KEPCO BHK-MG Series Operator'S Manual Download Page 71

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BHK-1/2-MG 030916

3-25

FIGURE 3-4. TREE DIAGRAM OF SCPI COMMANDS USED WITH BHK-MG 40W POWER SUPPLY

ABORt subsystem

ABORt

INITiate subsystem

INITiate

[:IMMediate]

:CONTinuous bool
:CONTinuous?

CALibrate subsystem

CALibrate

:STATe <boolean> ,password
:STATe?
:VOLTage

:LEVel (MIN | MAX | PROT)
[:DATA] val
GAIN (UP | DOWN)

:CURRent

:LEVel (MIN | MAX | MAG | PROT)
[:DATA] val

:ZERO
:SAVE



:COPY
:DUMP
:RESTore

MEASure subsystem

MEASure

[:SCALar]:CURRent[:DC]?
[:SCALar]:[VOLTage][:DC]?

OUTPut subsystem

OUTPut

[:STATe] ON | OFF or 0 | 1
[:STATe]?

DISPlay subsystem

DISPlay

:CONTrast 0.0 to 0.9
:CONTrast ?
:MODE
:MODE?
:TEXT
:TEXT?

ROOT :

(colon)

STATus subsystem

STATus

:OPERation

:CONDition?
:ENABle val
:ENABle?
[:EVENt]?

:PRESet
:QUEStionable

:CONDition?
:ENABle val
:ENABle?
[:EVENt]?

SYSTem subsystem

SYSTem

:BEEP
:COMM

:SER

:BAUD val



:BAUD?
:ECHO



:ECHO? ON, OFF
:PACE



:PACE? NONE, XON
:PROMpt



:PROMpt? ON, OFF

:GPIB:ADDR val
:GPIB:ADDR?

:ERRor

[:NEXT]?
:CODE?

[:NEXT]?
:ALL?

:GPIB:ADDR val
:GPIB:ADDR?
:KLOCk <boolean>
:KLOCk?
:PASSword

[:CENAble] (code)

:STATe?

:CDISenable (code)
:NEW (OLD | NEW)

:SECUrity

:IMMediate

:VERSion?

INSTRument subsystem

INSTrument

:STATe?
:STATe (ON | OFF)

[SOURce:] subsystem

[SOURce:]
CURRent

[:LEVel]

[:IMMediate]

[:AMPLitude] val
[:AMPLitude]? MIN, MAX

:TRIGgered

[:AMPLitude] val
[:AMPLitude]? MIN, MAX

:LIMit

[:HIGH] val



[:HIGH]? MIN, MAX

:MODE LIST, FIX
:PROTection val

VOLTage

[:LEVel]

[:IMMediate]

[:AMPLitude] val
[:AMPLitude]? MIN, MAX

:TRIGgered

[:AMPLitude] val
[:AMPLitude]? MIN, MAX

:LIMit

[:HIGH] val



[:HIGH]? MIN, MAX

:MODE LIST, FIX
:PROTection val

FUNCtion

:MODE VOLTage CURRent
:MODE?

LIST subsystem

LIST

:CLE
:COUNT val
:COUN?
:COUN:SKIP val
:COUN:SKIP?
:CURRent

[:LEVel] val
[:LEVel]?
:POINter?

:DIR val
:DIR?
:DWELl val
:DWELl?

:POINter?

:DWELl
:QUERy val
:QUERy?
:VOLTage

[:LEVel] val
[:LEVel]?
:POINter?

TRIGGER subsystem

TRIGger

:SOURce



See PAR. 3.3.5.2 and Figure 3-2 for

special programming considerations.

Summary of Contents for BHK-MG Series

Page 1: ...New York 718 461 7000 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 wi...

Page 2: ......

Page 3: ...SD 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...

Page 4: ...installed within a suitably wired equipment rack utilizing a three wire grounded mains con nection See wiring section of this manual for complete electrical wiring instructions EN61010 1 Cl 6 5 4 and...

Page 5: ...e 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 s...

Page 6: ......

Page 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 7 2 6 Insta...

