KEPCO BIT 232F User Manual
OPERATOR’S MANUAL
KEPCO INC.
BIT 232, BIT 232-F
DIGITAL INTERFACE CARD
MODEL
BIT 232, BIT 232-F
INTERFACE CARD
ORDER NO. REV. NO.
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 numbers. 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 Documentation Office in New York, (718) 461-7000, requesting the correct
revision for your particular 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®
©1995, KEPCO, INC
P/N 243-0877
KEPCO, INC. 131-38 SANFORD AVENUE FLUSHING, NY. 11352 U.S.A. TEL (718) 461-7000 FAX (718) 767-1102
THE POWER SUPPLIER™
TABLE OF CONTENTS
SECTION PAGE
SECTION 1 - INTRODUCTION
1.1 Scope of Manual ..................................................................................................................................... 1-1
1.2 General Description................................................................................................................................. 1-1
1.3 Specifications, BIT 232/BIT 232-F........................................................................................................... 1-1
1.4 Accessories ............................................................................................................................................. 1-1
SECTION 2 - INSTALLATION
2.1 Unpacking and Inspection ....................................................................................................................... 2-1
2.2 Set Start-up DefaultS .............................................................................................................................. 2-1
2.2.1 Start-up Language Default................................................................................................................. 2-1
2.2.2 Set Power Supply Identification Switch ............................................................................................. 2-1
2.3 Installation of BIT Card into the BOP ...................................................................................................... 2-1
2.4 Input/OUtput Signals ............................................................................................................................... 2-5
2.5 RS 232 Connections ............................................................................................................................... 2-5
SECTION 3 - CALIBRATION
3.1 Equipment Required................................................................................................................................ 3-1
3.2 Adjustment of the Bop ±10 Volt Calibration Controls (R31, R32)............................................................ 3-1
3.3 Adjustment of the Ammeter Zero (R50) .................................................................................................. 3-1
3.4 Adjustment Of The Output Voltage Zero (R81)....................................................................................... 3-2
3.5 Adjustment of the Full Scale Output Voltage (R21)................................................................................. 3-2
3.6 Voltage Reading Zero Calibration (R35) ................................................................................................. 3-3
3.7 Voltage Reading Calibration (R19).......................................................................................................... 3-3
3.8 Adjustment of the Output Current Zero (R83) ......................................................................................... 3-4
3.9 Adjustment of the Full Scale Output Current (R22)................................................................................. 3-4
3.10 Current Reading Zero Calibration (R36).................................................................................................. 3-4
3.11 Current Reading Calibration (R20).......................................................................................................... 3-5
SECTION 4 - OPERATION
4.1 General.................................................................................................................................................... 4-1
4.2 RS232-C Bus Protocol ............................................................................................................................ 4-1
4.3 RS232 Implementation............................................................................................................................ 4-1
4.4 SCPI Programming ................................................................................................................................. 4-2
4.4.1 SCPI Messages ................................................................................................................................. 4-2
4.4.2 Common Commands/Queries ........................................................................................................... 4-2
4.4.3 SCPI Subsystem Command/Query Structure.................................................................................... 4-2
4.4.4 Program Message Structure.............................................................................................................. 4-3
4.4.4.1 Keyword....................................................................................................................................... 4-3
4.4.4.2 Keyword Separator ...................................................................................................................... 4-5
4.4.4.3 Query Indicator ............................................................................................................................ 4-5
4.4.4.4 Data ............................................................................................................................................. 4-6
4.4.4.5 Data Separator............................................................................................................................. 4-6
4.4.4.6 Message Unit Separator .............................................................................................................. 4-6
4.4.4.7 Root Specifier .............................................................................................................................. 4-6
4.4.4.8 Message Terminator.................................................................................................................... 4-6
4.4.5 Understanding The Command Structure........................................................................................... 4-6
4.4.6 Program Message Syntax Summary................................................................................................. 4-7
4.5 CIIL Programming ................................................................................................................................... 4-8
4.6 Programming Examples.......................................................................................................................... 4-8
