Home

4500FX User Manual - California Instruments

1. VLT1 15E2 VLT1 15E 2 VLT1 15E 02 VLT1150E 1 A positive exponent value is represented by either an ASC MAT Or an unsigned value 3 7 4 PROGRAM HEADERS A Program Header is a mnemonic of a series of three ASC charac ters used to select a function or identify the data it precedes The header is an abbreviation of the program function it identi fies The PHZ header must be followed by a header extension to separately program each output VLT or CUR to different values See Table 3 11 for the definition of the Program Headers and their related arguments Any header that is sent without an argument will cause the front display to show the corresponding screen Refer to Figure 3 4 for a summary of all possible command sequences California Instruments 45 4500FX User Manual P N 3009 961 TO LOAD A REGISTER AND OR PROGRAM OUTPUT PARAMETERS gt VLT n gt PHZ VLT n gt CLK INT gt REG n gt CUR CUR EXT FRQ gt gt gt gt gt TO REQUEST TALKING OF CALIBRATION COEFFICIENTS gt TLK CAL VLT gt CUR MSR VLT MSR CURI MSR PWR FIGURE 3 4 REMOTE COMMAND SEQUENCES California Instruments 46 4500FX User Manual P N 3009 961 TO SPECIFY THE SERVICE REQUEST INTERRUPT gt SRO n gt TO CALIBRATE THE OUTPUT VOLTA
2. register The following example will delay execution of the program in register 1 until an IEEE 488 Device Trigger is received REC1 TRG The Trigger mode may also be enabled in the local mode by program ming setup parameters without depressing the ENT key The setup values will then be programmed in the remote mode when the Devic Trigger is received 3 7 14 TO PROGRAM THE DEFAULT FREQUENCY ELM A The default frequency is the output frequency after power up or after an IEEE 488 Device Clear The following example will program the default frequency to 50 Hz FLM A 50 3 2 15 TO PROGRAM THE DEFAULT OUTPUT VOLTAGE INI A The default voltage is the output voltage after power up IEEE 488 Device Clear voltage or current fault California Instruments 54 4500FX User Manual P N 3009 961 The following example will program the default voltage to 5 volts NI A 5 NOTE If the default voltage is programmed to a value less than 5 volts the settling time will increase In addition there may be an amplitude fault when the voltage is program med from the default voltage to a value less than 50 of full scale 3 7 16 TO PROGRAM THE DEFAULT CURRENT LIMIT INI C The default current limit is the value after power up or IEEE 488 Device Clear The following example will program the default current limit to 1 amp NI C 3 7
3. When VLT is used as a header in a string with no argument it will cause the front panel to display the measured output voltage 3 7 19 TO TALK THE MEASURED OUTPUT CURRENT TLK MSR CUR MSR CUR may be used as an argument to the header TLK When used as an argument it will set up the AC Power Test System to measure the output current in amps with 0 001 amp resolution up to 2 000 amps The resolution is 0 01 amp up to 20 amps and 0 1 amp up to 200 amps When CUR is used as a header in a string with no argument it will cause the front panel to display the output current TABLE 3 12 ILK ARGUMENTS ARGUMENT EXTENSION DATA DEFIN ON REPORTED 270 312 HV Maximum voltage oi Maximum current None 0 to 270 0 Programmed output voltage 312 HV value in volts 0 to 30 TEEE 488 Listen Address 28 or 29 Configuration Code 0 120 or 240 Phase A C or B Power Source 5 56 4 8 HV Defines the maximum current 0 Not used 0 Not used OW CO 0 00 Programmed output current 4 8 HV limit MSR CUR 0 000 to 200 0 Measurement of output current California Instruments 56 4500FX User Manual P N 3009 961 Total accumulated hours H Accumulated minutes M Accumulated seconds S Default frequency Low frequency limit High frequency limit 47 00 to 66 00 Measured output frequency 47 00 to 66 00 Programmed frequency 0000 to 005 0 lt vo
4. SYNTAX ERROR Wrong string SYNTAX BUS LOCAL ERROR Remote message sent while in local mode CPU MEMORY FAULT CPU failed self test DMA OVERFLOW Remote message greater than 256 bytes ERROR The response after SRQ2 is included in a setup string and the execution of the string or measurement is com pleted No problems California Instruments 62 4500FX User Manual P N 3009 961 caution page California Instruments 63 4500FX User Manual P N 3009 961 PAGE INTENTIONALLY LEFT BLANK California Instruments 64 4500FX User Manual P N 3009 961 SECTION 4 CALIBRATION PROCEDURE 4 1 GENERAL The calibration is divided into two categories a periodic and a nonperiodic calibration The periodic calibration should be performed at a 1 year interval The nonperiodic calibration should only be performed if the periodic calibration cannot be performed or if an adjustable subassembly is replaced The following is a listing of paragraphs that may be performed to fix an indicated problem Any AC Power Test System with a 1 phase output or that has more than one chassis will have paralleled amplifiers PARAGRAPH TITLE 4 31 OUTPUT VOLTAGE CALIBRATION This is a periodic calibration of the output voltage 4 3 2 VOLTAGE MEASUREMENT CALIBRATION This is a periodic calibration of the voltage measurement function 4 3 3 CURRENT OUT
5. These three assemblies ar interconnected with a small mother board A1142 The oscillator Display Assembly connects to the California Instruments 84 4500FX User Manual P N 3009 961 Oscillator Module with a short ribbon cable The Display Assembly is mounted on the front panel The block diagram of the Oscillator Module is shown in Figure 5 2 California Instruments 85 4500FX User Manual P N 3009 961 Figure 5 2 Oscillator Module Block Diagram California Instruments 86 4500FX User Manual P N 3009 961 5 10 CPU GPIB BOARD The CPU GPIB board Al1A3 provides the control and measurement functions of the module A microprocessor circuit accepts commands from the GPIB on the front panel keyboard It sends digital programming information to set the output parameters of the power source Data from measurement circuits are accepted and reported to the display and GPIB Measurement calibration coefficients are stored in a memory backed up by a battery The battery has a 10 year life expectancy Measurement circuits on the CPU GPIB board monitor voltage current power frequency and phase angle Voltage from the rear panel sense connector is scaled converted to a DC voltage by a true rms converter and sent to the microprocessor by the analog to digital converter Current sensed by internal current transformers is scaled converted to a DC
6. Optional screen NO SCREEN NAME EXTENS P N 3009 961 CLK is standard for the Phase B and C Power source TABLE 3 4 OUTPUT PARAMETER SCREEN ONS ARGUMENT The following are for measured values 11 21 22 23 26 27 ELT VLT CUR PWR FOM PZM H MSR MSR MSR MSR MSR M California Instruments S Hrs Min Sec 0 312 Measures O to 2 000 2 01 to 20 00 20 1 to 200 0 O to 0 624Measures th ACTION TAKEN Reports the total accumu lated run time up to 9 999 hours voltage the TRMS output Measures the TRMS output current in Amps Range depends on the programmed value of current O to 6 24 62 4 47 00 to 66 00 0 359 9 28 simulated true power output The O to range depends on the programmed value of current Measures quency in Measures th output fre hertz the phase angle 4500FX User Manual P N 3009 961 of the output current relative to the output voltage Tr T TABLE 3 5 MEASUREMENT SCREENS California Instruments 29 4500FX User Manual SCREEN NO NAME 12 CAL OUT C CUR 13 CAL VLT measured 14 CAL CUR measured as 15 CAL PWR measured 20 POF California Instruments EXTENSIONS A VLTO 255 A VLT 0 359 9 C CUR ARGUMENT ou P N 3009 961 ACTION TAKEN Calibrated the programmed tput v
7. 1 VRMS o Release the ENT key to allow the output voltage to default 6 Repeat steps 1 through 5 for phase B and C of a 3 phase test system if applicable 4 6 3 CURRENT GAIN ADJUSTMENT The current gain adjustment must be made with the top cover removed The current gain adjustment must be made under full load conditions Refer to Figure 4 2 for the location of the 200 AMP and 20 AMP GAIN adjustments Refer to Figure 4 3 for the equipment hookup for the adjustment Perform the following steps Ls Program the output to 200 amps and 60 Hz Adjust the load for 7 5 volts across the output terminals 2a Press and hold the ENT key Short TP2 to TP1 on the current Limit Board A9 3 Adjust the 200 AMP GAIN adjustment for 210 amps 4 Release the ENT key and remove the short to TP2 5 Connect the 1 25 ohm load to the 20 amp output Program the output to 20 amps 6 Press and hold the ENT key Short TP3 to TPl Ea Adjust the 20 AMP GAIN adjustment to 21 0 amps ome Release the ENT key and remove the short from TP3 to TPl Oe Replace the top cover and repeat steps 1 through 8 for the phase B and C power source if applicable 4 6 4 PHASE ANGLE CALIBRATION 4 6 4 1 CALIBRATION OF CURRENT TO VOLTAGE OUTPUT PHASE ANGLE 1 Connect the test equipment as shown in Figure 4 4 Start with the Phase Meter B input connected to the 200 Amp Current Transformer 01V A Tr T California Instruments 77 4500FX U
8. 23 5 C constant line and load conditions unless specified otherwise after 30 minute warm up ELECTRICAL Input Nominal line voltage 60 Hz unless specified otherwise Line Voltage Line Current Line Frequency Efficiency Power Factor 3 Phase 187 252 Vi 1 20 amps 47 to 440 Hz 75 0 7 Line Inrush Current 178 amps Isolation Inpu Inpu to chassis Neutral to chassis 50 VRMS to output 500 VRMS Voltage Output Full to 1 2 voltage range 23 5 C constant line Power 1500 Power Factor Range 5 to Current 5 56 and load with external sense after 30 minute warm up unless specified otherwise VA at 270 volts 312 HV Option O to 1 270 volts 312 HV Option amps from 135 to 270 volts 4 8 amps from 156 to 312 for HV Option linearly derate from full current at 1 2 of full scale voltage to 0 5 amps at 5 0 volts Repetitive Peak Current 13 9 amps RMS 12 amps for HV Op tion Non Repetitive Peak Current 10ms 15 amps RMS 13 amps HV Option Total Harmonic Distortion With Linear Load 0 5 typical harmonics and noise to 80 KHz max Output Noise 20 KHz to 1 MHz 200 millivolts RMS Line Regulation 10 Line change 0 02 of range California Instruments 4500FX User Manual P N 3009 961 Load Regulation No load to Full load 0 05 of range NOTE Warranted specification All other specif