Page 8: ...3 2 15 4 Cycling a Program 3 13 3 2 15 5 Running a Program Once 3 13 3 2 15 6 Stopping a Running Program 3 13 3 2 15 7 Sample Program 3 13 3 2 16 Calibration 3 13 3 3 Remote Mode Programming Using SC...

Page 9: ...low impedance Voltage source 3 37 3 8 3 1 Voltage Mode 3 41 3 8 3 2 Current Mode 3 42 3 8 4 Programming with external voltage using a high impedance low level 1V Voltage source 3 42 3 8 4 1 Voltage Mo...

Page 10: ...uery 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 CON...

Page 11: ...e VOLTage MODE Query B 13 B 54 SOURce VOLTage PROTection LEVel Command B 13 B 55 SOURce VOLTage PROTection LEVel Query B 13 B 56 SOURce VOLTage LEVel TRIGgered AMPlitude Command B 13 B 57 SOURce VOLTa...

Page 12: ...Command B 18 B 83 SYSTem KLOCk Query B 19 B 84 SYSTem PASSword CENable Command B 19 B 85 SYSTem PASSword CDISable Command B 19 B 86 SYSTem PASSword NEW Command B 19 B 87 SYSTem PASSword STATe Query B...

Page 13: ...w 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 O...

Page 14: ...LIST OF FIGURES FIGURE TITLE PAGE viii BHK 1 2 RACK 030916 B 5 Programming Voltage B 14 B 6 Using Status Commands and Queries B 15 B 7 Using System Commands and Queries B 19...

Page 15: ...or Conditions 3 5 3 4 Memory Location Worksheet 3 11 3 5 Sample Program Model BHK MG 500 80MG 3 13 3 6 IEEE 488 GPIB Bus Interface Functions 3 14 3 7 IEEE 488 GPIB Bus Command Mode Messages 3 15 3 8 I...

Page 16: ......

Page 17: ...I command via GPIB or RS 232 interface or via the Status and Remote On Off Port an internal solid state switch sets the voltage current references to zero resulting in zero out put from the power supp...

Page 18: ...xii BHK MG030916 FIGURE 1 1 BHK MG 40W SERIES PROGRAMMABLE POWER SUPPLY...

Page 19: ...full rectangular output characteristic Four single output models are available as listed in Table1 1 Although designed as a stand alone bench top unit the half rack cross section permits mount ing tw...

Page 20: ...ominal power at output 230V a c 0 6A 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 t...

Page 21: ...and load switched between 0 1 x EO max IO max and EO max IO max Small signal 3 dB Bandwidth Fast Mode Voltage 2 5 KHz Load EO max IO max Vprog out 200V d c from keypad Vv analog in 0 2 V rms from ana...

Page 22: ...nly one decimal place is used for setting voltage on Models BHK 1000 40MG and BHK 2000 20MG Protection Overtemperature See PAR 1 4 9a Overvoltage Overcurrent 0 to 1 1 x EOmax 0 to 1 1 x IOmax See PAR...

Page 23: ...exhaust to rear PHYSICAL CHARACTERISTICS Dimensions See Figure 1 2 Weight English 26 lbs Unpacked Metric 12 Kg a c source connections Front Circuit Breaker 2 pole Rear Detachable IEC 3 wire type conn...

Page 24: ...1 6 BHK 1 2 MG OPR 030916 FIGURE 1 2 BHK 40W SERIES POWER SUPPLY MECHANICAL OUTLINE DRAWING SHEET 1 OF 2...

Page 25: ...BHK 1 2 MG OPR 030916 1 7 FIGURE 1 2 BHK 40W SERIES POWER SUPPLY MECHANICAL OUTLINE DRAWING SHEET 2 OF 2...

Page 26: ...1 8 BHK 1 2 MG OPR 030916 FIGURE 1 3 RA 24 RACK ADAPTER WITH TWO 1 2 RACK BHK MG 40W UNITS...

Page 27: ...ommitted amplifiers in order to have control over the entire range of the output voltage current limit or output current voltage limit The analog programming port is not calibrated however the zero po...

Page 28: ...o exceed user defined values that can be lower than the maximum values For example the BHK 500 80MG which has maximum output values of 500V d c 0 08A d c can be limited to 100V d c 0 04A d c for worki...