BIT 232 022800
i
TABLE OF CONTENTS
SECTION PAGE
APPENDIX A - SCPI COMMON COMMAND/QUERY DEFINITIONS
A.1 Introduction ..............................................................................................................................................A-1
APPENDIX B - SCPI COMMAND/QUERY DEFINITIONS
B.1 Introduction ..............................................................................................................................................B-1
APPENDIX C - CIIL COMMAND DEFINITIONS
C.1 Introduction ..............................................................................................................................................C-1
APPENDIX D - TERMINAL EMULATION PROGRAM
D.1 Introduction ..............................................................................................................................................D-1
APPENDIX E - RS232 COMMAND LOOP PROGRAM
E.1 Introduction ..............................................................................................................................................E-1
APPENDIX F - C LANGUAGE FUNCTIONS
F.1 Introduction .............................................................................................................................................. F-1
F.2 Open Serial Port Using ROM BIOS Routine ............................................................................................F-1
F.3 Put Character to Serial Port .....................................................................................................................F-1
F.4 Send, Wait for Echo .................................................................................................................................F-2
F.5 Get Character from Serial Port ................................................................................................................ F-2
F.6 Check to See If a Character Was Received ............................................................................................ F-3
F.7 Send Command .......................................................................................................................................F-3
F.8 Send Command and Wait Until Ready .................................................................................................... F-4
APPENDIX G - BASIC LANGUAGE TERMINAL EMULATION
G.1 Introduction ............................................................................................................................................. G-1
ii
BIT 232 022800
LIST OF FIGURES
FIGURE TITLE PAGE
1-1 Remotely Controlled Power Supply Configurations Using Kepco Products............................................... vi
2-1 Installation of BIT Card into BOP ................................................................................................................ 2-2
2-2 BIT 232/BIT 232-F Switch and Adjustment Locations ................................................................................ 2-4
2-3 RS 232C Connector.................................................................................................................................... 2-5
3-1 BOP Power Supply, Internal Calibration Control Locations........................................................................ 3-2
3-2 Current Shunt Connections......................................................................................................................... 3-5
4-1 Tree Diagram of SCPI Commands Used with BIT 232/BIT 232-F Interface Card ...................................... 4-3
4-2 Message Structure...................................................................................................................................... 4-5
A-1 *CLS — Clear Status Command.............................................................................................................. A-1
A-2 *ESE — Standard Event Status Enable Command ................................................................................... A-2
A-3 *ESE? — Standard Event Status Enable Query........................................................................................ A-2
A-4 *ESR? — Event Status Register Query .................................................................................................... A-3
A-5 *IDN? — Identification Query ..................................................................................................................... A-3
A-6 *OPC — Operation Complete Command................................................................................................... A-4
A-7 *OPC? — Operation Complete Query ....................................................................................................... A-4
A-8 *RST — Reset Command.......................................................................................................................... A-5
A-9 *SRE — Service Request Enable Command............................................................................................. A-6
A-10 *SRE? — Service Request Enable Query ................................................................................................. A-6
A-11 *STB? — Status Byte Register Query ....................................................................................................... A-7
A-12 *TRG — Trigger Command ....................................................................................................................... A-7
A-13 *TST? — Self Test Query .......................................................................................................................... A-8
A-14 *WAI — Wait-to-continue Command.......................................................................................................... A-8
B-1 INITiate[:IMMediate] Command ................................................................................................................. B-1
B-2 INITiate:CONTinuous Command ............................................................................................................... B-2
B-3 INITiate:CONTinuous Query ...................................................................................................................... B-2
B-4 MEASure:CURRent? and MEASure:VOLTage? Queries........................................................................... B-3
B-5 CURRent Command .................................................................................................................................. B-4
B-6 CURRent Query......................................................................................................................................... B-4
B-7 CURRent:TRIGgered Command ............................................................................................................... B-5
