Measure Subsystem ................................................................................................................... 4-13
4.6.3.3 [Source:]voltage And [Source:]current Subsystems.................................................................... 4-13
4.6.3.4 Output Subsystem....................................................................................................................... 4-14
4.6.3.5 List Subsystem............................................................................................................................ 4-14
4.6.3.5.1 Required LIST Commands..................................................................................................... 4-14
4.6.3.5.2 Other Required Commands ................................................................................................... 4-14
4.6.3.5.3 Other Useful Commands........................................................................................................ 4-15
4.6.3.5.4 Optional Commands............................................................................................................... 4-15
4.6.3.6 Status Subsystem ....................................................................................................................... 4-15
4.6.3.7 System Subsystem ..................................................................................................................... 4-15
4.6.4 Program Message Structure ............................................................................................................. 4-15
4.6.4.1 Keyword ...................................................................................................................................... 4-16
4.6.4.2 Keyword Separator ..................................................................................................................... 4-16
4.6.4.3 Query Indicator............................................................................................................................ 4-17
4.6.4.4 Data............................................................................................................................................. 4-17
4.6.4.5 Data Separator............................................................................................................................ 4-17
4.6.4.6 Message Unit Separator ............................................................................................................. 4-17
4.6.4.7 Root Specifier.............................................................................................................................. 4-17
4.6.4.8 Message Terminator ................................................................................................................... 4-17
4.6.5 Understanding The Command Structure .......................................................................................... 4-18
4.6.6 Program Message Syntax Summary ................................................................................................ 4-18
4.6.7 SCPI Program Example.................................................................................................................... 4-19
4.7 Enhanced Operation............................................................................................................................... 4-19
4.7.1 Error Detection.................................................................................................................................. 4-20
4.7.2 Limit Channel Control ....................................................................................................................... 4-20
4.7.3 Using and Saving System Variables................................................................................................. 4-21
4.7.4 Flash Memory EEPROM Operation.................................................................................................. 4-21
4.7.4.1 Calibration Storage ..................................................................................................................... 4-24
APPENDIX A - SCPI COMMON 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-2
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-3
A.9 *OPT? — Options Query ........................................................................................................................ A-4
A.10 *RCL — Recall Command ...................................................................................................................... A-4
A.11 *RST — Reset Command....................................................................................................................... A-4
A.12 * SAV — Save Command...................................................................................................................... A-4
A.13 *SRE — Service Request Enable Command ......................................................................................... A-4
A.14 *SRE? — Service Request Enable Query .............................................................................................. A-5
A.15 *STB? — Status Byte Register Query .................................................................................................... A-5
A.16 *TRG — Trigger Command .................................................................................................................... A-5
A.17 *TST? — Self Test Query ....................................................................................................................... A-5
A.18 *WAI — Wait-To-Continue Command .................................................................................................... A-5
APPENDIX B - SCPI COMMAND/QUERY DEFINITIONS