Page 29: ...rature is monitored If an overtem perature condition is maintained for more than 2 5ms the following actions are initiated the pass element is cut off the output capacitor is discharged and the unit i...

Page 30: ...lag is sent to the host computer via the Status and Remote On Off Port 1 4 10 ANALOG READBACK AND FLAG SIGNALS AVAILABLE FOR CUSTOMER USE Some internal signals produced by the unit are available at co...

Page 31: ...he charge time which is more accurate can also be used in the formula where T discharge or charge time V change in voltage from fully charged to fully discharged or vice versa I discharging or chargin...

Page 32: ...ck Adapter Allows rack mounting of two units side by side see Figure 1 3 RA 24 Slide 2 Allows rack mounted units to slide in and out CS 01 02 03 Kepco 110 QD 20 2 22 2 22 4 Jonathan External Trigger P...

Page 33: ...t for shipping damage before attempting to operate Perform the preliminary operational check as outlined in PAR 2 5 If any indication of damage is found file an immediate claim with the responsible tr...

Page 34: ...in jack see Table 2 4 for 9 pin assign ments EXTERNAL TRIGGER PORT 4 pin connector used to restore previously stored settings or to shut down the output see Table 2 5 for pin assignments NOTE Mating c...

Page 35: ...BHK 1 2 MG SERIES 030916 2 3 FIGURE 2 2 BHK MG SERIES REAR PANEL CONTROLS AND CONNECTIONS...

Page 36: ...J14 1 Armature Relay control armature contact 2 N open Normally open relay control input pins 1 2 open for output ON pins 1 2 closed for output OFF Jumper A3JP1 should be in the factory default positi...

Page 37: ...0 triggers BHK to previously stored setting see PARs 3 3 4 and B 90 TABLE 2 6 REAR OUTPUT TERMINAL STRIP A6TB1 TERMINAL ASSIGNMENTS TERMINAL SIGNAL NAME FUNCTION 1 OUT C Connection to the internal ou...

Page 38: ...ns of internal heat sink assemblies cooled by two internal d c type cooling fans ALL INLET AND EXHAUST OPENINGS AROUND THE POWER SUPPLY CASE MUST BE KEPT CLEAR OF OBSTRUCTION TO ENSURE PROPER AIR ENTR...

Page 39: ...es the model and GPIB address After a few sec onds the display presents the power supply default values Local mode LOC Output On Off Off output voltage and current 0 000V 0 000A and command entry stat...

Page 40: ...y to enable the output of the unit Verify the LCD reads CC constant current mode and a small value for output voltage RS x Io prog x 0 001 in volts where RS resistance of shunt in ohms and Io prog the...

Page 41: ...anel taking care that the bottom of the PC board insulator engage the internal guides and secure with two captive screws NOTE The unit will not operate unless the terminal drawer is securely inserted...

Page 42: ...or interconnecting the load and power supply Individ ual applications location and nature of the load require careful analysis in each case Ground ing a single point in the output circuit can be of gr...

Page 43: ...r longer cable lengths contact Kepco 2 7 5 LOAD CONNECTION GENERAL Load connections to the BHK MG 40W Power Supply are achieved via the rear output terminal strip TB1 and outputs are also available at...

Page 44: ...MODE SELECT Fast mode is established when there is no connection between TB1 2 OUT and TB1 1 OUT C see Figure 2 5 Slow mode factory default configuration can be established by connecting TB1 2 to TB1...

Page 45: ...GROUNDED To configure the BHK MG as a negative output power supply referenced to ground connect the positive output terminal to ground use a 5 terminal link to connect TB1 4 GND CHASSIS to TB1 6 S No...

Page 46: ...the jumper after calibration is initiated A2 JP1 Installed Enables input circuit breaker to trip when arcing at the output is detected A3 JP1 Installed between pin 1 and 2 Jumper installed between pin...

Page 47: ...data functions When the power supply is in command entry status the command functions are effective when the power supply is in data entry status the data functions are effective 3 2 1 1 COMMAND ENTRY...

Page 48: ...s Top or Bottom middle _ _ Data entry status Bottom right in command entry n n mA Actual output current In data entry n n V or n n mA Present programmed value of parameter replaced by data entered Min...