B-8 CURRent:TRIGgered Query ...................................................................................................................... B-5
B-9 VOLTage Command ................................................................................................................................... B-6
B-10 VOLTage Query.......................................................................................................................................... B-6
B-11 VOLTage:TRIGgered Command ................................................................................................................ B-7
B-12 VOLTage:TRIGgered Query ....................................................................................................................... B-7
B-13 FUNCtion:MODE Command...................................................................................................................... B-8
B-14 STATus:OPERation:CONDition Query....................................................................................................... B-8
B-15 STATus:OPEReration:ENABle Command.................................................................................................. B-9
B-16 STATus:OPEReration:ENABle Query ........................................................................................................ B-9
B-17 STATus:OPERation QUERY ...................................................................................................................... B-10
B-18 STATus:PRESet Command........................................................................................................................ B-10
B-19 STATus:QUEStionable? Query .................................................................................................................. B-11
B-20 STATus:QUEStionable:CONDition? Query ................................................................................................ B-11
B-21 STATus:QUEStionable:ENABle Command................................................................................................ B-12
B-22 STATus:QUEStionable:ENABle? Query..................................................................................................... B-12
B-23 SYSTem:ERRor? Query............................................................................................................................. B-13
B-24 SYSTem:LANGuage Command................................................................................................................. B-13
C-1 FNC — Function Command....................................................................................................................... C-1
C-2 INX — Initiate Op Code Command ............................................................................................................ C-2
C-3 FTH — Fetch Command............................................................................................................................ C-2
C-4 SET Command .......................................................................................................................................... C-3
C-5 RST — Reset Command ........................................................................................................................... C-4
C-6 CNF, IST — Confidence Test, Internal Self Test Commands.................................................................... C-4
C-7 STA — Status Command........................................................................................................................... C-5
C-8 GAL — Go to Alternate Language Command .......................................................................................... C-6
BIT 232 022800
iii/iv Blank)
LIST OF TABLES
TABLE TITLE PAGE
1-1 Kepco BIT 232, 488 and 4882 Digital Programming Cards ........................................................................1-1
1-2 Applicability of BIT Interface Cards to Specific BOP Models ......................................................................1-2
1-3 Specifications, BIT 232 and BIT 232-F .......................................................................................................1-2
2-1 Power Supply Identification Switch S2 Setting ...........................................................................................2-4
2-2 Input/Output Pin Assignments ....................................................................................................................2-5
3-1 BOP Power Supply, Internal Calibration Controls .......................................................................................3-3
4-1 SCPI Command Index ................................................................................................................................4-4
4-2 Rules Governing Shortform Keywords ........................................................................................................4-4
A-1 SCPI Common Command/query Index ...................................................................................................... A-1
B-1 SCPI Subsystem Command/query Index .................................................................................................. B-1
C-1 CIIL Subsystem Command/query Index .................................................................................................... C-1
C-2 CIIL Error Messages ..................................................................................................................................C-5
C-3 CIIL Error Handling Utility Commands .......................................................................................................C-6
D-1 ROM BIOS Routines to be replaced with equivalent for non-IBM-PC-compatible PC’s ............................ D-1
E-1 ROM BIOS Routines to be replaced with equivalent for non-IBM-PC-compatible PC’s ............................ E-1
BIT 232 022800
v
FIGURE 1-1. REMOTELY CONTROLLED POWER SUPPLY CONFIGURATIONS USING KEPCO PRODUCTS
vi
BIT 232 022800
SECTION 1 - INTRODUCTION
1.1 SCOPE OF MANUAL
This manual contains instructions for the installation, operation and maintenance of the BIT
232 and BIT 232-F Interface Cards manufactured by Kepco, Inc., Flushing, NY, U.S.A. References to “BIT Card” refer to both models.
1.2 GENERAL DESCRIPTION
The Kepco BIT Card Series were designed as an accessory for the Kepco BOP series bipolar
power supplies. The BIT cards make it possible to control the BOP output by means of digital
input signals (see Figure 1-1). The BIT 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 232 provides RS232 communication capability. It is
fully compliant with SCPI and CIIL high level programming languages.
The BIT design group consists of five models. Field installable interface cards carry the prefix
“BIT”. BOP bipolar power supplies with an installed BIT card carry the suffixes shown in Table
1-1.