9. HHHDXXX E NND where H Thr letter mnemonic for each message header D Optional header extension VLT or CUR to specify output ref Table 3 4 through 3 7 Alpha numeric or for message header argument Optional ASC E for exponent identification Exponent sign Exponent value 0 to 63 Message string delimiter CR LF or LF o Z Ax Il More than one message header with its corresponding argument may be sent in one setup string with a common delimiter 3 7 3NUMERIC DATA FIELD Parameter values may be sent as an unsigned value with a decimal point or a decimal point with an exponent The phase value may be sent as a signed value The Decimal Point for numeric data values may b ither sent or inferred The two following ASC strings will represent 115 volts VLT115 VLT115 0 There may be any number of digits following the decimal point not to exceed the 256 byte DAM buffer but only the Least Significant Digit LSD of resolution will be recognized The LSD for amplitude is 0 1 volts The LSD for frequency is 0 01 Hz Ct ct California Instruments 44 4500FX User Manual P N 3009 961 Any parameter s numeric value may be of a mixed form with a decimal point and exponent The exponent may be a numeric with or without leading zeros up to a value of 63 The following ASC strings will represent 15 volts
10. O to 5 400 6 24 0 002 KW 0 02 KW O to 54 00 62 4 0 02 KW 0 2 KW Frequency 47 to 66 0 01 Hz 0 02 Hz Phase OEO 399m9 0 10 50 Values in for HV Option Computer Readback Voltage Current Power Frequency programmed and measured values CONTROL Front Panel Control Keypad 20 key keyboard Display 32 character LCD display Indicators Analog voltmeter Output Overload Overtemp erature Power On Remote Control Bus TEEE 488 Subsets SHL AHL T6 3 7 SRI DCI DT Codes and Formats NR1 HR1 SRI Data Rate 200K bytes per second Functions Initial Range Resolution Accuracy Voltage 0 volts 5 to 135 0 01 volt 0 135 volt 135 to 270 0 01 volt 0 54 volt 312 for HV Option Frequency 60 Hz 47 to 66 0 01 Hz 0 001 Phase Angle Current is relative to Voltage Phase B amp C Source Voltage relative to Phase A Source Voltage Current 0 0 0 to 999 0 35 degree 1 degree Voltage 120 C 0 to 999 0 35 degree 1 degree 240 B California Instruments 7 4500FX User Manual P N 3009 961 Current 0 02 amps 0 02 to 2 0 001 amp 0 016 amp 2 01 to 20 0 01 amp 0 16 amp 20 1 to 200 0 1 amp 1 6 amps CALIBRATION Front panel Remote calibration of output voltage output current output phase angle measured volt age measured current and measured simulated power OPTIONS 342 to 456 Vi 1 3 phase input voltage Current with 20 amp maximum output HV for 312 volt Output Voltage Range SYSTEM 3 Phase wi
11. The following example recalls the parameters in register 0 and outputs the parameters after the IEEE 488 GET message RECO TRG 3 7 12 TO PROGRAM EXTERNAL CLOCK CLK Phase B and C Power Sources only The CLK header has an argument of either EXT or INT The CLK header with the EXT argument will make a Power Source a slave The slave will operate at the same frequency as the master The voltage output of the slave will be related to the voltage output of the master by the PHZ value of the slave California Instruments 53 4500FX User Manual P N 3009 961 The following ASC string will program the Phase A or B Power Source to the Internal Clock mode CLK INT The power source can now be frequency programmed independent from the Phase A power source NOTE If there is no signal at the CLOCK input at the rear panel of the associated power system in the EXT Clock mode the output will go to zero volts The ASC string CLK EXT will return the slave AC Power Source to the programmed frequency of the Phase A power source 3 7 13 TO TRIGGER AN OPERATION TRG The TRG header has no argument When the TRG mnemonic is included in a setup string it will delay execution of the string until the GPIB Device Trigger message is sent by the bus controller The TRG header may also be used to trigger register operations by including the TRG header with the string used to recall a
12. test the AC Power Test System ss Current Shunts 0 1 ohm 2 amp Isotek Model RUG Z R100 1 Leeds amp Northrup CAT No 4221 0 01 ohm 20 amp Isotek Model RUG Z RO10 1 Leeds amp Northrup CAT No 4222 0 001 ohm 200 amp Isotek Model RUG Z RO01 2 Digital Voltmeter Fluke Model 8840A modified per CIC005 or equivalent DVM must be calibrated at 60 Hz instead of standard 1 KHz Ss Current Transformers Pearson Model 110 and 3468 4 Resistive Loads Voltage output 48 6 ohms 1500 watt 200 amp load James Biddle JAGAV1 carbon pile 20 amp load 1 25 ohm 500 watt Fx Distortion Analyzer Hewlett Packard 339A California Instruments 66 4500FX User Manual P N 3009 961 6 Phase Angle Meter Krohn Hite 6500A California Instruments 67 4500FX User Manual P N 3009 961 4 3 PERIODIC CALIBRATION The following periodic calibration adjustments should be performed on a 1 year interval 4 3 1VOLTAGE OUTPUT CALIBRATION Connect the Remote Sense lines to the voltage output terminals on TB1 load Connect the AC DVM to the sens lines without an output Allow at least a 15 minute warmup period before calibration Refer to Figure 4 1 for equipment hook up Program the output to 135 0V rms and 60 Hz NOTE If a Phase B or C source is not calibrated as a system the CLK must first be programmed to INT before proceeding Press the MNU key several
13. 488 message END will also be recognized The END message is sent by setting the IEEE 488 End or Identify line true with the last data byte 3 7 27 ERROR MESSAGES Table 3 14 shows all of the possible error messages that can be generated by the AC Power Test System These messages will also be displayed on the front panel of the AC Power Test System 3 7 28 GROUP EXECUTE TRIGGER The trigger mode is enabled when the mnemonic TRG is added to a setup string The trigger command may be inserted anywhere in the string When the mnemonic is detected it will delay execution of the new setup values until the GPIB Device Trigger is sent by the bus controller GPIB Device Trigger will also terminate a programmed ramp or ther program Oo gt The following setup string will recall the values from register 9 and delay execution until the GET message is received Note California Instruments 60 4500FX User Manual GET is the abbreviation for the GP P N 3009 961 B Group Execute Trigger message and does not represent a series of ASC characters See Table 3 9 s RECITRG 3 7 29 SIMULTANEOUS VOLTAGE CURRENT PROGRAMMING Each of the thr power sources that comprise the 3 phase AC Power Test System has an AC power controller Each controller has its own IEEE 488 Listen Address To change the output parameters simultaneously on each o
14. The programmable current limit is incorrectly calibrated SOLUTION Perform the calibration in paragraph 4 6 5 6 6 CAN T PROGRAM AC POWER TEST SYSTEM ON GPIB If the power source does not respond to IEEF 488 GPIB programming the following items may be at fault The power source unit address is wrong SOLUTION Update address See paragraph 3 7 1 California Instruments 90 4500FX User Manual 6 7 GPIB cable is SOLUTION The oscillator has failed SOLUTION DISTORTED OUTPUT Check connection tighten jack screws Replace the oscillator loose at power source rear panel P N 3009 961 See Paragraph 6 10 The AC Power Test System output may have a distorted sine wave from the following causes La 6 8 The power source voltage output is overloaded SOLUTION R move th to a higher value Section 1 The crest factor of the load current exceeds 2 5 SOLUTION overload or program the current limit Reduce the load Observe power source capabilities See The 200 Amp output may have a distorted current output if the offset adjustment is in need of adjustment SOLUTION Connect the 200 amp load to the 200 amp output Monitor the output current waveform with a Current Transform er Connect tion analyzer Program 20 equivalent volts on the th Output Bus Adjust the DI refer to Fig
15. a 3 8 hole for connection When the current is programmed from 0 020 to 20 00 the output is available from TB1 When the current is programmed above 20 00 amps the output is available from bus bars External Voltage Sense Amp connector 1 480705 0 J6 TEEE 488 connector J5 Chassis Slides Zero Manufacturing Company Model CTN 1 20 ENVIRONMENTAL Operating Temperature gg to 50 C Storage Temperature 40 C to 85 C Operating Altitude O to 6000 ft California Instruments 9 4500FX User Manual P N 3009 961 SECTION 2 INSTALLATION AND ACCEPTANCE 2 1 UNPACKING Inspect the unit for any possible shipping damage immediately upon receipt If damage is evident notify the carrier DO NOT return an instrument to the factory without prior approval Do not destroy the packing container until the unit has been inspected for damage in shipment 2 2 POWER REQUIREMENTS The AC Power Test System has been designed to operate from a three phase AC line voltage The input line voltage may be between 187 volts and 252 volts line to line for the standard product An option is available for 342 to 456 volts line to line The frequency may be between 47 Hz and 440 Hz Select an AC input line and hookup wire to the AC Power Test System that will deliver 20 amps per phase and still supply a minimum of 187 volts line to line Refer to Figure 2 2 for circuit breaker requirements of the m
16. control mode Interface Clear A logic line on the GPIB asserted by the controller to clear all inter faces ex default to unlisten and untalk An ASC line feed Local Lockout A GPIB message when asserted will inhibit the instrument from going to local if the CLR LOC key is pressed Remote Enable A logic line on the GPIB as serted by the controller REN enables an in strument to go to local when addressed California Instruments 42 4500FX User Manual P N 3009 961 Selected Device Clear A GPIB message to ini tialize an addressed instrument to it Power on state TABLE 3 10 UNIT ADDRESS GROUP LC 0000 O0O0O0O o UY xk 2 L C0000O0O0O0O0O0O0O0O0O0O0O0O0O0O0O0O LC0DO0O0O0O0O0O0O0O OMOANANDUOBWNEFO O0oo0O0O0O0O0O0O0O0O0O0O0O00O00OoO0OoO0Oo0Oo0Oo0Oo0oOoOoOoOoOoOoOoOoOoOoOoOoOoOoOoOo Oo0oo0O0O0O0O0O0O0O0O0O0O0O0O0Oo0Oo0Oo0OoOo0Oo0oOoOoOoOoOoOoOoOoOoOoOoOoOoOoOoOoOo Spx pe preps ps po po po po pres ps po y po ps Y Vo Il Ane ee California Instruments 43 4500FX User Manual P N 3009 961 3 7 2 MESSAGE FORMAT Th messag sent to the AC Power Test System must have the following format for each parameter
17. output current The value must be in KW example 0 54 Program 20 amps Select the CAL PWR screen and enter the California Instruments 72 4500FX User Manual P N 3009 961 calibration value obtained by multiplying the actual output voltage and the 20 amp output 6 Program 200 amps Select the CAL PWR screen and enter the calibration value Again the value is obtained by multiplying the actual voltage and the actual output current The value must be in Kilowatts 4 4 REMOTE MEASUREMENT CALIBRATION The measurement function of the AC Power Test System may be re motely calibrated The equipment hookup is the same as before except an IEEE 488 Controller must be used to program the AC Power Test System The values for the VLT CUR and PWR strings must be derived from the external AC Digital Voltmeters and Current Shunt To calibrate the measured voltage first program the AC Power Test System to 135 0 volts and 60 Hz Send the following calibration string CAL VLT Desired voltage value To calibrate the measured current send the following string CAL CUR Desired current value To calibrate the measured power value send the following string CAL PWR Desired power value 4 5 REMOTE OUTPUT CALIBRATION The output voltage and current can be calibrated through the IEEE 488 interface Refer to paragraph 4 3 1 and 4 3 3 for the hook up of the test equipment and calib