Page 49: ...ct memory location where values are to be stored 3 2 12 EDIT PROG Command Entry Press to select the starting memory location to be edited Then use or to view or modify the parameters of a specific mem...

Page 50: ...ection PAR 1 4 4 but are not displayed If the unit fails a self test the LCD shows the last successful operation and the unit beeps continually If the unit fails self test during power up error messag...

Page 51: ...ge that can be delivered by the power supply PROM FAILS CHECK Refer unit for service by authorized personnel RAM FAILS CHECK Refer unit for service by authorized personnel NvRAM Dpot Err Restore Facto...

Page 52: ...OFF and the bottom line displays output voltage and current zero When the output is disabled volt age and current references are disabled the power supply remains in Command Entry status Pressing the...

Page 53: ...ATION RESET overrides all other local commands to reset the power supply to the power on defaults output voltage set to zero output current set to the value specified as the power up and reset current...

Page 54: ...nimum increment 0 025 of EOmax for voltage 0 025 of IOmax for current In CC mode these keys control output cur rent in CV mode they control output voltage When the unit switches from constant current...

Page 55: ...Iomax where EOmax or IOmax is the rated maximum of the power supply The unit remains in data entry status _ _ waiting for a value equal to or less than the maximum value Press CLEAR to exit without ch...

Page 56: ...ddress of the next memory location in the program 3 2 15 1 CREATING OR MODIFYING A PROGRAM PROGRAM EDIT MODE Creating a program and modifying an existing program are identical except that a program mo...

Page 57: ...ION I SET Current mA V SET Voltage V OCset Overcurrent Protection mA OV set Overvoltage Protection V TIMEval 0 to 655 35 Sec NEXT STEP Next location to execute 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1...

Page 58: ...LCD displays the actual voltage and current however if all the steps are programmed for 0 01 second the LCD reads RUNNING PROGRAM 3 2 15 3 STEPPING THROUGH A PROGRAM Programmed voltage is present at...

Page 59: ...GRAM There are three ways to stop a program that is running Press CLEAR key the program stops after finishing the step location that was being executed when the key was pressed The power supply output...

Page 60: ...puter Controller Talker Listener Tables 3 7 and 3 8 define the messages sent to the BHK MG or received by the BHK MG via the IEEE 488 bus in IEEE 488 command mode and IEEE 488 data mode respectively T...

Page 61: ...ffects the operation of RESET see PAR 3 2 8 The factory default value is output 0 mode TABLE 3 7 IEEE 488 GPIB BUS COMMAND MODE MESSAGES MNEMONIC MESSAGE DESCRIPTION COMMENTS DCL Device Clear Received...

Page 62: ...ues to be set upon receiving the external trigger at pin 4 must be programmed using VOLT TRIG PAR B 56 and CURR TRIG PAR B 46 commands Choose external trigger source by sending TRIG SOUR EXT PAR B 90...

Page 63: ...quire a flash memory update and can take an indeterminate amount on time to complete These commands are SAV CAL SAVE DISP CONT SOUR CURR LIM SOUR VOLT LIM SYST COMM GPIB ADDR SYST COMM SER BAUD SYST C...

Page 64: ...pply address char status_byte status byte from the power supply define MAV 0x10 bit 4 of the status byte is the Message AVailable bit by 488 2 specification Function Send_with_wait INPUT string to be...

Page 65: ...SETTING RS 232 BAUD RATE When the power supply is in local mode command entry status press MENU key until LCD displays BAUD RATE The top line of the LCD indicates the current RS 232 baud rate default...

Page 66: ...Carriage Return CR 0DH Line Feed LF 0AH Back Space BS 08H BS deletes the last character entered with the exception of CR or LF characters Either the CR or LF character acts as the line terminator ini...

Page 67: ...test can be run from the front panel to aid in isolating RS 232 communication prob lems The unit is designed to pass the test only with the Loop Back test connector part of Kit 219 0436 see Table 1 5...

Page 68: ...rrent commands received as well as the load Each time voltage and current commands are received the unit must evaluate the commands and the load conditions to determine the proper operating mode Reduc...

Page 69: ...upply functions such as setting output voltage current limit etc Figure 3 4 is a tree diagram illustrating the structure of SCPI subsystem commands used in the BHK MG 40W Power Supply with the root at...