TABLE 1-1. KEPCO BIT 232, 488 AND 4882 DIGITAL PROGRAMMING CARDS
FIELD INSTALLABLE
PROGRAMMING
CARD MODEL
BIT 232 (See Table 1-2)
BIT 232-F (See Table 1-2)
BIT 488-B -488-B BYTE-SERIAL
BIT 488-D -488-D BYTE-SERIAL
BIT 4882 (See Table 1-2)
BIT 4882-F (See Table 1-2)
BIT TMA-27 -TMA 2-WIRE-SERIAL
FACTORY
INSTALLED
PROGRAMMING
CARD BOP SUFFIX
-232
-4882 BYTE-SERIAL
INPUT CODING
SERIAL:
8 DATA BITS,
NO PARITY BIT
1 STOP BIT
MAIN
CHANNEL
12 BITS
(BINARY)
3-DIGIT
(BCD)
12 BITS
(BINARY)
12 BITS
(BINARY)
Except for the installation procedures, the BIT 232 and 232-F cards are identical. The BIT
232F includes a replacement transformer needed to modify earlier BOP Models indicated in
Table 1-2.
1.3 SPECIFICATIONS, BIT 232/BIT 232-F (SEE TABLE 1-3)
RESOLUTION
LIMIT
CHANNEL
––
8 BITS
(BINARY)
2-DIGIT
(BCD)
12 BITS
(BINARY)
12 BITS
(BINARY)
RS 232-C BUS
OR GPIB BUS
CONTROL BUS
REMARKS
FOR THE
FOR THE
IEEE-488
KEPCO
Refer to Table 1-3 for BIT 232/BIT 232-F specifications.
1.4 ACCESSORIES
The sample programs illustrated in Appendices E through G are available on 3.5 in. diskette,
Kepco P/N 254-0019.
BIT 232 OPR 022800
1-1
TABLE 1-2. APPLICABILITY OF BIT INTERFACE CARDS TO SPECIFIC BOP MODELS
BOP TO BE MODIFIED
MODEL REVISION NO. MODEL REVISION NO.
1 BIT 232-F, BIT 4882-F
20-5M
2 AND LATER BIT 232, BIT 4882 10 AND LATER BIT 232, BIT 4882
12 TO 16 BIT 232-F, BIT 4882-F
20-10M
17 AND LATER BIT 232, BIT 4882 10 AND LATER BIT 232, BIT 4882
8 TO 14 BIT 232-F, BIT 4882-F
20-20M
15 AND LATER BIT 232, BIT 4882 14 AND LATER BIT 232, BIT 4882
12 TO 18 BIT 232-F, BIT 4882-F
36-6M
19 AND LATER BIT 232, BIT 4882 24 AND LATER BIT 232, BIT 4882
7 TO 12 BIT 232-F, BIT 4882-F
36-12M
13 AND LATER BIT 232, BIT 4882 15 AND LATER BIT 232, BIT 4882
16 TO 20 BIT 232-F, BIT 4882-F
50-2M
21 AND LATER BIT 232, BIT 4882 14 AND LATER BIT 232, BIT 4882
6 TO 12 BIT 232-F, BIT 4882-F
50-4M
13 AND LATER BIT 232, BIT 4882 7 AND LATER BIT 232, BIT 4882
NOTE: For modification of BOP Models with revision numbers that do not appear in this table, contact Kepco for assistance.
APPLICABLE
CARD
BOP TO BE MODIFIED
4 TO 9 BIT 232-F, BIT 4882-F
50-8M
5 TO 9 BIT 232-F, BIT 4882-F
72-3M
7 TO 13 BIT 232-F, BIT 4882-F
72-6M
17 TO 23 BIT 232-F, BIT 4882-F
100-1M
10 TO 14 BIT 232-F, BIT 4882-F
100-2M
6 TO 13 BIT 232-F, BIT 4882-F
100-4M
6 AND EARLIER BIT 232-F, BIT 4882-F
200-1M
APPLICABLE
CARD
TABLE 1-3. SPECIFICATIONS, BIT 232 AND BIT 232-F
SPECIFICATION DESCRIPTION
OUTPUT VOLTAGE (MAIN CHANNEL) 0 ± 10V
OUTPUT VOLTAGE (LIMIT CHANNEL) 0 to +10V
OUTPUT CURRENT (EACH CHANNEL) 0 to ± 2 mA max.