BIT 4886051010 iii
TABLE OF CONTENTS
SECTION PAGE
B.1 Introduction............................................................................................................................................. B-1
B.2 Numerical Values ................................................................................................................................... B-2
B.3 CALibrate:CPRotect Command ............................................................................................................. B-2
B.4 CALibrate:STATus Command ................................................................................................................ B-2
B.5 CALibrate[:STATus]? Query................................................................................................................... B-2
B.6 CALibrate:CURRent Command ............................................................................................................. B-3
B.7 CALibrate:DATA Command ................................................................................................................... B-3
B.8 CALibrate:DPOT Command................................................................................................................... B-3
B.9 CALibrate:LCURR Command ................................................................................................................ B-4
B.10 CALibrate:LVOLT Command ................................................................................................................. B-4
B.11 CALibrate:SAVE Command ................................................................................................................... B-4
B.12 CALibrate:VOLTage Command ............................................................................................................. B-4
B.13 CALibrate:VPRotect Command.............................................................................................................. B-4
B.14 CALibrate:ZERO Command................................................................................................................... B-4
B.15 INITiate[:IMMediate] Command ............................................................................................................. B-5
B.16 INITiate:CONTinuous Command ........................................................................................................... B-5
B.17 INITiate:CONTinuous Query .................................................................................................................. B-5
B.18 MEASure[:SCALar]:CURRent[:DC]? Query ........................................................................................... B-5
B.19 MEASure[:VOLTage][:SCALar][:DC]? Query ......................................................................................... B-5
B.20 OUTPut[:STATe] Command................................................................................................................... B-5
B.21 OUTPut[:STATe] Query ......................................................................................................................... B-5
B.22 [SOURce:]FUNCtion:MODE Command ................................................................................................. B-6
B.23 [SOURce:]FUNCtion:MODE? Query ...................................................................................................... B-6
B.24 [SOURce:]FUNCtion:MODE:TRIGger .................................................................................................... B-6
B.25 [SOURce:]FUNCtion:MODE:TRIGger? Query ....................................................................................... B-6
B.26 [SOURce:]LIST:CLEar Command.......................................................................................................... B-6
B.27 [SOURce:]LIST:COUNt Command......................................................................................................... B-6
B.28 [SOURce:]LIST:COUNt? Query ............................................................................................................. B-6
B.29 [SOURce:]LIST:COUNt:SKIP Command ............................................................................................... B-7
B.30 [SOURce:]LIST:COUNt:SKIP? Query .................................................................................................... B-7
B.31 [SOURce:]LIST:CURRent Command..................................................................................................... B-7
B.32 [SOURce:]LIST:CURRent? Query ......................................................................................................... B-7
B.33 [SOURce:]LIST:CURRent:POINts? Query............................................................................................. B-7
B.34 [SOURce:]LIST:DIRection Command .................................................................................................... B-8
B.35 [SOURce:]LIST:DIRection? Query......................................................................................................... B-8
B.36 [SOURce:]LIST:DWELl Command......................................................................................................... B-8
B.37 [SOURce:]LIST:DWELl? Query.............................................................................................................. B-8
B.38 [SOURce:]LIST:DWELl:POINts? Query ................................................................................................. B-8
B.39 [SOURce:]LIST:GENeration Command ................................................................................................. B-12
B.40 [SOURce:]LIST:GENeration? Query ...................................................................................................... B-12
B.41 [SOURce:]LIST:QUERy Command........................................................................................................ B-12
B.42 [SOURce:]LIST:QUERy? Query............................................................................................................. B-12
B.43 [SOURce:]LIST:SEQuence Command................................................................................................... B-12
B.44 [SOURce:]LIST:SEQuence? Query ....................................................................................................... B-12
B.45 [SOURce:]LIST:VOLTage Command..................................................................................................... B-13
B.46 [SOURce:]LIST:VOLTage? Query ......................................................................................................... B-13
B.47 [SOURce:]LIST:VOLTage:POINts? Query............................................................................................. B-13
B.48 [SOURce:]CURRent[:LEVel][:IMMediate][:AMPlitude] Command.......................................................... B-13
B.49 [SOURce:]CURRent[:LEVel][:IMMediate][:AMPlitude] Query ................................................................ B-13
B.50 [SOURce:]CURRent:MODe Command .................................................................................................. B-14
B.51 [SOURce:]CURRent:MODE? Query ..................................................................................................... B-15
B.52 [SOURce:]CURRent:[:LEVel]RANGe Command ................................................................................... B-15
B.53 [SOURce:]CURRent:[:LEVel]RANGe? Query ........................................................................................ B-15
B.54 [SOURce:]CURRent:[:LEVel]RANGe:AUTO Command ........................................................................ B-15
B.55 [SOURce:]CURRent[:LEVel]TRIGgered[:AMPlitude] Command............................................................ B-15
B.56 [SOURce:]CURRent[:LEVel]TRIGgered[:AMPlitude]? Query ................................................................ B-15
B.57 [SOURce:]VOLTage[:LEVel][:IMMediate][:AMPlitude] Command.......................................................... B-16