18. through 15 Load register with pre ceding data REC O through 15 Recall register or speci California Instruments fy link register if it is preceded by program argu ment followed by PRG and 48 4500FX User Manual P N 3009 961 register number REG O through 15 Register load NOTE 4 CLK is available for only the Phase B and C power source TABLE 3 11 CONT PROGRAM HEADERS HEADER EXTENSION ARGUMENT DEFINITION SRQ Os Lex 2 Servic Request disable enable or at completion of program and measure ments TLK Any header Set up to talk argument value or measured value when addressed to talk TRG Execute Trigger set up parameters on GPIB GET message MSR VLT Used with TLK to request measurement of the output voltage ELT Used with TLK to request total accumulated run time MSR CUR Used with TLK to request measurement of the output load current MSR PWR Used with TLK to request measurement of the simulated true power V A COSg PZM C Used with TLK to request measurement of the output current relative to voltage phase angle FOM Used with TLK to request California Instruments 49 4500FX User Manual P N 3009 961 measurement of the output frequency California Instruments 50 4500FX User Manual P N 3009 961 3 7 5 TO PROGRAM OUTPUT VOLTAGE VLT The VLT header is used to identify the voltage command The argument is a numeric d
19. voltage by a true rms converter and sent to the microprocessor by the analog to digital converter The scaled voltage and current waveforms are applied to the inputs of a multiplier The multiplier output is filtered to a DC level and digitized by the analog to digital converter Frequency is computed from the measured time intervals between zero crossings of the Phase A waveform Phase is computed from the differences of measured zero crossings between the Phase A signal and the Phase B or Phase C signal A digital to analog converter on the CPU GPIB board sets the DC voltages that are used for the programmable current limit function 5 11 PHASE A REF BOARD The Phase A Ref Board Al1A5 serves several purposes A program mable clock sets the output frequency of the power source Digital to analog converters program references to set the output amplitude of Phases A B and C A sine wave generator creates a 1024 step waveform which is filtered to provide the Phase A oscillator signal for the voltage output The Phase B sine wave generator is for the 200 Amp output and the Phase C generator is for the 20 and 2 Amp output An external sense amplifier controls the voltage output amplitude 5 12 PHASE B C BOARD The Phase B C Board A1144 uses the DC voltage references and programmable clock from the Phase A Ref board to generat th California Instruments 87 4500F
20. 0FX User Manual P N 3009 961 6 Program the Phase A power source to 200 amps with the following key sequenc 4 ENT to select the current screen CUR 200 PRG ENT to program 200 amps Verify the 200 amp output by measuring 0 20000 VAC from the current shunt 7 To verify the 20 amp output the 0 01 ohm shunt must be used Program 20 amps with the following key sequenc 2 0 PRG ENT Verify the 20 amp output by measuring 0 20000 VAC from the 0 01 ohm shunt 8 To verify the 2 amp output the 0 1 ohm shunt must be used Refer to Figure 2 3 Program 2 amps with the following key sequences 2 PRG ENT Note to program a value less than 1 amp a zero 0 must b ntered before the decimal point Verify the 2 amp output by measuring 0 20000 VAC from the current shunt California Instruments 16 4500FX User Manual P N 3009 961 Figure 2 3 Function Test Setup California Instruments 17 4500FX User Manual P N 3009 961 SECTION 3 OPERATION 3 1 GENERAL A single phase 4500FX Power System has a voltage output and a current output A 3 phase Power Test System has 3 power sources for each of the 3 phase outputs The Phase A Power Source controls the frequency Each of the power controllers control the output voltage current and phase angle for its respective output phase The phase angle of the voltage output for Phase B and C sources is programmed relative to the Phase A voltage output The current outp
21. 1 2 ENT 4 Press the B key to display the cardinal current calibration point Press the C key to display the active calibration value The value may be any value from 0 to 255 At this point if the CLR key is pressed three times all of the calibration values for the active current range will be cleared This may be the appropriate action if calibrations values other than those listed in Table 4 1 are chosen Figure 4 1 Equipment Hookup for Voltage and Current Calibration California Instruments 70 4500FX User Manual P N 3009 961 ADJUST TO PROGRAM CURRENT CALIBRATE TEST SETUP OUTPUT MEASUREMENT FIGURE 1 AC DVM CURRENT SHUNT VALUE RANGE GOOO e e NNN DN Ore Ore ODO G EEEE H H H H H OOOO O DU OQO NNDNDNDNDN OOGG ooooo lt lt lt lt lt OOOO O 3 3 3 SL SS AS SO DO OOOO Oro Oro e 8 o o NNDNDNDNDN OOOO O FIGURE 4 1 CURRENT OUTPUT AND MEASUREMENT California Instruments 71 4500FX User Manual P N 3009 961 10 Additional calibration values may be added at any time if any are available for the programmed current range After pressing the B key the calibration points for the active current range can be displayed by pressing the Up T or Down J key Press the C key t
22. 17 TO TALK TLK MEASURED AND PROGRAMMED DATA The TLK header will setup the AC Power Test System to talk data The TLK header will setup the AC Power Test System to report a programmed output parameter if the program header is the argument for the TLK header To setup the AC Power Test System to report a measured value attach a measurement header as the TLK MSR argument The measure ment headers are VLT CUR and PWR The following string will setup the AC Power Source to measure the output current when it is talk addressed TLK MSR CUR To setup the AC Power source to report the measurement of phase angle or frequency use the TIK arguments of PHZ C and FQM respectively The following string will setup the AC Power Source to measure the phase angle between the voltage and current output when it is talk addressed TLK PZM C A GPIB Service Request SRQ will be generated at the completion of a measurement if the SRQ2 header is included with the TLK string The following string will cause the Service Request to be California Instruments 55 4500FX User Manual P N 3009 961 generated when the power system has finished the power factor measurement TLK PWF SRQ2 3 7 18 TO TALK THE MEASURED OUTPUT VOLTAGE TLK MSR VLT MSR VLT may be used as an argument to the header TLK When used as an argument it will set up the AC Power Test System to measure the output voltage with 0 1 volt resolution
23. 4 7 LOCK J2 is supplied on the rear panel of each 4500FX This signal is used by California Instruments power controllers to phase lock the oscillators in the Phase B and C Power Sources with Phase A California Instruments 23 4500FX User Manual P N 3009 961 3 5 FRONT PANEL PROGRAMMING 3 5 1 KEYPAD The front panel keypad is enabled whenever the REMOTE light is not lit The AC Power Test System may be manually programmed by using the keypad and observing the front panel LCD display Figure 3 3 shows the front panel keypad Table 3 3 lists the key and a brief description While viewing any Output Parameter screen Ref Table 3 4 the screens may be viewed in increasing order by depressing the MON key and in decreasing order by depressing the PRG key While viewing the Measurement Screens the MON and PRG keys work in a similar fashion For example if the CUR parameter screen is displayed the VLT screen may be displayed by pressing the MON key one time The display will be switched back to the CUR screen by pressing the PRG key FIGURE 3 3 KEYPAD California Instruments 24 4500FX User Manual KEY SNW 0 SQW 1 INT 2 EXT 3 4 through 9 MNU T REGUsed J REGUsed P N 3009 961 DESCRIPTION Input the value 0 for all output parameters or to se
24. 4500FX User Manual P N 3009 961 SECTION 1 INTRODUCTION AND SPECIFICATIONS 1 1 INTRODUCTION This instruction manual contains information on the installation operation calibration and maintenance of all power test systems that use the 4500FX 1 2 GENERAL DESCRIPTION The 4500FX is a high efficiency power source that provides a low distortion voltage and current output Three 4500FX Power Sources can be configured as a thr phase power test system The 4500FX is available with a 20 or 200 amp maximum output for the current output Both versions have a 270 volt output 1 3 ACCESSORY EQUIPMENT RACK SLIDES General Devices CTS 120 B307 2 rack slides may be attached to the sides of the power source using 8 32 X 3 8 flat head screws 1 4 SPECIFICATIONS Table 1 1 contains the operation specifications of both the AC Power Source and the AC Power Test System All specifications are tested in accordance with standard California Instruments test procedures The following specifications apply for operation at 100 of full scale voltage constant line voltages and under no load and with External Sense Lines connected unless specified otherwise California Instruments 1 4500FX User Manual P N 3009 961 Figure 1 1 California Instruments Model 4500FX California Instruments 2 4500FX User Manual P N 3009 961 TABLE 1 1 4500FX TEST SYSTEM SPECIFICATION All specifications apply using external voltage sense
25. Also used to recall the program or calibration screen ue Also used to load the identified by the screen register identified by the preceding numeric value California Instruments 25 4500FX User Manual KEY CLR SRO MON PRG ENT P N 3009 961 TABLE 3 3 KEYPAD KE Y DESCRIPTION DE SCRIPTION Used to clear the screen numerical inputs for the display Used to display programmed output parameter values Used repeatedly it will cause the display screens of increasing numeric n umbers to be displayed Used to program setup values in the Program Register Used repeatedly it will cause the display screens of decreasing numeric n umbers to be displayed Used to transfer th to the actual output TABLE 3 e contents of the program register parameters 3 continued KEYPAD KE Y DESCRIPTION 3 5 2 DISPLAY SCREENS A display of data on the front panel LCD display is called a screen There are five types measurement calibration and c Menu screens display the scre The numeric value for each item in a menu screen is the number code that may be used t of screens menu output parameter onfiguration screens en abbreviation with its equivalent o select the screen Tables 3 4 through 3 7 show the numeric values for all screens Without the aid