Page 70: ...d In order to enter the calibration mode the correct calibration access code password must be entered If the password has been forgotten call the factory and a secret password which has been assigned...

Page 71: ...ECHO ON OFF PACE PACE NONE XON PROMpt PROMpt ON OFF GPIB ADDR val GPIB ADDR ERRor NEXT CODE NEXT ALL GPIB ADDR val GPIB ADDR KLOCk boolean KLOCk PASSword CENAble code STATe CDISenable code NEW OLD NE...

Page 72: ...ture showing how message units are combined The following subparagraphs explain each component of the message structure NOTE An alternative to using the message structure for multiple messages defined...

Page 73: ...into a query If there is more than one keyword in the command the query indicator follows the last keyword e g VOLT and MEAS CURR 3 7 4 4 DATA Some commands require data to accompany the keyword eithe...

Page 74: ...tional keywords are enclosed in brackets for identification optional keywords can be omit ted and the power supply will respond as if they were included in the message The root level keyword SOURce is...

Page 75: ...voltage and programmed current since the colon preceding curr indicates that curr is not part of the meas command and starts at the root UPPER case letters in mnemonics are mandatory short form Lower...

Page 76: ...Sample Program For KEPCO power supply using National Instruments GPIB interface card and IBM PC or compatible computer include stdio h include decl h char rd_str 80 Input buffer char dat_str 80 Outpu...

Page 77: ...BHK 1 2 MG 030916 3 31 FIGURE 3 7 ANALOG VOLTAGE PROGRAMMING SIMPLIFIED DIAGRAM FIGURE 3 8 ANALOG CURRENT PROGRAMMING SIMPLIFIED DIAGRAM...

Page 78: ...uired voltage from a number of analog sources Some basic analog configurations are presented in the following paragraphs External resistance Low impedance voltage source Grounded voltage source High i...

Page 79: ...components to analog programming terminals e If possible connect one side of the output to ground either side may be grounded The power supply can also operate with the output floating with respect t...

Page 80: ...NALOG PROGRAMING TERMINALS must also be isolated battery operated or connected to a c source power using an isolating transformer Safety Message When the output is disabled whether by the OUTPUT ON OF...

Page 81: ...put of the uncommitted amplifier is applied via terminals 8 and 9 of TB2 or TB3 to a summing network at the input of the summing amplifier For voltage programming the other input to the summing amplif...

Page 82: ...owing equation gives the output voltage as determined by external resistance REXT Eo 1 10V x REXT 10K x 1 10K 10K x 1 R 10K 1 0 1 x R x REXT 0 1R x REXT V d c where REXT External resistance K ohms var...

Page 83: ...voltage source for programming of either output voltage when the unit is in voltage mode or voltage limit when the unit is in current mode Figures 3 13 isolated voltage source and 3 14 grounded voltag...

Page 84: ...3 38 BHK 1 2 MG 030916 FIGURE 3 11 ANALOG PROGRAMMING OF OUTPUT VOLTAGE VOLTAGE MODE OR VOLTAGE LIMIT CURRENT MODE USING ISOLATED FLOATING LOW IMPEDANCE VOLTAGE SOURCE VS...

Page 85: ...BHK 1 2 MG 030916 3 39 FIGURE 3 12 ANALOG PROGRAMMING OF OUTPUT VOLTAGE VOLTAGE MODE OR VOLTAGE LIMIT CURRENT MODE USING GROUNDED LOW IMPEDANCE VOLTAGE SOURCE VS...

Page 86: ...3 40 BHK 1 2 MG 030916 FIGURE 3 13 ANALOG PROGRAMMING OF OUTPUT CURRENT CURRENT MODE OR CURRENT LIMIT VOLTAGE MODE USING ISOLATED FLOATING LOW IMPEDANCE VOLTAGE SOURCE VS...

Page 87: ...the power supply in voltage mode see Figure 3 11 or 3 12 and the digitally programmed output voltage at zero varying the low impedance voltage source from 0 to 10V causes the output voltage of the po...