iv BIT 4886051010
TABLE OF CONTENTS
SECTION PAGE
B.58 [SOURce:]VOLTage[:LEVel][:IMMediate][:AMPlitude]? Query............................................................... B-16
B.59 [SOURce:]VOLTage:MODE Command.................................................................................................. B-16
B.60 [SOURce:]VOLTage:MODE? Query....................................................................................................... B-17
B.61 [SOURce:]VOLTage[:LEVel]:RANGe Command.................................................................................... B-17
B.62 [SOURce:]VOLTage:[:LEVel]RANGe? Query ........................................................................................ B-17
B.63 [SOURce:]VOLTage:[:LEVel]RANGe:AUTO Command......................................................................... B-17
B.64 [SOURce:]VOLTage[:LEVel]:TRIGgered[:AMPlitude] Command........................................................... B-17
B.65 [SOURce:]VOLTage:[:LEVel]:TRIGgered[:AMPlitude]? Query............................................................... B-17
B.66 STATus:OPERation:CONDition Query................................................................................................... B-18
B.67 STATus:OPERation:ENABle Command................................................................................................. B-18
B.68 STATus:OPERation:ENABle? Query ..................................................................................................... B-18
B.69 STATus:OPERation[:EVENt]? Query ..................................................................................................... B-18
B.70 STATus:PRESet Command ................................................................................................................... B-18
B.71 STATus:QUEStionable[:EVENt]? Query ................................................................................................ B-19
B.72 STATus:QUEStionable:CONDition? Query ............................................................................................ B-20
B.73 STATus:QUEStionable:ENABle Command............................................................................................ B-20
B.74 STATus:QUEStionable:ENABle? Query................................................................................................. B-20
B.75 SYSTem:BEEP Command ..................................................................................................................... B-20
B.76 SYSTem:COMMunication:SERial:ECHO Command ............................................................................ B-20
B.77 SYSTem:COMMunication:SERial:ECHO? Query .................................................................................. B-20
B.78 SYSTem:COMMunication:SERial:PACE Command............................................................................. B-20
B.79 SYSTem:COMMunication:SERial:PACE? Query ................................................................................... B-20
B.80 SYSTem:ERRor? Query......................................................................................................................... B-21
B.81 SYSTem:ERRor:CODE? Query ............................................................................................................. B-21
B.82 SYSTem:ERRor:CODE:ALL? Query ...................................................................................................... B-21
B.83 SYSTem:PASSword:CENable Command .............................................................................................. B-21
B.84 SYSTem:PASSword:CDISable Command ............................................................................................. B-21
B.85 SYSTem:PASSword:NEW Command .................................................................................................... B-21
B.86 SYSTem:PASSword:STATe? Query ...................................................................................................... B-21
B.87 SYSTem:REMote Command ................................................................................................................ B-21
B.88 SYSTem:REMote? Query....................................................................................................................... B-21
B.89 SYSTem:SECurity:IMMediate Command............................................................................................... B-22
B.90 SYSTem:SET Command........................................................................................................................ B-23
B.91 SYSTem:SET? Query............................................................................................................................. B-23
B.92 SYSTem:VERSion? Query ..................................................................................................................... B-23

LIST OF FIGURES
FIGURE TITLE PAGE
BIT 4886051010 v
1-1 Remotely Controlled Power Supply Configurations Using Kepco Products................................................ viii
2-1 BIT 4886 Switch Locations ......................................................................................................................... 2-2
2-2 Installation of Model BIT 4886 into BOP ..................................................................................................... 2-5
2-3 IEEE 488 (GPIB) Connector ....................................................................................................................... 2-6
2-4 RJ45 to DB9 Adapter Wiring ....................................................................................................................... 2-7
3-1 BOP Power Supply, Internal Calibration Control Locations ........................................................................ 3-2
3-2 Current Shunt Connections......................................................................................................................... 3-2
3-3 Main Panel .................................................................................................................................................. 3-9
3-4 Calibration Panel......................................................................................................................................... 3-10
4-1 Programming Example to Verify Previous Command has Completed........................................................ 4-2
4-2 VISA Driver Start-up ................................................................................................................................... 4-4
4-3 BIT 4886 Card Initialization using VISA Driver............................................................................................ 4-4
4-4 RS 232 Implementation .............................................................................................................................. 4-10
4-5 Tree Diagram of SCPI Commands Used with BIT 4886 Interface Card ..................................................... 4-13
4-6 Message Structure ...................................................................................................................................... 4-16
4-7 Typical Example of Interface Card Program Using SCPI Commands ........................................................ 4-20
A-1 GPIB Commands ....................................................................................................................................... A-3
B-1 Using Calibration Commands and Queries................................................................................................ B-3
B-2 Using LIST Commands for Sawtooth and Triangle Waveforms................................................................. B-9
B-3 Using LIST Commands and Queries ......................................................................................................... B-10
B-4 Programming the Output............................................................................................................................ B-14
B-5 Using Recall and Trigger Functions ........................................................................................................... B-16
B-6 Using Status Commands and Queries....................................................................................................... B-19
B-7 Setting the Unit to Remote Mode via Serial (RS 232) Port ........................................................................ B-22
B-8 Using System Commands and Queries..................................................................................................... B-23