26. BRATION If adjustments are required for these nonperiodic calibrations the top cover of the AC Power Source will have to be removed A nonperiodic calibration will only be required if a related assembly is repaired or if the performance is out of specification 4 6 1 OUTPUT FREQUENCY CALIBRATION Connect the Frequency Counter to the voltage output Program the output to 135 0 volts and 60 0 Hz Engage the low pass filter on the Frequency Counter to obtain the output frequency If the Frequency Counter does not indicate 60 000 0 0006 Hz adjust C43 for the correct frequency Refer to Figure 4 2 for the location of C43 California Instruments 74 4500FX User Manual P N 3009 961 4 6 2 VOLTAGE GAIN ADJUSTMENT The voltage gain adjustment must be made with the top cover removed To adjust the voltage gain perform the following steps 1 Remove the Voltage Sense wires from the voltage output terminals 2a Remove all loads from the voltage output terminal and connect an AC DVM to the output Figure 4 2 Internal Adjustments and Jumper Locations California Instruments 75 4500FX User Manual P N 3009 961 Figure 4 3 Current and Voltage Gain Adjustment California Instruments 76 4500FX User Manual P N 3009 961 3 s Program the output to 60 Hz and 200 volts Keep the ENT key depressed to prevent the output from defaulting 4 Adjust A9R109 Refer to Figure 4 2 for an output of 220 0
27. G 16 LMT 17 FLM 18 CLM 19 Enter the key sequence 16 ENT The CFG screen will now be displayed Depress the A key to display the present Unit Address It may be changed to any value from 0 to 30 and will be stored in non volatile memory The new unit address will not be updated until power is shut off and reapplied to the power system The following key sequence will change the unit address to 16 16 PRG ENT California Instruments 41 4500FX User Manual P N 3009 961 NOTE This parameter will be shown for only the Phase B and C power sources TABLE 3 9 COMMONLY USED GPIB ABBREVIATIONS ABBREV Attention A logic line on the GPIB asserted only by the controller to indicate the data on the bus represents a bus message An ASC carriage return Device Clear A universal bus message to ini tialize all instruments to their power on states End A message conveyed when a talker uses th EOI line with the last data byte of a data string End or Identify A logic line on the GPIB asserted by a talker to indicate the last byte of a data string End of String A delimiter message that con sists of a data byte s to indicate the end of a data string Group Execute Trigger A GPIB message to trig ger an addressed instrument Go To Local A GPIB message to put an addressed instrument in the local
28. GE OR CURRENT gt CAL VLT n gt CUR TO CALIBRATE THE OUTPUT PHASE ANGLE gt POF A n gt TO REQUEST TALKING A PROGRAMMED PARAMETER OR MEASURED VALUE gt TLK gt VLT CUR FRQ CRL VLT CLK PHZ VLT PHZ CURI PZM C TO RECALL A REGISTER gt rec n gt NOTE Represents either an IEEE 488 END or EOS message The EOS message may be either an ASC Carriage Return CR Line Feed LF or only LF California Instruments 47 4500FX User Manual P N 3009 961 FIGURE 3 4 continued REMOTE COMMAND SEQUENCES TABLE 3 11 PROGRAM HEADERS HEADER EXTENSION ARGUMENT DEFINITION VLT 0 0 to Max Voltage Output voltage in volts 270 Standard 312 HV Option CAL VLT O to 255 Calibrate the output voltage CAL CUR EO 2 55 Calibrate the output current CAL MSR VLT Actual voltage Calibrated measured volt age at external sense point CAL MSR CUR Actual current Calibrate measured current CAL MSR PWR Actual power Calibrate measured simulated power CLK INT EXT Clock source CRL O to max Current Current limit in amps 5 56 Standard 4 8 HV Option CUR 0 02 to Max Current Output current in amps 200 Standard FRQ 47 00 to 66 00 Frequency in hertz PHZ VLT O to 999 0 Phase angle in degrees PHZ CUR O to 999 0 Current phase angle in degrees PRG O
29. PUT AND MEASUREMENT CALIBRATION This is a periodic calibration of the current output and measurement function 43 4 POWER MEASUREMENT CALIBRATION This is a calibration of the power measurement function 4 4 REMOTE MEASUREMENT CALIBRATION 4 5 REMOTE OUTPUT CALIBRATION 4 6 1 OUTPUT FREQUENCY CALIBRATION This is a nonperiodic calibration of the output frequency 4 6 2 VOLTAGE GAIN ADJUSTMENT This iS a nonperiodic adjustment It may be required if a VLT FAULT error message is generated without a California Instruments 65 4500FX User Manual P N 3009 961 load on the voltage output 4 6 3 CURRENT GAIN ADJUSTMENT These are nonperiodic adjustments The adjustments are required if a CUR FAULT error message is displayed 4 6 4 PHASE ANGLE CALIBRATION This is a nonperiodic adjustment The calibration is required if there is a phase error between the output current and voltage or between voltage outputs of a 3 phase system 4 6 5 CURRENT LIMIT CALIBRATION This is a nonperiodic calibration The calibration is required if the available output current from the 270 volt output terminals is not equal to the programmed current limit value The available output current may exceed the programmed value by 10 4 2 TEST EQUIPMENT The following equipment or their equivalents are required to completely
30. X User Manual P N 3009 961 Phase B and C oscillator waveforms The Phase B signal is used for the 200 amp ou 2 amp current outp and C output ampli ut tudes 5 13 DISPLAY MODULE The Display Board tput The Phase C signal is used for the 20 and External sense circuits control the Phase B A11A13 is held to the power source by a small panel and is connected through a short ribbon cable It holds 20 button keyboard and a 32 character LCD display A knob on board allows the display viewing angle to be adjusted California Instruments 88 the the 4500FX User Manual P N 3009 961 SECTION 6 Gsl MAINTENANCE AND TROUBLESHOOTING GENERAL This section describes the suggested maintenance and troubleshoot ing procedures Table 6 1 lists the paragraph titles and page numbers for the Troubleshooting section If the AC Power Test System does not appear to function normally use this section to isolate the problem If the problem cannot be found using these steps consult the factory TABLE 6 1 PARAGRAPH PROBLEM PAGE 6 2 Poor Voltage Current Output Accuracy 80 6 3 Poor Output Voltage Regulation 80 6 4 Overtemperature Lamp On 81 6 5 Overload Lamp On 81 6 6 Can t Program AC Power Test System 81 on GPIB 6 7 Distorted Output 82 6 8 No Output 82 6 2 POOR VOLTAGE CURRENT OUTPUT ACCURACY If fol 6 3 If fol the power sour
31. X User Manual P N 3009 961 actual voltage of the voltage output The three position toggle switch at the right side of the meter must be set at the left most position California Instruments 19 4500FX User Manual P N 3009 961 Figure 3 1 Front Panel Controls and Indicators California Instruments 20 4500FX User Manual P N 3009 961 An OVERTEMP lamp illuminates when the temperature of the power amplifier heat sinks has surpassed a maximum set level When the fault is detected the outputs are disabled and must be repro grammed after the overtemperature condition has been eliminated An OVERLOAD lamp illuminates when the current from the voltage output exceeds the programmed current limit value The outputs will default to 5 0 volts shortly after the condition occurs An LCD digital display shows the numeric value of all programmed output parameters It also shows all error messages and measured values A REMOTE lamp illuminates when the 4500FX has been addressed from the IEEE 488 interface 3 4 REAR PANEL CONNECTIONS Refer to Figure 3 2 for all rear panel connections 3 4 1 POWER INPUT TB3 is the terminal block for the 3 phase input voltage Terminals 1 2 and 3 connect to each leg of the 3 phase input Terminal 5 is the chassis connection which should be connected to the input mains ground 3 4 2 POWER OUTPUT TB1 is the output for voltage and curre
32. XILIARY POWER SUPPLY The Auxiliary Power Supply receives th to the the In addit This Input Power Supply The 300 suppl supply vol 50 VDC supply voltage for operat y vol ing ion to the 50 VDC supply 15VSW1 P N 3009 961 300 supply voltage from tage is then changed the fans and relays is also generated Amplifier Modules Ds Th as th am th an is ch Th Bo Mo Th cu Cu Bo at Cause 5 CURRENT LIMIT BOARD tage is used for the gate drive signal in the e Current Limit Board receives the oscillator signals identified OSC A B and C from the Oscillator Module is board direct the oscillator signals Analog switches on to th respectiv plifier module The analog switches switch the OSC A signal to e vol d the on annel e current limit circuit is also located on the Current Limit This circuit receives a DC signal form the Oscillator CLA that is proportional to the current limit value is compared to the output current The output ard dule is DC signal rrent rrent ard tage amplifier the OSC B signal to the 200 AMP amplifier OSC C signal to the 4 20 AMP amplifier A gain adjustment this board to adjust the gain of the voltage amplifier signal is identified as TA This signal is routed to the Limit Board from current transformers on the Rang
33. al P N 3009 961 relative to the voltage of the Phase A power source The phase C power source also defaults to the External Clock Mode with the phase angle of the voltage output set to 120 degrees The frequency of the Phase B and C power sources is controlled by the Phase A controller the Phase B and Phase C power source can be operated independently from the phase A power source by programming the B or C controller to the Internal Clock mode In this mode the controller can program the output frequency of its own output To program the Internal Clock mode enter the following key sequence 2 ENT To select the Clock CLK screen INT PRG ENT To program the Internal Clock mode The frequency of the power source can be programmed by entering the following key sequences 6 ENT To select the Frequency FRQ screen 50 PRG ENT To program 50 Hz 3 5 9TO LOAD REGISTERS The AC Power Test System has 16 registers that can be used to store setups All of the data stored in the registers will be retained during power down The REC and REG keys are used for register operations Any of the previous examples may be stored in a register by adding the extra step of entering the register number followed by depressing the REG key This extra step must b ntered before the last ENT keystroke The following example will load the data to program 135 volts 200 amps and 60 hertz into registe