Page 88: ...t voltage at zero varying the low impedance voltage source from 0 to 10V causes the output current of the power supply to vary linearly from 0 to IOmax with a slope of 0 1 x IOmax mA per volt The foll...

Page 89: ...to the power supply The external voltage source output must be isolated from ground floating output or be powered from an a c source that is isolated from ground to avoid short circuiting the internal...

Page 90: ...3 44 BHK 1 2 MG 030916 FIGURE 3 16 ANALOG PROGRAMMING OF OUTPUT CURRENT CURRENT MODE OR CURRENT LIMIT VOLTAGE MODE USING HIGH IMPEDANCE LOW LEVEL 1V VOLTAGE SOURCE VS...

Page 91: ...to avoid clipping the waveform at the out put of the power supply ANALOG PROGRAMMING COMBINED WITH DIGITAL PROGRAMMING Eo R x VEXT EoutDP V d c where EoutDP Output voltage programmed digitally from ei...

Page 92: ...mit when the unit is in current mode Figure 3 18 is a similar diagrams for programming either output current when the unit is in current mode or current limit when the unit is in voltage mode CAUTION...

Page 93: ...applied to the inverting input of the uncommitted amplifier which is configured as a current voltage converter CAUTION Observe the following to avoid damage to the power supply The external current so...

Page 94: ...s to avoid clipping waveform at the output of the power supply ANALOG PROGRAMMING COMBINED WITH DIGITAL PROGRAMMING Eo R x IEXT EoutDP V d c where EoutDP Output voltage programmed digitally from eithe...

Page 95: ...onnected from the sensing termi nals by removing the link between TB1 terminal 1 OUT C and terminal 2 OUT This also effectively reduces the main feedback capacitance by removing the internal capacitor...

Page 96: ...pacitor COUT see Table 1 2 then it is not necessary to connect the internal capacitor at the output using the link between terminals TB1 1 and TB1 2 If the external capacitor is compara ble or larger...

Page 97: ...MG power supplies can operate either isolated from ground floating or with either of the two output terminals of the series combination grounded When analog programming is used however it is recommen...

Page 98: ...ower supply with the highest nominal output voltage set the current limit of the other power supply to a larger value 1 larger or more RECOMMENDED PROCEDURE The following steps are recommended to ensu...

Page 99: ...b Program VsetB to Eo VsetA VsetA is set in step 3b c Program overcurrent value of unit B IocsetB to 1 1 x IsetB step 4a d Program overvoltage value of unit B VovsetB to 1 1 x VsetB step 4b 5 To apply...

Page 100: ...3 54 BHK 1 2 MG 030916 FIGURE 3 20 SERIES AUTOMATIC CONFIGURATION...

Page 101: ...slave unit respectively in Volts EOmaxS is the maximum output voltage of the slave unit in Volts REXT is the external programming resistor of the slave unit in K ohms When REXT K ohms EOmaxM Volts the...

Page 102: ...key once on each unit to disable the output 3 Program slave unit as follows a Program IsetS to approximately 1 01 to 1 02 x current limit for power assembly This maximum current limit is never used ex...

Page 103: ...switch b If load switch not used press POWER ON OFF key once on the master unit then once on the slave unit c Alternative Turn both units off by setting POWER switch to off down position first on mast...

Page 104: ...in current mode see Figure 3 22 the master is in current mode and receives current programming commands while output voltage is determined by the current through the load the slave is in voltage mode...

Page 105: ...units a If a load switch is used close the switch Set POWER switch of both units to up position to turn power on b If load switch is not used Set POWER switch of both units to up position to turn powe...

Page 106: ...ach one of the parallel connected power supplies refer to PAR 2 7 5 3 for additional information regarding use of the grounding network c The parallel combination of BHK MG power supplies can operate...

Page 107: ...ower supplies are working with remote sensing and there is a minimum difference one least significant bit 1 LSB between the actual output voltages of the two power supplies When using local sensing it...

Page 108: ...3 62 BHK 1 2 MG 030916 FIGURE 3 23 PARALLEL AUTOMATIC CONFIGURATION Eo is the output voltage of the power assembly...

Page 109: ...pen the switch b If load switch not used press POWER ON OFF key once first on unit B then on unit A c Alternative Turn both units off by setting POWER switch to off down position first on unit B then...