vi BIT 4886051010
LIST OF TABLES
TABLE TITLE PAGE
1-1 Applicability of BIT 4886 Cards to Specific BOP Models ........................................................................... 1-1
1-2 BOP Voltage Specifications with BIT 4886 Installed .................................................................................. 1-2
1-3 BOP Current Specifications with BIT 4886 Installed .................................................................................. 1-2
1-4 Specifications, BIT 4886 ............................................................................................................................. 1-3
1-5 Command Differences for BIT 4886 card Configured as BIT 4882 ............................................................ 1-4
2-1 Items Supplied ............................................................................................................................................ 2-1
2-2 Device Address Selection .......................................................................................................................... 2-3
2-3 Input/Output Pin Assignments .................................................................................................................... 2-6
2-4 RS232C PORT Input/Output Pin Assignments .......................................................................................... 2-7
2-5 RJ45 to DB9 Adapter Wire Functions ........................................................................................................ 2-7
3-1 Calibration Measurements and Tolerances - Voltage ................................................................................ 3-3
3-2 Calibration Measurements and Tolerances - Current ................................................................................ 3-4
3-3 Suggested Sense Resistors ....................................................................................................................... 3-5
3-4 Calibration Panel Functions ....................................................................................................................... 3-10
4-1 Built-in test Error Codes ............................................................................................................................. 4-6
4-2 IEEE 488 (GPIB) Bus Interface Functions ................................................................................................. 4-7
4-3 IEEE 488 (GPIB) Bus Command Mode Messages .................................................................................... 4-8
4-4 IEEE 488 (GPIB) Bus Data Mode Messages ............................................................................................. 4-9
4-5 Enhanced Operation - Error Response ...................................................................................................... 4-22
4-6 Calibration Storage ..................................................................................................................................... 4-25
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-5
B-1 SCPI Subsystem Command/query Index ...................................................................................................B-1
B-2 List Data Table ...........................................................................................................................................B-7
B-3 List Sequence Table ...................................................................................................................................B-12
B-4 Operation Condition Register, Operation Enable Register,
and Operation Event Register Bits ..........................................................................................................B-18
B-5 Questionable Event Register, Questionable Condition Register
and Questionable Condition Enable Register Bits ...................................................................................B-19
B-6 Error Messages ..........................................................................................................................................B-22