34. ata field from 0 0 to the maximum voltage 270 standard An attempt to program a value higher than this value will generate an error and a SRQ on the GPIB The following ASC strings will program the voltage given in the left column 0 0 volts VLTO 10 5 volts VLT10 5 or VLT1 05El or VLT105E 1 100 volts VLT100 or VLT100 0 or VLTLE2 3 7 6 TO PROGRAM FREQUENCY FRQ The FRQ header is used to identify the following numeric data as frequency The following string will program the frequency to 60 56 Hz FRQ 60 56 3 7 7 TO PROGRAM PHASE ANGLE PHZ The PHZ header with the VLT or CUR extension is used to identify the following numeric data as phase The PHZ header with VLT extension will program the phase angle of the voltage output relative to the Phase A power source The PHZ header with the CUR extension will program the phase angle of the current output relative to the voltage output of the same power source The following example will program the current output to 90 degrees relative to the voltage output from the same power source PHZ CUR 90 3 7 8 TO PROGRAM CURRENT LIMIT CRL VLT The CRL header with the VLT extension is used to identify the Current Limit Command The argument is a numeric data field from 0 0 to the maximum rated current of the power system The maximum current is 5 56 amps for the standard 270 volt range The
35. ay fault when a voltage is programmed to a value that is less than 50 of full scale To make 5 volts the default voltage continue the key sequence with 5 PRG ENT To program the default current limit perform steps 1 through 3 Next enter the key sequenc 2 9 ENT C At this point any value may be entered up to the maximum current available on the voltage output This value is 5 56 for the standard 270 volt range To make 5 amps the default value continue the key sequence with 5 PRG ENT 3 6 TO MEASURE THE OUTPUT Fiv measurement screens display the output voltage current simulate true power phase and frequency California Instruments 38 4500FX User Manual P N 3009 961 While viewing any measurement screen except ELT any other measurement screen may be displayed by repeatedly depressing either the MON or PRG key The screen may also be displayed by entering its equivalent screen number followed by depressing the ENT key Refer to Table 3 5 for all measurement screen numbers 3 6 1 TO MEASURE THE OUTPUT VOLTAGE VLT 21 The voltage screen displays the actual TRMS output voltage with 0 1 volt resolution This voltage is the voltage at the External Sense connector of the AC Power Test System To access the voltage screen depress the keys 2 1 ENT 3 6 2 TO MEASURE THE OUTPUT CURRENT CUR 22 The current screen displays the actual TRMS load current T
36. before testing any fuse CAUTION California Instruments 93 4500FX User Manual P N 3009 961 Capacitor Cl may have up to 350 VDC after the input circuit breaker has been turned off Before inspecting fuses Fl F2 and F3 discharge Cl Cl may be discharged through a 5 ohm power resistor If Fl is blown replace th fuse and apply power to the power source If the fuse blows again replace Amplifier Al A CUR FAULT error message indicates a problem exists with the current output For a programmed current between 20 1 and 200 0 amps the oscillator signal output is J7 pin 6 the current amplifier is AZ If there is no output current and there is an oscillator signal check the condition of fuse F2 If the fuse is open replace the fuse apply power and reprogram the output If the fuse fails replace amplifier A2 For a program value from 0 02 to 20 00 amps the oscillator output is available on J7 pin 23 The current amplifier is A3 and the fuse is F3 If it is determined that an amplifier module must be replaced perform the following procedures Turn off the input circuit breaker 23 Remove the AC Power Source top cover 3 Remove the four 6 screws that hold the insulator that covers the amplifier module Al A2 and A3 4 Remove any of the three amplifiers by sliding it up and over the guide posts Ds The amplifier may be replaced by following this procedure
37. ce exhibits poor programmed output accuracy the lowing item may be at fault The calibration is incorrect SOLUTION Calibrate the output Refer to Paragraph 4 3 1 for voltage and paragraph 4 3 3 for current POOR OUTPUT VOLTAGE REGULATION the AC Power Test System exhibits poor voltage regulation the lowing item may be at fault The External Sense lines are not connected at the same point monitored by the external voltmeter used for load regulation California Instruments 89 4500FX User Manual P N 3009 961 check SOLUTION Connect AC voltmeter to External Sense lines 6 4 OVERTEMPERATURE LAMP ON If the power source OVERTEMP lamp is on the following may be at fault Ambient temperature is too high SOLUTION Operate power source between 0 and 35 C 2 Fan or ventilation holes are blocked SOLUTION Remove obstructions 3 Fan not working SOLUTION Replace fan Consult factory 6 5 OVERLOAD LAMP ON The OVERLOAD lamp comes on when the load current on the voltage output has exceeded the programmed current limit value If the AC Power Test System OVERLOAD lamp is on the following items may be at fault Ta The output is overloaded SOLUTION Remove the overload Zi The programmable current limit level is set too low for the load being driven SOLUTION Compute and reprogram the correct programmable current limit level Sis
38. e AC Power Test System is in local California Instruments 36 4500FX User Manual P N 3009 961 SYNTAX ERROR Incorrect syntax received from TEEE 488 External Interface VLT RANGE ERROR Attempt to program VLT value greater than voltage limit pP e FRQ RANGE ERROR Attempt to program FRQ less than 47 or r than 66 Hz PHZ RANGE ERROR Attempt to program PHZ greater than 999 9 CRL RANGE ERROR tempt to program CRL greater than the maxi m current allowed for the voltage output At mu 5 56 is standard CUR RANGE ERROR Attempt to program CUR greater than the maxi mum current 200 amps is standard DIV ERROR Consult factory OVERFLOW ERROR Consult factory FRONT PANEL DISPLAY ERROR MESSAGES TABLE 3 8 California Instruments 37 4500FX User Manual P N 3009 961 Bu Depress the MNU key several times until the configuration menu screen is displayed as illustrated below CFG 16 LMT 17 FLM 18 CLM 19 To program the default frequency enter the key sequenc 1 8 ENT A next nter the default frequency followed by de pressing the PRG and ENT key To program the default voltage perform steps 1 through 3 Next nter the key sequence 2 9 ENT A At this point the default voltage from 0 to 5 may be entered If a value of less than 5 volts is entered the output m
39. e Relay If the output current exceeds the programmed value an tenuator will limit the output voltage to a value that will the AC Power Test System to operate at a constant current If the output current limits the output voltage to 10 of the programmed voltage amplitude value the output will default anda VLT FAULT error message will be displayed also be reported through the IEEE 488 GPIB The error message will interface The Current Limit Board has analog switches and summing amplifiers that are used for current measurements summing amplifiers CT B and C are Module for measurement 5 The has LE 6 INDICATOR BOARD The outputs from the routed to the Oscillator Indicator Board has the reference designator A12 This board D indicators for the OVERTEMP and OVERLOAD conditions A front panel selector switch is mounted on the Indicator Board This switch to either the phase A B or C output California Instruments 83 is used to connect the front panel analog meter M1 4500FX User Manual P N 3009 961 5 7 RANGE RELAY BOARD The Range Relay board has all of the AC Power Source relays The relays are operated from 50 VDC One relay is used to switch the output current range between 20 and 2 amps The other relays short the current output after an open circuit condition is detected A current transformer on the Ran
40. essing the ENT key Ty Enter the key sequence 1 3 5 PRG ENT to perform the calibration at 135 volts Dia Repeat the procedure for the other phases 4 3 3CURRENT OUTPUT AND MEASUREMENT CALIBRATION The programmed output current can be calibrated at 5 different program values on the 200 and 20 amp ranges The 2 amp range will accept up to 6 calibration values It is not necessary to calibrate all 16 values In many cases it may be sufficient to only calibrate at or near the maximum value of the range At the factory the current is calibrated at 10 program values If all of the cardinal calibration points for a current range are in error they may be cleared from memory by performing the following steps Refer to Figure 4 1 for the equipment hook up for calibration 1 Select the output current screen with the key sequenc 4 ENT Dos Enter the value of current to be programmed for calibration Start at the top of Table 4 1 for the first program value of current 3 Select the Current Calibration screen with the following key sequence Press the MNU key until the first MNU screen is dis played Refer to paragraph 4 3 1 step 2 Enter the key sequence 9 5 9 ENT California Instruments 69 4500FX User Manual P N 3009 961 Press the MNU key several times until the menu with screen 16 is displayed Select the CAL OUT screen with the key sequenc
41. f the three phases each power source must be set up with the desired parameters The setup string must use the TRG appended to the string The following example assumes that each power source has its own Listen Address The example will set up Phase A to 240 volts 200 amps Phase B will be set up to 242 volts 190 amps and Phase C will be set up to 230 volts 185 amps The following string is for the Phase A power source VLT 240 CUR 200 TRG The following string is for the Phase B power source VLT 242 CUR 190 TRG The following string is for the Phase C power source VLT 238 CUR 185 TRG The outputs for the three power sources will change simultaneously when they receive an IEEE 488 Group Execute Trigger California Instruments 61 4500FX User Manual P N 3009 961 TABLE 3 14 STATUS BYTE VALUES REPORTED MESSAGE VLT FAULT Overload or sense line fault CUR FAULT Current output excessive compliance voltage TEMP A FAULT Al Voltage amplifier overtemperature TEMP B FAULT A2 Current amplifier overtemperature TEMP C FAULT A3 Current amplifier overtemperature CUR RANGE ERROR CUR value greater than highest range VLT RANGE ERROR VLT value greater than 270V or 312V FRO RANGE ERROR FRO value is less than 47 or greater than 66 Hz PHZ RANGE ERROR PHZ value greater than 999 0 CRL RANGE ERROR CRL value greater than maximum val