OUTPUT IMPEDANCE <0.05 ohms
TEMPERATURE COEFFICIENT
OPTICAL ISOLATION
DIGITAL INPUT FORMAT Serial, 8 data bits, no parity, 1 stop
POWER REQUIREMENT Supplied by BOP
PRGRAMMING RESOLUTION
DATA READBACK ACCURACY
VOLTAGE
CURRENT
VOLTAGE
CURRENT of Max. Current
Full scale: ± 35 ppm/ °C max
Zero: ± 20µV/°C max
Digital and Analog grounds can be separated
by a maximum of 500 Volts.
RATING/DESCRIPTION CONDITION
0.024% 12 Bits
0.2%
of Max. Voltage
1-2
BIT 232 SVC 022800
SECTION 2 - INSTALLATION
2.1 UNPACKING AND INSPECTION
The BIT 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.
2.2 SET START-UP DEFAULTS (SEE FIGURE 2-2)
Start-up defaults, consisting of Start-up Language and Power Supply Identification are initially
set by means of DIP switches as described in the following paragraphs.
2.2.1 START-UP LANGUAGE DEFAULT (SEE FIGURE 2-2)
DIP switch S1 position 6 sets the Start-up Language Default:
• OFF (0) = SCPI (factory default)
• ON (1) = CIIL
2.2.2 SET POWER SUPPLY IDENTIFICATION SWITCH (SEE FIGURE 2-2)
Power Supply Identification switch S2 (Figure 2-2) identifies the BOP model to be controlled by
the BIT Card. Set Switch S2 positions 1 through 6 in accordance with Table 2-1.
2.3 INSTALLATION OF BIT CARD INTO THE BOP
Refer to Figure 2-1 to install the BIT 232-F BIT Card.
BIT 232 022800
2-1
NOTE: Step numbers coincide with encircled numbers on Figure 2-1, sheet 2.
Step 1. Disconnect a-c power from BOP by removing 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 128-1434) and associated hardware.
Step 4. Remove J204 Connector Assembly (PN 241-0680) from Location #1, save for Step 11.
Step 5. Locate Transformer T202 and note part number (stamped on top):
if PN 100-2167, remove from unit and discard (applicable to BIT 232-F only).
if PN 100-2354, unplug connector from Location #4 only.
Step 6. Locate Rear Bracket and note part number (stamped on outside left edge)
if PN 128-1566, remove and discard, replace with Bracket noted in Step 9.
Step 7. Unpack the BIT Card Installation Components
BIT 232-F: (Transformer, PCB Assembly, Cables #1 and #2, Connector Assembly, three
(3) Knurled Nuts, five (5) washers, Spacer and Bracket).
BIT 232: PCB Assembly, Cables #1 and #2, Connector Assembly, three (3) Knurled
Nuts, five (5) washers, Spacer and Bracket).
Step 8. BIT 232-F only: Mount Transformer T202 (PN 100-2354) if required (ref. Step 5, above).
Step 9. Mount Rear Bracket (PN 128-1810) if required, (ref. Step 6, above).
Step 10. Install PCB Assembly (PN 235-1166) into the guides, slide into position so that mounting
holes in PCB Assembly line up with the three mounting posts on the BOP mounting
bracket.
Step 11. Secure the BIT 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 12. Install Cable #1 (18-position connectors) to the BIT Card; mate the other end of the cable
with Location #1 on BOP A1 Assembly.
Step 13. Step 7AInstall Cable #2 (5-position connectors) to the BIT Card; mate the other end of the
cable with Location #2 on BOP A1 Assembly.
Step 14. Plug in 3 and 9 pin Connectors and Primary Leads from Transformer 100-2354 as shown.
Step 15. Mark "-232" after Model No. on Nameplate (see Detail A).
Step 16. Remove “Control Identification” label (PN 188-1107) and “Address Label” (PN 188-1012).
Affix revised “Control Identification” label (PN 188-1826) and “Address Label” (PN
188-1726) in vacated positions (with part numbers facing front panel).