(vii Blank)/viii BIT4886 051010
FIGURE 1-1. REMOTELY CONTROLLED POWER SUPPLY CONFIGURATIONS USING KEPCO PRODUCTS

BIT 4886 OPR 051010 1-1
SECTION 1 - INTRODUCTION
1.1 SCOPE OF MANUAL
This manual contains instructions for the installation, operation and maintenance of the BIT
4886 Interface Card manufactured by Kepco, Inc, Flushing, NY, U.S.A.
1.2 GENERAL DESCRIPTION
The Kepco BIT Card Series were designed as an accessory for the Kepco BOP series bipolar
power supplies. The BIT 4886 card makes it possible to control the BOP output by means of
digital input signals via the IEEE 488.2 bus using SCPI commands (see Figure 1-1). The BIT
4886 card acts as an interface between the digital data bus and the BOP, accepting the digital
input data and converting it to an analog signal, which in turn, controls the BOP output. The BIT
4886 provides full talk/listen capability and is fully compliant with the SCPI programming lan-
guage.
At power-up the BIT 4886 is set to local mode, allowing front panel control of the BOP power
Supply. Upon power up the BIT 4886 performs a reset, establishing the voltage and current out-
put levels to be 0 volts and the output state to be off.
The BIT 4886 is a 16-bit interface card which allows either plus or minus voltage or current out-
put at 15 bits of resolution.
Table 1-1 shows which specific revisions of BOP models are compatible with BIT 4886 cards.
1.2.1 MEASUREMENTS
The readback information for BIT 4886 cards is the average of the last 16 measurements. The
measurement average is valid after a time delay which allows the readings to stabilize, plus 320
milliseconds. Issuing a MEAS:VOLT? query before the end of this time delay will retrieve the
instantaneous measured voltage from the analog-to-digital converter. After the delay, the mea-
surement returned is the average of the last 16 measurements of the analog-to-digital convert-
ers.
TABLE 1-1. APPLICABILITY OF BIT 4886 CARDS TO SPECIFIC BOP MODELS
MODEL REVISION NO. MODEL REVISION NO.
BOP 20-5M 2 AND LATER BOP 50-8M 10 AND LATER
BOP 20-10M 17 AND LATER BOP 72 3M 10 AND LATER
BOP 20-20M 15 AND LATER BOP 72-6M 14 AND LATER
BOP 36-6M 19 AND LATER BOP 100-1M 24 AND LATER
BOP 36-12M 13 AND LATER BOP 100-2M 15 AND LATER
BOP 50-2M 21 AND LATER BOP 100-4M 14 AND LATER
BOP 50-4M 13 AND LATER BOP 200-1M 7 AND LATER
NOTE: For modification (to accept the BIT 4886 card) of BOP Models with revision numbers that
do not appear in this table, contact Kepco for assistance.

1-2 BIT 4886 OPR 051010
1.2.2 ENHANCED OPERATION
The BIT 4886 card includes the following enhanced operation features: a) advanced control
over the way the unit responds to errors (PAR. 4.7.1), b) advanced limit channel control for
applications such as battery, photocell, and large inductor applications (see PAR. 4.7.2) and c)
ability to save system settings (PAR. 4.7.3).
1.3 SPECIFICATIONS
For voltage and current accuracy specifications of BOP Models with a BIT 4886 card installed,
refer to Tables 1-2 and 1-3, respectively. Table 1-4 lists the specifications for the BIT 4886 card.
TABLE 1-2. BOP VOLTAGE SPECIFICATIONS WITH BIT 4886 INSTALLED
VOLTAGE
SPECIFICATION BOP 200-1
BOP 100-1M
BOP 100-2M
BOP 100-4M
BOP 72-3M
BOP 72-6M
BOP 50-2M
BOP50-4M
BOP 50-8M
BOP 36-6M
BOP 36-12
BOP 20-5M
BOP20-10M
BOP20-20M
High range accuracy 24mV 12mV 8mV 6mV 4mV 2.4mV
Low Range Accuracy 6mV 3mV 2mV 1.5mV 1mV 0.6mV
Positive Limit Accuracy 300mV 150mV 100mV 90mV 75mV 36mV
Measurement Accuracy 120mV 60mV 45mV 30mV 24mV 12mV
NOTE: Low range is defined as less than 1/4 of the rated value.
TABLE 1-3. BOP CURRENT SPECIFICATIONS WITH BIT 4886 INSTALLED
CURRENT
SPECIFICATION
BOP MODEL (ARRANGED BY CURRENT CAPABILITY)
20-20M 36-12M 20-10M 50-8M 36-6M
72-6M 20-5M 50-4M
100-4M 72-3M 50-2M
100-2M
100-1M
200-1M
High range accuracy 20mA 6mA 5mA 4mA 1.2mA 1mA 0.5mA 0.36mA 0.25mA 0.12mA
Low Range Accuracy 1.6mA 0.5mA 0.3mA 0.25mA 0.2mA 0.15mA 0.12mA 0.08mA 0.06mA 0.03mA
Positive Limit Accuracy 40mA 28mA 24mA 20mA 6mA 5mA 8mA 3mA 2mA 1mA
Measurement Accuracy 20mA 14mA 12mA 5mA 3mA 2.5mA 2mA 1.5mA 1mA 0.5mA
NOTES:1. Low range is defined as less than 1/4 of the rated value
2. Accuracy specifications apply only after 1 minute warm-up.