42. g key sequence into the controller for the Phase A Power Source Select the Frequency FRQ screen by entering the keystrokes 6 ENT Program the frequency to 60 23 hertz with the key sequenc 60 23 PRG ENT To incrementally increase the output frequency to a desired value Tt Hold until desired frequency is reached NOTE The frequency of ither the Phase B or Phase C power source can be programmed independently from the Master Phase A power source by first program ming the External Clock CLK mode before selecting the Frequency screen 3 5 5 TO PROGRAM OUTPUT PHASE ANGLE PHZ 7 The following examples allow the voltage output from the Phase B and C power sources to be set relative to the Phase A power source Program the Phase C voltage output to 5 degree relative to Phase A by programming the Phase C controller with the following key sequences Select the Phase PHZ screen by entering 7 ENT Program the value by entering 0 5 A PRG ENT The up T and down J keys may be used to increment or decrement the output phase 3 5 6 TO PROGRAM CURRENT LIMIT CRL 8 The Current Limit restricts the current from the voltage output 1 Select the Current Limit screen by entering 8 ENT California Instruments 33 4500FX User Manual P N 3009 961 2 Program the Current Limit to 5 amps 5 PRG ENT 3 5 7TO PROGRAM OUTPUT CURRENT CUR 04 NOTE A load or short must be placed across t
43. ge Relay board monitors the output current for the 20 and 2 amp range The signal from the current transformer is used for current feedback and for measurements CESET 5 8 AMPLIFIER MODULES The AC Power Test System has three Amplifier Modules There is one voltage and 2 current amplifiers The Amplifier Modules operate in a switch mode to obtain high efficiency These switch mode amplifiers operate at 200 KHz Each Amplifier Module obtains its input signal from the Current Limit Board These three input signals are identified asf A SIG B SIG and C SIG A 5 00 VRMS input signal will generate a full scale output voltage or current at the output of the AC Power Test System with 100 0 VRMS on the primary of the output transformer at full load Each Amplifier Module requires 300 DC 15 VSW and the 15 VSW1 supplies The 300 VDC supply comes from the Input Power Supply through a 15 amp fuse on the Power Mother Board The Amplifier Module has a thermoswitch mounted on its heatsink If the heatsink temperature reaches 100 C a control signal is sent to the Oscillator Module A logic low on the Error Objects cannot be created from editing field codes 1 control line will cause the error message TEMP FAULT to be generated 5 9 OSCILLATOR MODULE The Oscillator Module is identified with the reference designator A11 The module consists of three printed circuit assemblies
44. he resolution is a function of the programmed output current The resolution is 0 001 amp for program values from 0 000 to 2 000 amps The resolution is 0 01 for program values from 2 01 to 20 00 The resolution is 0 1 amp for program values greater than 20 00 amps To access the current measurement screen depress the keys 2 2 ENT 31653 TO MEASURE THE OUTPUT POWER PWR 23 The power screen displays the simulated output power The simulated output power P is derived from the following relation ship P V I COS The resolution of the measured output power is a function of the programmed output current The resolution is 0 0002 KW for programmed current values from 0 000 to 2 000 amps The resolution is 0 002 KW for current values from 2 01 to 20 00 amps The resolution is 0 02 KW for currents greater than 20 00 amps To access the power measurement screen depress the keys 2 3 ENT 3 6 4 TO MEASURE THE OUTPUT FREQUENCY FQM 26 This screen is accessed by its screen number 26 It displays the measured output frequency with a resolution of 0 01 Hz 3 6 5 TO MEASURE THE OUTPUT PHASE ANGLE PZM 27 This screen is accessed by its screen number 27 It displays the California Instruments 39 4500FX User Manual P N 3009 961 phase angle between the current output and the voltage outputs The current leads the voltage for values To access the screen depress the following keys 2 7 ENT Ca
45. he respec tive current output terminals when an output cur rent is programmed If the current output termi nals do not have the correct output termination a CUR FAULT error message will be generated See the following for the maximum load resistance value PROGRAMMED OUTPUT MAXIMUM MAXIMUM LOAD CURRENT TERMINALS COMPLIANCE VOLTAGE IMPEDANCE 2 00 Amps 20 Amp 200 volts 100 ohms 20 00 Amps 20 Amp 25 volts 1 25 ohms 200 0 Amps200 Amp 7 5 volts 0 035 ohms MAXIMUM CURRENT OUTPUT LOAD IMPEDANCE The output current is programmed independently for each phase of a 3 phase system The following key entry sequence will program 150 amps on the 200 amp output bus bars 4 ENT To select the CUR screen 1 5 0 PRG ENT To program 150 amps While viewing the CUR screen any output current from 0 02 amp to 200 0 amps can be programmed For values from 0 02 to 20 00 amps the output appears on the TB1 block To program 5 amps enter the following key sequenc 0 5 PRG ENT 3 5 8TO PROGRAM THE CLOCK MODE CLK 02 Phase B and C Power Sources only The Clock and Lock coaxial cables are used to drive the frequency and phase angle for the Phase B and Phase C power sources At power up the Phase B power source defaults to the External Clock mode with the phase angle of the voltage set to 240 degrees California Instruments 34 4500FX User Manu
46. ications are typical Voltage Output continued Frequency Range 47 to 66 Hz Voltage Program Accuracy No Load 5 to 135 volts 0 135 volts 135 to 312 volts 0 54 volts Voltage Temperature Coefficient 0 02 volts per C Voltage Stability 24 Hrs 0 04 volts Isolation Voltage output to chassis 500 volts RMS Current Output Full to 10 of current range 23 5 C constant line and load with 30 minute warm up Power 1500 VA at 200 amps 500 VA at 20 amps 400 VA at 2 amps Power Factor O to Current Range Resolution Accuracy Compliance Voltage RANGE RESOLUTION ACCURACY no load shorted output COMPLIANCE VOLTAGE 0 02 to 2 amps 0 001 0 016 amps 200 at 2 amps 2 01 to20 amps 0 01 0 16 amps 25 at 20 amps 20 1 to 200 amps 0 1 1 6 amps 7 5 at 200 amps Compliance Voltage See figure Total Harmonic Distortion with Linear Load 0 8 typical harmonics and noise to 80 KHz Le maximum Output Noise 20 KHz to 1 MHz 140 ma RMS at 200 amps 13 ma RMS at 20 amps 1 5 ma RMS at 2 amps Line Regulation for 10 line change 0 05 of range California Instruments 4 4500FX User Manual P N 3009 961 Load Regulation From no load to full load 0 05 of range Frequency Range 47 to 66 Hz NOTE Warranted specificatio
47. igh power outputs for the primary of the output transformers T1 T2 and T3 The outputs are routed through the Power Mother Board to the output transformers The Range Relay Board is identified as A6 This board assembly configures the secondaries of the output transformers for the correct output voltage range The outputs from the AC Power Test System are taken from the Range Relay Board This board also has relays that switches the output to the l phase mode and opens the outputs There is also a circuit on the board that senses for incorrect sense line connections The board assemblies are described in more detail in the following paragraphs 5 3 INPUT POWER SUPPLY This assembly is identified as AD It generates the high power 300 VDC supply This supply voltage is connected to the filter capacitor Cl and to the Power Mother Board Cl is mounted on the bottom cover of the AC Power Source The Input Power Supply also has circuits that generate the DC voltages identified s 18V 15VSW and 8V The 18V supplies are used for the Oscillator Module and the California Instruments 81 4500FX User Manual P N 3009 961 Current Limit Board The 8V supply is used for the Oscillator Module The 15VSW supplies are used for the three Amplifier Modules Figure 5 1 AC Power System Block Diagram California Instruments 82 4500FX User Manual 5 4 AU
48. in reverse order 6 Check the amplifiers associated 15 amp fuse and replace it if necessary Refer to Figure 6 1 for the location of the fuse Fl F2 and F3 are for Al A2 and A3 amplifiers respectively California Instruments 94 4500FX User Manual P N 3009 961 Figure 6 1 Module Location California Instruments 95 4500FX User Manual P N 3009 961 SECTION 7 REPLACEABLE PARTS 7 1 GENERAL This section contains ordering information and a complete list of replaceable parts The parts are listed by their major assembly in alpha numeric order by their reference designators The list includes the parts description manufacturers identification see Appendix A for list of manufacturers and California In struments part numbers 7 2 ORDERING INFORMATION In order to ensure prompt accurate service please provide the following information when applicable for each replacement part ordered a Model number and serial number of the instrument b California Instruments part number for the subassembly where component is located PARENT ITEM NO Cr Component reference designator SEQ NO als Component description DESCRIPTION TRUNCATED e Component manufacturer s FSCM number VENDOR f California Instruments part number COMPONENT ITEM NO All replacement part orders should be addressed to California Instruments Attentio
49. is the phase relationship between the current and voltage for the individual power source If the output current is calibrated first I can be the pro grammed value If the phase angle of the current is programmed to 0 0 O degrees V must be derived from an external TRMS voltmeter for the greatest accuracy at full simulated power 270 volts California Instruments 52 4500FX User Manual P N 3009 961 NOTE There are thr 3 calibration coefficients for current and three 3 for power Current measur ment calibration must be performed at 2 20 and 200 amps Power measurement calibration must also be performed at 2 20 and 200 amps with the output voltage programmed to 270 0 volts 3 7 10 TO PROGRAM A REGISTER REG The REG header is used to load a register with the preceding data A register is identified by a numeric value from 0 to 15 The PRG header is identical to the REG header and is included to standardize other AC power controllers The following example will load the output parameters of 270 volts 19 amps and 60 Hz into Register 0 FRQ 60 VLT 270 CUR 19 REG 0 3 7 11 TO RECALL A REGISTER REC The REC header is used to recall previously loaded data from a register identified by the following register number 0 to 15 The following example recalls and outputs the parameters stored in register 0 by an example in paragraph 3 7 10 RECO
50. lect screen 0 when followed by the ENT key Inputs the value 1 for all output parameters or to select screen 1 when followed by the ENT key Inputs the value 2 for all output parameters or to select screen 2 when followed by the ENT key Also used to select the Internal Synchronize or Internal Clock modes of operation Inputs the value select screen 3 used to Inputs the select the External Synch Clock modes of operation indicated m3u when followed by for all output parameters or to Also External the ENT key ronize or numeric value for all output parameters or to select the corresponding screen when followed by the ENT key Selects the Menu screens that show all display screens and the corresponding numeric value The decimal point function of this key is enabled after any numeric key is depressed Used to direct any parameter change to phase A Also used to update any quantity in the display identified as A Used to direct any parameter change to phase B Also used to update any quantity in the display identified as B Used to direct any parameter change to phase C Also used to update any quantity in the display identified as C to increment the value in any output parameter screen or calibration screen program register into any register preceding numeric val to decrement the value in any output parameter