Page 110: ...arallel combination is configured to operate in voltage mode see Figure 3 24 the master operates in voltage mode receiving voltage programming commands and the slave tracks the output current of the m...

Page 111: ...switch of both units to up position to turn power on b If load switch is not used Set POWER switch of both units to up position to turn power on then press OUTPUT ON OFF key once on each unit to disa...

Page 112: ...sing the uncommitted amplifier of the master unit configured as a non inverting repeater between the signal coming from the master sensing resistor signal termi nal 2 and the input to R1 shown in Figu...

Page 113: ...BHK 1 2 MG 030916 3 67 FIGURE 3 25 PARALLEL MASTER SLAVE CURRENT MODE CONFIGURATION...

Page 114: ...1 2 the desired output current Io of the power assembly b Program VsetM to the voltage limit ELIM desired for power assembly c Program overcurrent value of master unit IocsetM to 1 1 x IsetM step 4a d...

Page 115: ...nvolatile memory 4 2 EQUIPMENT REQUIRED The following equipment is required to calibrate the BHK MG 40W Power Supply Digital Voltmeter DVM with 6 digits resolution an at least 0 002 accuracy for d c m...

Page 116: ...r CLEAR to exit calibration without changing password 3 If password is correct LCD reads VOLTAGE CALIB Enter 1 for voltage calibration see PAR 4 4 1 enter 0 to proceed to current calibration Press RES...

Page 117: ...decrease output voltage as necessary to get VDVM reading as close as possible to value listed below Press ENTER when complete VDVM Rs x IoMAX mV where IoMAX mA is the maximum value of output current B...

Page 118: ...IVI driver for the BHK MG 40W which can be downloaded from the Kepco website at www kepcopower com drivers htm Unzip the files and double click on setup exe to install the driver in Program Files Kepc...

Page 119: ...eturn to step 1 and reinstall the driver FIGURE 4 2 MAIN CONTROL PANEL TYPICAL 4 5 2 MAIN CONTROL PANEL The main control panel allows setting the voltage and current enabling and disabling the output...

Page 120: ...s equivalent to the 3 key All adjustments are done using the four arrow buttons that appear during Calibration see Figure 4 3 and Table 4 2 The double arrow buttons and either increase or decrease the...

Page 121: ...Voltage Calibration click YES button see Figure 4 5 FIGURE 4 5 VOLTAGE CALIBRATION 4 The text window reads Connect DVM to Output Sense Remove Shunt Remove any connections between OUT and OUT Connect...

Page 122: ...easure I the rated BHK MG current in Amperes Click the OK button when complete 12 The Current Magnifier window opens see Figure 4 6 The unit automatically sets output current to less than 1 10th the r...

Page 123: ...EVIOUS CALIBRATION VALUES Each time the unit is calibrated the previous calibration values are retained in non volatile mem ory If it is determined that a new calibration is erroneous the previous cal...

Page 124: ...meric and one punctuation character and be at least 6 characters long and not longer than 20 characters in length All alpha data must be upper case and no control nor space characters are allowed The...

Page 125: ...of the Event Status Register ESR are allowed to set the ESB Event Summary Bit of the Status Byte Register Enables the Standard events to be summarized in the Status Byte register 1 set enable function...

Page 126: ...his command sets Standard Event Status Register bit 0 see Table A 2 to 1 when all previous commands have been executed and changes in output level have been completed This command does not prevent pro...

Page 127: ...own command will set command error Bit 5 ESR Returns 32 bit 5 set indicating Command Error has occurred since the last time the register was read IDN Power supply returns KEPCO BHK 1000 04 04 20 2004...

Page 128: ...earing it 1 set function enabled 0 reset function disabled The register is cleared only when subsequent action clears all set bits MSS is set when the power supply has one or more reasons for requesti...

Page 129: ...B 12 B 13 STAT OPER COND B 59 INST STAT B 14 B 15 STAT OPER ENAB B 60 B 61 SOUR LIST CLE B 16 STAT OPER EVENT B 62 SOUR LIST COUN B 17 B 18 STAT PRES B 63 SOUR LIST COUN SKIP B 19 B 20 STAT QUES EVEN...