BIT 4886 OPR 051010 1-3
TABLE 1-4. SPECIFICATIONS, BIT 4886
SPECIFICATION DESCRIPTION
OUTPUT VOLTAGE
(MAIN CHANNEL)
High Range Programs BOP to rated value
Low Range Programs BOP to 1/4 rated value
Rise and Fall times (VOLT:MIN to
VOLT:MAX)
<100 microseconds
LIMIT CHANNEL ACCURACY 0.5%
TEMPERATURE COEFFICIENT
Full scale: ± 35 ppm/°C max
Zero:
High Range ±10 ppm/°C max
Low Range ±30 ppm/ °C max
Voltage Readback:
High Range ± 20µV/ °C max
Low Range ± 10µV/ °C max
Current Readback: ±10 ppm/°C max
OPTICAL ISOLATION Digital and Analog grounds can be separated by a maximum of 500
Volts.
DIGITAL INPUT FORMAT Byte-Serial/IEEE
POWER REQUIREMENT Supplied by host power supply
RESOLUTION PROGRAMMING 15 bits
READBACK 15 bits
LINEARITY PROGRAMMING ± 1 LSB
READBACK ± 2 LSBs
PROGRAMMING
ACCURACY
(% OF MAX. OUTPUT) CAPABILITY
VOLTAGE HIGH RANGE 0.01% of EoMAX 15 Bits
VOLTAGE LOW RANGE 0.01% of 1/4 EoMAX 15 Bits
CURRENT HIGH RANGE 0.015% of IoMAX (See Note 1.) 15 Bits
CURRENT LOW RANGE 0.01% of IoMAX 15 Bits
LIMIT CHANNEL 0.5% (See Note 2.) 12 Bits
DATA READBACK
ACCURACY
VOLTAGE 0.05% % of Max. Voltage
or Current
CURRENT
LIST
STEP RANGE 500 microseconds to 10 seconds
STEP ACCURACY –5 TO +20 microseconds (See Note 3.)
NUMBER OF STEPS 1002
RISE/FALL TIME >100 microseconds
TRANSIENT
TRANSIENT RANGE 500 microseconds to 10 seconds
TRANSIENT ACCURACY –20 TO +1200 microseconds (See Note 3.)
RISE/FALL TIME >100 microseconds
ENVIRONMENTAL
SPECIFICATIONS
OPERATING TEMP. 0 to 50° C
STORAGE TEMP. –20 to +85° C
NOTES: 1. The current control specification (stability) of BOP power supplies is not altered or improved by the addition of a BIT 4886
card. The current stability of the BIT 4886 card with most BOPs will be 0.015%. However, Some BOP models have better
control specifications, e.g., the BOP 20-5 (0.006% stability), and others have lower stability such as the BOP 100-4
(0.02%), BOP 50-4 (0.05%) and BOP 20-20 (0.1%). All stability measurements are after warm-up time of 5 minutes.
2. For all BOP models (except 200-1) with BIT 4886 card installed typical voltage mode ripple/noise = 4mV rms, max noise =
6mV rms and 60mV p-p. For BOP 200-1 models typical voltage mode ripple/noise = 4mV rms, maximum voltage mode rip-
ple/noise = 8mV rms and 80mV p-p.
3. Accuracy is affected by GPIB and RS-232 communications. To attain these accuracies only the Serial poll command of the
GPIB interface should be used while executing a transient or list.