Step 17. Affix “Connector Identification” label (PN 188-1912) to rear bracket (PN 188-1810) between
rear programming connector and Interface Card (see Detail C).
Step 18. Reinstall BOP cover.
Step 19. Perform calibration procedure detailed in Section 3 of this manual.
2-2
FIGURE 2-1. INSTALLATION OF BIT CARD INTO BOP (SHEET 1 OF 2)
BIT 232 022800
FIGURE 2-1. INSTALLATION OF BIT CARD INTO BOP (SHEET 2 OF 2).
BIT 232 022800
2-3
FIGURE 2-2. BIT 232/BIT 232-F SWITCH AND ADJUSTMENT LOCATIONS
TABLE 2-1. POWER SUPPLY IDENTIFICATION SWITCH S2 SETTING
2-4
MODEL
BOP 50-2M00000000
100-1M10000001
20-10M01000002
36-6M11000003
50-4M00100004
72-3M10100005
100-2M01100005
20-20M11100007
36-12M00010008
50-8M10010009
72-6M0101000A
100-4M1101000B
200-1M1011000C
20-5M0111000D
BOP 50-2M00000000
SW#1 SW#2 SW#3 SW#4 SW#5 SW#6
SELECTOR SWITCH S2 SECTION
HEX
VA LU E
BIT 232 022800
2.4 INPUT/OUTPUT SIGNALS
The RS232 port is a standard 9 pin connector (Figure 2-4) conforming to the IBM AT 9-Pin RS
232 Serial Interface. Refer to Table 2-3 for pin assignments.
TABLE 2-2. INPUT/OUTPUT PIN ASSIGNMENTS
PIN SIGNAL NAME FUNCTION
1 SGND Signal Ground
2 RXD Receive Data
3 TXD Transmit Data
4 DTR Data Terminal Ready
5 SGND Signal Ground
6 DSR Data Set Ready
7 RTS Request To Send
8 CTS Clear To Send
9 SGND Signal Ground
2.5 RS 232 CONNECTIONS
Since the BIT Card uses a 9-pin male connector, it is classified as a Data Terminal Equipment
(DTE) in accordance with the RS 232 Standard (equipment using a female connector is classified as Data Communication Equipment, DCE).
Either a DTE to DTE or a null modem cable is required to connect the BIT Card to an IBM-PC
compatible computer. This cable connects RXD at one end to TXD at the other end, DTR at one
end to DSR at the other end, and CTS at one end with RTS at the other end
FIGURE 2-3. RS 232C CONNECTOR
BIT 232 022800
2-5/2-6
SECTION 3 - CALIBRATION
NOTE: The calibration procedures below are for the purpose of recalibration and for the case
where the BIT card is installed by the user. Unless otherwise noted, syntax is in SCPI.
3.1 EQUIPMENT REQUIRED
The following is a listing of equipment required for calibration of the BIT Card installed in a
Kepco “BOP” Series Power Supply:
A. Precision digital voltmeter (DVM), 5 digit minimum resolution (suggested).
B. An RS232 compatible Controller, (with appropriate software) connected to BOP Power Sup-
ply with an RS232 cable.
C. Precision four-terminal current shunt (with suitable power rating and tolerance for the cur-
rents to be measured).
3.2 ADJUSTMENT OF THE BOP ±10 VOLT CALIBRATION CONTROLS (R31, R32)
NOTE: BOP cover removal required for this procedure.
1. Connect a DVM to the REAR PROGRAMMING CONNECTOR (PC-12); between common
and pin 28 (+10Vdc REFERENCE).
2. Turn the BOP Power Supply “ON” and locate the calibration controls (see Figure 3-1, refer to
Table 3-1). Adjust R31 for +10.000Vdc.
3. Turn the BOP Power Supply “OFF” and connect DVM between common and pin 22 (–10Vdc
REFERENCE).
4. Turn the BOP Power Supply “ON”. Adjust R32 for –10.000Vdc.
5. Turn the BOP Power Supply “OFF”.
3.3 ADJUSTMENT OF THE AMMETER ZERO (R50)
1. Without a load connected to the BOP output, connect the DVM to the REAR PROGRAMMING CONNECTOR (PC-12); between COMMON and pin 10.