Page 130: ...CAL COMMANDS AND QUERIES CAL CAL commands and queries are used to perform calibration of the unit via the control interface These commands must be issued in a specific sequence in order to properly ca...

Page 131: ...2 current value established by CURR TRIG VOLT TRIG Returns 215 voltage value established by VOLT TRIG ABOR Pending trigger levels changed to 221V 40mA immediate values VOLT 277 CURR 2 5E 2 Power suppl...

Page 132: ...be displayed and no error message will be generated Upon executing RST DISP MODE NORM is restored Related Commands DISP TEXT DISP MODE DISP MODE RST See example Figure B 2 B 10 DISPlay TEXT QUERY DISP...

Page 133: ...value 0 to 65535 Description Establishes how many times the list is executed Allows user to establish how many times the list is executed The order beginning to end or end to beginning is determined b...

Page 134: ...LIST CURR POIN Syntax Short Form LIST CURR POIN Long Form LIST CURRent POINts Return Value value 0 to 250 Description Identifies the total number of points in a list and the next location to be filled...

Page 135: ...AND LIST VOLT Short Form LIST VOLT LEV exp_value exp_value to max of 250 data points Long Form LIST VOLTage LEVel exp_value exp_value to max of 250 data points exp_value digits with decimal point and...

Page 136: ...uted 100 times 21 steps in the list will be executed 100 times LIST COUN SKIP 4 Specifies that the first 4 steps of the sequence will only be executed the first time through the list For the subsequen...

Page 137: ...ffected When OUTP ON is executed the power supply output is restored to the previously saved programmed values The saved values of voltage and current can be viewed by VOLT and CURR queries Related Co...

Page 138: ...al output current will depend on load con ditions The CURR MAX query returns the maximum current allowed for a particular model CURR Returns programmed current value CURR MIN returns minimum current a...

Page 139: ...ceptable overcurrent range for the power supply model error message 222 Data out of range is posted in the output queue If the power supply output exceeds the current protection level programmed the p...

Page 140: ...scription Sets voltage limit for power supply output If the value exceeds the voltage protection value set by VOLT PROT see PAR B 54 error message 222 Data out of range is posted in the output queue N...

Page 141: ...ply model error message 222 Data out of range is posted in the output queue If the power supply output exceeds the voltage protection level programmed the power supply circuit breaker trips See exampl...

Page 142: ...operation summary bit is the logical OR of all the enabled bits in the Operation Event register See example Figure B 6 NOTES 1 The power supply is assumed to be operating in constant voltage CV mode...

Page 143: ...d See example Figure B 6 NOTE The power supply is assumed to be operating in CV constant voltage mode OUTP ON Output Enabled VOLT 3 CURR 1E 2 Program output to 3V 0 01A STAT OPER ENAB 1056 Mask enable...

Page 144: ...ister see Table B 3 The Questionable Condition Enable Register determines which conditions are allowed to set the Questionable Condition Register it is a mask for enabling specific bits in the Questio...

Page 145: ...D SYST COMM SER ECHO Syntax Short Form SYST COMM SER ECHO ON OFF or 01 00 Long Form SYSTem COMMunication SERial ECHO ON OFF or 01 00 Description Enables ON or 01 or disables OFF or 00 echo mode see PA...

Page 146: ...ent errors are discarded The last error in the queue will be 350 Too many errors Error messages are defined in Table B 4 B 80 SYSTem ERRor CODE QUERY SYST ERR CODE Syntax Short Form SYST ERR CODE Long...

Page 147: ...Long Form SYSTem PASSword NEW old password new password Description Establishes new password The old current password is checked then the replaced by the new password See PAR 3 3 5 2 and Figure 3 2 fo...

Page 148: ...s not recognized 103 Invalid separator Command Error bit 5 For example VOLT PROT received instead of VOLT PROT 108 Parameter Not Allowed Error Command Error bit 5 Volt12 sequence channel number is inv...

Page 149: ...is bigger than limit 311 Memory error Device Error bit 3 1 Power up NV RAM error 314 Save recall memory error Device Error bit 3 1 Using cell other than 1 41 for SAV and RCL 341 Non Volatile Mem CRC e...

Page 150: ......

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