51. lifornia Instruments 40 4500FX User Manual P N 3009 961 3 6 6 ELAPSED TIME ELT 11 This screen displays the total run time accumulated on the AC Power Test System up to 99 999 hours H HoursM Minutes S Seconds 3 7 REMOTE PROGRAMMING WITH ABBREVIATED PLAIN ENGLISH APE Remote programming through the IEEE 488 Interface GPIB consists of sending the unit address and the proper ASC alphanumeric characters to identify the parameter and the numerical value or other argument The description of the abbreviations for GPIB messages used in this section are listed in Table 3 9 These abbreviations must not be confused with th devic dependent abbreviations used to describe the AC Power Test System operating parameters ex FRQ Frequency etc 3 7 1 UNIT ADDRESS This is the A value LSN set in the CFG screen The Unit Address O through 30 corresponds to the HEX value 20 through 3E Refer to Table 3 10 for the equivalent HEX Binary ASC and Decimal equivalents The Unit Address is set at the factory to 1 but may be changed by selecting the CFG Configuration screen and setting a new value To select the CFG screen repeatedly depress the MNU key until menu screen 1 is displayed as illustrated below CLK 02 CUR 04 Enter the key sequence 959 ENT Repeatedly depress the MNU key until the menu screen 5 is displayed as illustrated below CF
52. ltage O to 5 56 1t current limit 4 8 HV Paz v CUR 0 0 Eo 399 9 Programmed output phase angle MSR PWR O to 54 00 Power in kilowatts MSR PWR 62 4 HV V A COS Y O to 5 400 6 24 HV O to 0 5400 0 624 HV PZM C O to 359 9 Measured phase angle of t current output relative t voltage output 0 to Lo Contents of Reg Talk contents of register MSR vit 0 0 to 270 Measured output voltage Standard values shown Values will be different for other ranges output power and options The optional values are shown by TABLE 3 13 EXAMPLE TALK RESPONSE 3 PHASE SYSTEM ASC STRING SENT RESPONSE AFTER ADDRESSED TO TALK TLK LMT LMTA270 0 C200 0 TLK VLT VLT005 0 TLK CFG CFGA0001 B0028 C0120 TLK CIM CLMA05 56 B0000 c0000 TLK CRL VLT CRLVLTO5 56 TLK CUR CUR190 0 TLK ELT ELTHO147 MOO51 S0033 TLK FIM FLMA0060 B0047 c0066 TLK FQM FOM59 97 TLK FRO FRQ60 00 4500FX User Manual P N 3009 961 TLK CLK CLK INT TLK PHZ PHZV000 0 120 0 TLK MSR PWR PWR53 94 TLK PZM PZM000 0 TLK REGO ACTUAL CONTENTS OF REGISTER 0 TLK MSR VLT VLT270 0 TLK MSR CUR CUR190 0 NOTE A Syntax Error message will be generated from the Phase A Power source California Instruments 58 4500FX User Manual P N 3009 961 3 7 20 TO TALK THE MEASURED SIMULATED OUTPUT POWER TLK MSR PWR MSR PWR may be used as an argument to the header TLK When u
53. maximum current for the HV Optional Voltage range of 312 volts is 4 8 California Instruments 51 4500FX User Manual P N 3009 961 amps The following string will program a current limit of 5 0 amps CRL VLT 5 3 7 9 TO PROGRAM CALIBRATION CAL The CAL header when used with the VLT or CUR extension is for calibration of the output voltage or current respectively The argument is a relative coefficient from 0 to 255 A value of 0 will adjust the output to a minimum For remote calibration a IEEE 488 controller computer can be used to monitor the output from an external precision voltmeter or ammeter The IEEE 488 Controller computer can then adjust the calibration coefficient of the output voltage or current to calibrate the output to the programmed value To program the CAL coefficient of the current output to 127 send the following string CAL CUR 127 The CAL header with the extensions of MSR VLT MSR CUR and MSR PWR are used to calibrate the measurement system for voltage current and power respectively The argument is a numeric value that represents th xpected measured value The argument should be equal to the value derived from an external precision TRMS voltmeter or ammeter The value for power P must be derived from the following formula P V I COS Y where V is the actual output voltage is the actual output current
54. n All other specifications are typical Current Output continued Current Temperature Coefficient 0 01 of range per C Current Stability 24 Hrs 0 1 amp for 200 amp range 0 01 amp for 20 amp range 0 001 amp for 2 amp range Isolation Voltage output to chassis 500 volts RMS PROTECTION Output Overcurrent on Voltage Output All outputs voltage and current default to initial condi tions Output Overvoltage on Current Output All outputs default to initial values Output Short Circuit on voltage Output All outputs default to initial values Output Open Circuit on Current Output All outputs default to initial values Sense Line Open Short Reversal All outputs default to initial values Input Overcurrent Circuit breaker trips Input Overvoltage Transients CIXCUTE breaker trips for models with standard input line Overtemperature All outputs voltage and cur rent default to initial condi tions Incorrect Signal Frequency Error message on display and California Instruments 5 4500FX User Manual P N 3009 961 GPIB California Instruments 6 4500FX User Manual P N 3009 961 MEASUREMENTS 23 5 C Front Panel and Remote Range Resolution Accuracy Voltage O to 312 0 1 volt 1 0 volt Current 0 02 to 2 0 001 amp 0 01 amp 2 01 to 20 0 01 amp 0 1 amp 20 1 to 200 0 1 amp 1 0 amp Power O to 0 5400 624 0 0002 KW 0 002 KW
55. n Parts Department 9025 Balboa Avenue San Diego California 92123 1509 California Instruments 96 4500FX User Manual TOP ASSEMBLY REPLACEABLE PARTS FOR 4500FX TOP ASSEMBLY NO 3009 400 2 SEQ COMPONENT NO ITEM NO DESCRIPTION Al 4009 423 1 HEATSINK ASSY SW AMP A2 3009 401 2 HEATSINK ASSY SW AMP A3 3009 401 1 HEATSINK ASSY SW AMP A4 4009 724 1 PC ASSY MOTHER A5 4009 706 1 PC ASSY POWER SUPPLY A6 3009 700 2 PC ASSY RANGE A7 4009 735 1 PC ASSY AUX POWER SUPPLY A8 4009 732 1 PC ASSY MOTHER CTRL A9 4009 728 3 PC ASSY CURRENT LIMIT All 3009 402 2 MODULE ASSY OSC A12 4009 707 1 PC ASSY INDICATOR Bl 241178 FAN 6 48VDC 45A B2 241175 FAN 4 48VDC C 611295 CAP AL 3900 F 400V F 270167 FUSE 15A 250V F2 270167 FUSE 15A 250V F3 270167 FUSE 15A 250V California Instruments 97 VENI SSN ONDFPRERPEPRPRPRPEPEEE O WW OY OY OY OV OD OD OV OY OD OD OD P N 3009 961 OOO O S 00 00 00 Ov 1400 QTY ame A te IE aao E sae E oae S ae E e G E E ae A aa A a DE Se ME ae A ae O O 0
56. n The error SOLUTION Remove the overload Observe the output power capabilities Refer to Section 1 There iS no input to the power amplifiers from the oscillator Check the oscillator signals at the system interface connector J7 24 Oscillator Phase A J7 6 Oscillator 200 Amp J7 23 Oscillator 20 Amp J7 7 Oscillator common return Program 270 volts the signal at J7 24 should be 5 0 0 10 VAC If will be necessary to hold the ENT key depressed to keep the oscillator from faulting SOLUTION If there is no signal at the Systems Interface connector replace the oscillator Refer to paragraph 6 9 SOLUTION If the signal at the System Interface connector is greater than 5 0 VAC it may be necessary to replace th voltage amplifier Refer to paragraph 6 11 Program 200 amps The signal at J7 6 should be 5 0V rms SOLUTION If there is no signal at the Systems Interface connector replace the oscillator If the signal is greater than 5 0V rms replace the 200 AMP AMPLIFIER Program 20 amps The signal at J7 23 should be 1 7V rms SOLUTION If there is no the oscillator California Instruments If the signal signal at the connector replace is greater than 1 7V rms 92 4500FX User Manual P N 3009 961 replace the 20 AMP AMPLIFIER 4 One of the internal fuses F1 F2 or F3 has failed SOLUTION Replace th fuse Remove the inpu
57. nt from 0 02 to 20 00 amps Refer to Table 3 1 for identification of the TB1 terminals For current values greater than 20 00 the output is available from the bus bars Refer to Figure 2 2 for the outputs of a 3 phase power system TB1 DESCRIPTION a 20 Amp Output LO 2 20 Amp Output HI 3 Voltage Output LO 4 Voltage Output HI TABLE 3 1 California Instruments 21 4500FX User Manual P N 3009 961 Figure 3 2 Rear Panel Connections California Instruments 22 4500FX User Manual P N 3009 961 3 4 3 EXTERNAL SENSE J6 is the external sense input connector The external sense input of each power source must be connected to its own voltage output If the input is not connected an VLT FAULT error message will be generated Table 3 2 identifies the pins of connector J6 J6 DESCRIPTION 1 EXT Sense HI Voltage Sense HI 4 EXT Sense HI Voltage Sense LO TABLE 3 2 3 4 4 IEEE 488 CONNECTOR J5 is the IEEE 488 GPIB connector for each 4500FX in the AC Power Test System 3 4 5 SYSTEM INTERFACE This connector is not used for any 4500FX Power System Make no connections to any pin on this connector 3 4 6 CLOCK J1 is supplied on the rear panel of each 4500EFX This signal is used by California Instruments power controllers to synchronize the frequency of the oscillators in the Phase B and C Power Sources with Phase A 3
58. o display the calibration coefficient If the value is 0 enter a value of 127 to speed the calibration process with the key sequence 1 2 7 PRG ENT Press the C key again to display the calibration coefficient Press the Up or Down J key to obtain the precise calibration value for the correct output current Press the ENT key to store the value If Table 4 1 indicates that the current measurement must be calibrated for the programmed current value select the CAL CUR screen with the key sequence 1 4 ENT Program the current measurement value For example enter the key sequence 190 if the measurement value should display 190 0 amps Continue with the current current program screen Ent calibration by selecting the r the key sequence 4 ENT Repeat steps 2 through 9 for the next program value in Table 4 1 4 3 4POWER MEASUREMENT CALIBRATION Ho 2 Short the 200 amp and 20 amp outputs Program the outputs to 270 volts 2 amps and 60 Hz Program the phase angle of the current output to 0 0 degrees Connect the external DVM to the voltage output and note the voltage to calculate the power calibration value in step 4 Select the CAL PWR screen Follow the procedure in paragraph 4 3 3 step 3 to select the screen The CAL PWR screen number is 15 instead of 12 Determine th calibration value by multiplying the actual output voltage and the 2 amp