2. Turn the BOP Power Supply “ON” and locate AMMETER ZERO control R50 (see Figure 3-1,
refer to Table 3-1).
3. Adjust the control for zero, ±100 microvolts.
4. Turn the BOP Power Supply “OFF”.
BIT 232 022800
3-1
FIGURE 3-1. BOP POWER SUPPLY, INTERNAL CALIBRATION CONTROL LOCATIONS
3.4 ADJUSTMENT OF THE OUTPUT VOLTAGE ZERO (R81)
1. Without a load connected to the BOP output, connect a DVM between the FRONT PANEL
SENSING TERMINALS of the BOP Power Supply.
2. Turn the BOP Power Supply “ON”, program the BOP Power Supply to ZERO VOLTAGE
AND MAXIMUM CURRENT LIMIT.
3. Locate Eo COMP AMP ZERO control R81 (see Figure 3-1, refer to Table 3-1).
4. Adjust control R81 for zero, ±100 microvolts.
3.5 ADJUSTMENT OF THE FULL SCALE OUTPUT VOLTAGE (R21)
1. Program the BOP Power Supply for PLUS FULL SCALE VOLTAGE.
2. Locate VOLTAGE FULL SCALE control R21 (see Figures 2-1 and 3-1, refer to Table 3-1).
3. Adjust control R21 for FULL SCALE VOLTAGE, ±1 millivolt.
4. Program the BOP Power Supply for MINUS FULL SCALE. The output should be NEGATIVE
FULL SCALE ±0.024% (±1 LSB).
3-2
BIT 232 022800
TABLE 3-1. BOP POWER SUPPLY, INTERNAL CALIBRATION CONTROLS
REFERENCE
DESIGNATION
R19 VOLTAGE READING
R20 CURRENT READING
R21 VOLTAGE FULL SCALE
R22 CURRENT FULL SCALE
R31, R32 ( ± ) 10V CAL.
R35 VOLTAGE READBACK ZERO
R36 CURRENT READBACK ZERO
R50 AMMETER ZERO
R81
R83
CONTROL
NAME
EO COMP AMP ZERO
IO COMP AMP ZERO
‘MEASURE’d voltage reading adjustment 3.7
‘MEASURE’d current reading adjustment 3.11
Full scale output voltage adjustment 3.5
Full scale output current adjustment 3.9
Reference voltage calibration 3.2
Aero output voltage adjustment 3.6
Zero output current adjustment 3.10
Sensing amplifier offset adjustment 3.3
Voltage channel zero adjustment
Current channel zero adjustment
3.6 VOLTAGE READING ZERO CALIBRATION (R35)
PURPOSE
ADJUSTMENT
PROCEDURE
(PAR.)
3.4
3.8
1. Program the BOP power supply for ZERO VOLTAGE and MAXIMUM CURRENT LIMIT.
2. ‘MEASURE’ (‘FETCH’ in CIIL syntax) the OUTPUT VOLTAGE of the BOP.
3. Locate VOLTAGE READBACK ZERO control R35 (see Figures 2-1 and 3-1, refer to Table
3-1).
4. Continue to ‘MEASURE’ (‘FETCH’ in CIIL syntax) the VOLTAGE READING while adjusting
control R35 until the ‘MEASUREd’ (‘FETCHed’ in CIIL syntax) value is not 0.0.
5. Continue to ‘MEASURE’ (‘FETCH’ in CIIL syntax) the VOLTAGE READING while adjusting
control R35 until the ‘MEASUREd’ (‘FETCHed’ in CIIL syntax) value is 0.0. Once a stable
value of 0.0 is reached, continue rotating R35 four full (360°) turns in the same direction. Verify VOLTAGE READING is 0.0.
3.7 VOLTAGE READING CALIBRATION (R19)
1. Program the BOP Power Supply for PLUS FULL SCALE VOLTAGE, less one percent (verify
by reading external DVM).
NOTE: If the unit is calibrated using CIIL syntax, send the ‘GAL’ command followed by
the ‘FØ ’ switch command.