1-4 BIT 4886 OPR 051010
1.3.1 BIT 4882 COMPATIBILITY
The BIT 4886 card complies with the SCPI 1997 standard as a member of the power supply
instrument class. The Bit 4882 product complies with the 1990 version of the SCPI standard.
During the years of 1990 to 1997, the SCPI consortium refined the standard, providing direction
for the *RST command and indicating the differences between *RST and the single byte GPIB
command of DCL and SDC. The BIT 4886 card when shipped by KEPCO, is not compatible
with user software developed for the BIT 4882. The user can make it more compatible by using
the SYST:SET command to reconfigure the operation of DCL, *RST and the sending of data to
the host computer. Appendix B, Figure B-8, illustrates the use of the SYST:SET command to
change the BIT 4886 to operate like the BIT 4882, except for some minor differences that will
remain for some 4882 command sequences (see Table 1-5).
TABLE 1-5. COMMAND DIFFERENCES FOR BIT 4886 CARD CONFIGURED AS BIT 4882
Command BIT Card Behavior
BIT 4882 BIT 4886 configured as BIT 4882
VOLT?MAX Returns 100 No action - error 113
VOLT? MIN Returns 0 Returns -Eomax (e.g.for BOP 100-1 returns -100)
VOLT10 Set output = 10V No action - error 113
OUTP OFF;VOLT 10;OUTP ON Set output = 0 Set output = 10 volts

BIT 4886 051010 2-1
SECTION 2 - INSTALLATION
2.1 UNPACKING AND INSPECTION
The Interface Card has been thoroughly inspected and tested prior to packing and is ready for
operation following installation. Unpack, saving original packing material. If any indication of
damage is found, file a claim immediately with the responsible transport service. See Table 2-1
for items supplied.
2.2 SET START-UP DEFAULTS (SEE FIGURE 2-1)
The start-up default, consisting of the Device Address (GPIB address) is initially set by means of
DIP switches as described in PAR. 2.2.1. The default power supply identification is described in
PAR. 2.2.2.
TABLE 2-1. ITEMS SUPPLIED
ITEM KEPCO PART NUMBER QUANTITY
PCB Assembly 236-1836 1
Cable #1 241-0889 1
Cable #2 241-0899 1
Knurled Nut
(6-32 x 3/4 DIA. BR., THUMB) 102-0023 3
Washers
(#6 EXT. LOCK, STEEL) 103-0046 3
Label, Address 188-1726 1
Label, Control Identification 188-1826 1
Bracket 128-1810 1
Connector (see NOTE) 142-0506 1
Cable (see NOTE) 118-1164 1
NOTE: Item not required for installation; used to connect RS 232 port to an external
computer.

2-2 BIT 4886 051010
2.2.1 SET (GPIB) DEVICE ADDRESS (SEE FIGURE 2-1)
The Device Address for the interface card is set by means of DIP switch S1, positions 1 through
5 (Figure 2-1). The Device Address is the permanent Listener or Talker address of the interface
card on the GPIB. It is factory preset to address 6. If a different Device Address is required in
your system, proceed as follows. There are 31 (1-31) possible choices (See Table 2-2).
1. Position the Interface Card as depicted in Figure 2-1.
2. The Device Address DIP switches are positions 1 through 5 (from right to left, Figure 2-1).
These switches are preset by Kepco to address 6. For other device addresses set them
according to Table 2-2.
2.2.2 POWER SUPPLY IDENTIFICATION
The BIT 4886 interface card is factory set to report power supply voltage as 200 Volts and cur-
rent as 20 Amperes. The interface card has nonvolatile random access memory which is used
to store these values. A special GPIB command of DIAG:PST is used to set the voltage and cur-
rent of the power supply which has the BIT 4886 card installed. Other commands can be used
to establish other operating characteristics such as the language and DCL operation. See
Appendix B and PAR. 4.2 for detailed procedures and instructions.
FIGURE 2-1. BIT 4886 SWITCH LOCATIONS

BIT 4886 051010 2-3
TABLE 2-2. DEVICE ADDRESS SELECTION
DECIMAL
ADDRESS
SELECTOR SWITCH S1 SECTION
(SIGNAL LINE)
A5 A4 A3 A2 A1
100001
200010
300011
400100
500101
600110
700111
801000
901001
1001010
1101011
1201100
1301101
1401110
1501111
1610000
1710001
1810010
1910011
2010100
2110101
2210110
2310111
2411000
2511001
2611010
2711011
2811100
2911101
3011110
3111111
NOTE: 0 = CLOSED (ON) (Towards printed circuit board)
1 = OPEN (OFF) (Away from printed circuit board)