2. ‘MEASURE’ (‘FETCH’ in CIIL syntax) the OUTPUT VOLTAGE of the BOP Power Supply.
BIT 232 022800
3. Locate VOLTAGE READ. CAL. control R19 (see Figures 2-1 and 3-1, refer to Table 3-1).
3-3
4. Continue to ‘MEASURE’ (‘FETCH’ in CIIL syntax) the VOLTAGE READING while adjusting
control R19, until the ‘MEASUREd’ (‘FETCHed’ in CIIL syntax) value matches the programmed value.
5. Turn the BOP Power Supply “OFF”.
3.8 ADJUSTMENT OF THE OUTPUT CURRENT ZERO (R83)
1. With the BOP Power Supply “OFF”, connect a precision current shunt between the FRONT
PANEL OUTPUT TERMINALS.
2. Connect the DVM to the REAR PROGRAMMING CONNECTOR (PC 12); between COMMON and pin 10.
3. Turn the BOP “ON” and program the BOP Power Supply to ZERO CURRENT and MAXIMUM VOLTAGE LIMIT.
4. Locate Io COMP AMP ZERO control R83 (see Figure 3-1, refer to Table 3-1).
5. Adjust control R83 for zero, ±0.5 millivolts.
6. Turn the BOP Power Supply “OFF”.
3.9 ADJUSTMENT OF THE FULL SCALE OUTPUT CURRENT (R22)
1. With the BOP Power Supply “OFF”, connect the DVM to the PRECISION 4-TERMINAL
SHUNT (see Figure 3-2)
2. Turn the BOP Power Supply “ON” and program the BOP Power Supply for PLUS FULL
SCALE CURRENT and MAXIMUM VOLTAGE LIMIT.
3. Locate CURRENT FULL SCALE control R22 (see Figures 2-1 and 3-1, refer to Table 3-1).
4. Adjust control R22 for exactly FULL SCALE CURRENT.
5. Program the BOP Power Supply for MINUS FULL SCALE CURRENT. The output should be
NEGATIVE FULL SCALE within ±0.024% (±1 LSB or ±1 mA [which ever is greater] ) of the
POSITIVE VALUE.
3.10 CURRENT READING ZERO CALIBRATION (R36)
1. Program the BOP Power Supply for ZERO CURRENT and MAXIMUM VOLTAGE LIMIT.
2. ‘MEASURE’ (‘FETCH’ in CIIL syntax) the OUTPUT CURRENT of the BOP Power Supply.
3. Locate CURRENT READBACK ZERO control R36 (see Figures 2-1 and 3-1, refer to Table
3-1).
4. Continue to ‘MEASURE’ (‘FETCH’ in CIIL syntax) the CURRENT, while adjusting control
R36, until the ‘MEASUREd’ (‘FETCHed’ in CIIL syntax) value is not 0.0.
5. Continue to ‘MEASURE’ (‘FETCH’ in CIIL syntax) the OUTPUT CURRENT while adjusting
control R36 until the ‘MEASUREd’ (‘FETCHed’ in CIIL syntax) value is 0.0. Once a stable
value of 0.0 is reached, continue rotating R36 four full (360°) turns in the same direction. Verify OUTPUT CURRRENT is 0.0.
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BIT 232 022800
FIGURE 3-2. CURRENT SHUNT CONNECTIONS
3.11 CURRENT READING CALIBRATION (R20)
1. Program the BOP Power Supply for PLUS FULL SCALE CURRENT, less one percent (verify
by reading external DVM).
NOTE: If the unit is calibrated using CIIL syntax, send the ‘GAL’ command followed by the
‘FØ ’ switch command.
2. ‘MEASURE’ (‘FETCH’ in CIIL syntax) the OUTPUT CURRENT of the BOP Power Supply.
3. Locate CURRENT READ. CAL. control R20 (see Figures 2-1 and 3-1, refer to Table 3-1).
4. Continue to ‘MEASURE’ (‘FETCH’ in CIIL syntax) the CURRENT while adjusting control
R20, until the ‘MEASUREd’ (‘FETCHed’ in CIIL syntax) value matches the programmed
value.
BIT 232 022800
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