2-4 BIT 4886 051010
2.3 INSTALLATION OF INTERFACE CARD INTO THE BOP
Refer to Figure 2-2 to install the BIT 4886 interface card.
CAUTION: The BIT 4886 card contains ESD sensitive components. Follow all proce-
dures in effect at your facility for handling ESD sensitive components.
NOTE: Step numbers coincide with encircled numbers on Figure 2-2.
Step 1. Remove a-c power to BOP by disconnecting line cord.
Step 2. Remove BOP cover (see Section 5, Figure 5-1 of your BOP Instruction Manual).
Step 3. Remove and discard Rear Cover Plate (PN 128-1566) and associated hardware.
Step 4. Remove J204 Connector Assembly (PN 241-0680) from Location #1, save for Step 8.
Step 5. Locate Transformer T202 and unplug connector from Location #4 only.
Step 6. Locate Rear Bracket and note part number (stamped on outside left edge):
if PN 128-1810 proceed to Step 7.
if not PN 128-1810, stop installation. Unit does not meet minimum requirements;
contact Kepco for assistance.
Step 7. Unpack the BIT 4886 Interface Card Installation Components (PCB Assembly, Cables
#1 and #2, Connector Assembly, three (3) Knurled Nuts, five (5) washers, Spacer and
Bracket).
Step 8. Install BIT 4886 Interface Card into the guides, slide into position so that mounting
holes in PCB Assembly line up with the two mounting posts on the BOP mounting
bracket.
Step 9. Secure the BIT 4886 Interface Card to the Mounting Posts using the Knurled Nuts and
Lockwashers. Mount Connector J204 (Ref. Step 4, above) into Location #3 using the
Lockwashers, Hex Spacer and knurled nut.
Step 10. Install Cable #1 (18-position connectors) to the BIT 4886 Interface Card, mate the
other end of the cable with Location #1 on BOP A1 Assembly.
Step 11. Install Cable #2 (5-position connectors) to the BIT 4886 Interface Card, mate the other
end of the cable with Location #2 on BOP A1 Assembly.
Step 12. Plug in 3-pin Connector from Transformer 100-2354 (removed in step 5) into BIT 4886
Card, Location #5.
Step 13. Mark “-4886” after Model No. on Nameplate (see Detail A).
Step 14. On BOP cover, peel off “Address Label” (PN 188-1012). Affix revised “Address Label”
(PN 188-1726) in vacated position (with part number facing front panel).
Step 15. Initialize the GPIB per PAR. 4.2, then proceed to step 16.
Step 16. Perform calibration procedure detailed in Section 3 of this manual.
Step 17. Reinstall BOP cover.

BIT 4886 051010 2-5
FIGURE 2-2. INSTALLATION OF MODEL BIT 4886 INTO BOP

2-6 BIT 4886 051010
2.4 INPUT/OUTPUT SIGNALS
The IEEE 488 port is a 24 pin IEEE 488 connector (Figure 2-3) and conforms mechanically and
electrically to the IEEE 488 standard; refer to Table 2-3 for pin assignments. Table 2-4 describes
the RS 232 port pin connections.
FIGURE 2-3. IEEE 488 (GPIB) CONNECTOR
TABLE 2-3. INPUT/OUTPUT PIN ASSIGNMENTS
PIN SIGNAL NAME FUNCTION
1DI01 I/O Line
2DI02 I/O Line
3DI03 I/O Line
4DI04 I/O Line
5 EOI End or Identify
6 DAV Data Valid
7 NRFD Not Ready for Data
8 NDAC Not Data Accepted
9 IFC Interface Clear
10 SRQ Service Request
11 ATN Attention
12 SHIELD Shield
13 DI05 I/O Line
14 DI06 I/O Line
15 DI07 I/O Line
16 DI08 I/O Line
17 REN Remote Enable
18 GND Ground (signal common)
19 GND Ground (signal common)
20 GND Ground (signal common)
21 GND Ground (signal common)
22 GND Ground (signal common)
23 GND Ground (signal common)
24 LOGIC GND Logic Ground