59. of the tables the MNU key may be used The menu screens will display programmable features that are enabled and their associated screen number only the Table 3 4 shows all of the available Output Parameter screens While viewing any of the screens the associated output parameter may be changed from the keyboard California Instruments 26 4500FX User Manual P N 3009 961 Table 3 5 shows all of the Measurement screens When accessing some Measurement screens up to three seconds may be required to display the screen Table 3 6 shows all of the screens for calibrating the output and measurement functions A special code is required to access these screens Refer to Section 4 Calibration Table 3 7 shows all of the Configuration screens The only value that is user programmable is the IEEE 488 GPIB Listen Address SCREEN NO NAME EXTENSIONS ARGUMENT ACTION TAKEN The following are for changing the output 2 CLK INT EXT Selects the external clock mode of operation 4 CUR 0 02 to Max Sets the output current Current 200 Standard 5 VLT O to Max Sets the output voltage Voltage 270 Standard 312 for HV Option 6 FRO 47 to 66 Sets the output frequen cy 7 PHZ A VLT 0 999 9 Sets the output phase C CUR angle 8 CRL O to Max Sets the current limit Current for the voltage outputs 5 56 Standard 4 8 for HV Option California Instruments 27 4500FX User Manual
60. oltage and current Actual out Calibrates the put voltage voltage to be the same as argument Actual out Calibrates the put current current to be same amps argument Actual simu Calibrates the lated output power simulated power to be same aS argument argument is in KW should be COS The and VLT CUR VLT and CUR are the actual output voltage and current is phase angle between voltage and current Calibrates the program med output phase angle 30 the the 4500FX User Manual NO 16 17 of 18 19 rent SCREEN NAME EXTENSIONS CFG A LSN B CFB C PHZ LMT A VLT 312 C CUR FIM A FRQ B LLM C HLM CLM A CRL California Instruments TABLE 3 6 P N 3009 961 CALIBRATION SCREEN ARGUMENT 0 30 28 PHASE A O PHASE A 240 PHASE B 120 PHASE C Maximum Voltage 270 Standard ACTION TAKEN Sets the IEEE 488 GPIB Listen Address Defines the features en 29 PHASE B amp C abled for Power Source compatibility Defines the default phase angle for the Phase B and C Power Source Defines the upper limit the programmed output HV Option voltage Maximum Current Defines the upper limit of 200 Standard the programmed output current 60 Defines the default fre quency 47 Defines the low frequency limit 66 Defines the high frequenc
61. r 0 Hie Select the FRQ screen and program 60 hertz 6 ENT 60 PRG Des Select the VLT screen and program 135 volts 5 ENT 135 PRG California Instruments 35 4500FX User Manual P N 3009 961 3 Select the CUR screen and program 200 amps 4 ENT 200 PRG 4 Store the program in register 0 O REG ENT To recall and perform th register operation simply enter the register number followed by depressing the REC and ENT keys 3 5 10 ERROR MESSAGES Table 3 8 shows all of the possible error messages displayed on the front panel display The cause of the error message is also shown 3 5 11 TO PROGRAM FREQUENCY VOLTAGE AND CURRENT LIMIT DEFAULT VALUES The default values are the values that appear at power up and after the GPIB Device Clear command To set any of the default values perform the following steps 1 Depress the MNU key several times until the first menu screen is displayed as illustrated below CLK 02 CUR 04 Lis Enter the key sequence 9 5 9 ENT NOTE This item is displayed for the Phase B and C power sources only ERROR MESSAGE CAUSE CUR FAULT Excessive output impedance across current output terminals VLT FAULT Incorrect sens lin connection or overload on voltage output TEMP FAULT Amplifier overtemperature CPU MEMORY FAULT CPU failed self test DMA OVERFLOW Remote message greater than 256 bytes BUS LOCAL ERROR Remot messag sent whil
62. ration points To calibrate the output voltage first program the output voltage to 270 volts by sending the following IEEE 488 string VLT 270 If the output voltage is less than the programmed value of 270 the calibration coefficient must be increased To determin th voltage calibration coefficient send the following string TLK CAL VLT California Instruments 73 4500FX User Manual P N 3009 961 When the power source is addressed to talk it will report CAL VLT nnnn The calibration coefficient nnnn will be a number from 0000 to 0255 If the coefficient is reported as 127 send the following string to increase the output voltage by approximately 0 01 CAL VLT 128 Increment the calibration coefficient until the output voltage is within specification If the output voltage is greater than the programmed value send a calibration coefficient that is less than the existing value The output current can be calibrated similar to the output voltage First program the output current to be calibrated Then determine th calibration coefficient by sending the following string TLK CAL CUR The calibration coefficient that is reported after the AC power source is addressed to talk can be incremented or decremented by the nnn values in the following string CAL CUR nnn Refer to the examples for remote voltage calibration for additional information 4 6 NONPERIODIC CALI
63. recognized the comma semicolon and a space Since these separators are ignored they may be dispersed throughout a setup string The following are two examples of ASC strings with separators PHZA90 FRQ60 VLT115 CRL VLT 5 FRO50 VLT 120 California Instruments 59 4500FX User Manual P N 3009 961 3 7 24 SERVICE REQUEST After power up the GPIB Service Request SRQ will be generated after any error example syntax output fault etc This SRQ output can be inhibited by the SRQ header followed by the single digit 0 The SRQ can be reenabled by the SRQ header followed by 1 Sending SRQ2 causes an SRQ to be generated after the execution of a setup string or when data is available after request of measurements The setup string can be of any type ramp calibra tion etc The following example disables GPIB SRQ SRQO 3 7 25 SERIAL POLL STATUS BYTE Once the bus controller has detected the SRQ it must determine the instrument needing service by the Serial Poll During the polling routine the instrument needing service will return a Status Byte STB greater than decimal 63 The Status Byte values for various faults are given in Table 3 14 3 7 26 END OF STRING The End of String EOS delimiter recognized by the AC Power Test System is the ASC Line Feed LF Carriage Return CR followed by Line Feed may also be used for EOS The End or Identify EOI IEEE
64. rom a pair of bus bars Connec tion to the bus bars is made with a 3 8 bolt and associated hardware Connection to the voltage output and the 0 02 through 20 amp output is made at terminal block TB1 The external sense input to J6 must be connected to the voltage output The voltage regulation is maintained at the External Sense point Refer to Figure 2 2 for all system connections WARNING Failure to connect the External Sense input will cause a fault condition to exist A VLT FAULT error message will be generated when the output voltage is programmed above 5 0 volts Figure 2 2 is the system interconnect drawing For a l phase system make the connections shown only for Phase A CAUTION The 20 Amp output on TB 1 at the rear panel has extremely high voltages between terminals 1 and 2 for currents of 2 amps and less Program 0 0 amps to reduce the output voltage with a high resistance load California Instruments 12 4500FX User Manual P N 3009 961 Figure 2 2 Interconnect drawing California Instruments 13 4500FX User Manual P N 3009 961 2 6 OUTPUT CURRENT RANGES The output current can be programmed from 0 02 to 200 amps For current values from 0 02 amps to 20 00 amps the output is available from TBl For currents above 20 00 amps the output is available from the bus bars CAUTION When the current output from TBl is active the high curren
65. s 3 through 9 4 6 4 2 CALIBRATION OF VOLTAGE TO VOLTAGE OUTPUT PHASE ANGLE Phase B and C sources only The following procedur requires at least two 4500FX power sources 1 Connect the test equipment as shown in Figur 4 4 xcept connect the voltage output of the Phase A source to the A input of the Phase Meter Connect the voltage output of the Phase B or C source to the B input of the Phase Meter 2 Program the Phase A voltage output to 120 0 volts and 60 Hz Program the Phase B or C voltage source to CLK EXT and the voltage to 120 0 volts Program Phase B to 240 and Phase C California Instruments 79 4500FX User Manual P N 3009 961 to 120 NOTE Shown only on Phase B and C Power Source Check the phase angle If the phase angle varies by more than 0 5 from the programmed value perform steps 4 through 8 of paragraph 4 6 4 1 and continue with the following step To calibrate the voltage phase angle press the A key Program the offset value 6 5 CURRENT LIMIT CALIBRATION Select the Current Limit CRL screen Screen 8 and program the Current Limit value of 4 0 amps Monitor the output current from the voltage OUTPUT terminals with the external current transformer and AC DVM Connect an oscilloscope to the output Program the output voltage 190 volts 60 Hz Apply a 48 6 ohm 1500 watt load to the voltage output only Apply a 64 9 ohm 1500 wa
66. sed as an argument it will set up the AC Power Test System to measure the output power in kilowatts The resolution is a function of the programmed output current The resolution is 0 0002 0 002 or 0 02 for a current of 0 02 to 2 2 01 to 20 00 or 20 1 to 200 amps respectively When MSR PWR is used as a header in a string with no argument it will cause the front panel to display the output power 3 7 21 TO TALK THE MEASURED OUTPUT FREQUENCY TLK FQM FOM may be used as an argument to the header TLK There are no extensions for this argument When FOM is used as an argument it will set up the AC Power Test System to measur th output frequency in hertz When FOM is used as a header it will cause the front panel to display the measured output frequency 3 7 22 TO TALK THE MEASURED OUTPUT PHASE ANGLE TLK PZM C PZM C may be used as an argument for the header TLK When used as an argument PZM C will set up the AC Power Test System to measure the phase angle of the output current relative to the output voltage When PZM C is used as a header it will cause the front panel to display the phase measurement screen 3 7 23 MESSAGE SEPARATORS A complete message consists of a header and an argument Since more than one message can be sent in a setup string message separators included in the string between the message will make it more readable to the human operator Thr message separators are
67. ser Manual P N 3009 961 2 Program the voltage to 120 volts the current to 200 amps and the current phase angle to 0 0 degrees For a Phase A power source program the frequency to 60 Hz Figure 4 4 Phase Angle Calibration California Instruments 78 4500FX User Manual P N 3009 961 3 10 ill Check the phase angle If the phase angle is within 0 5 of the program value go to step 10 Perform steps 4 through 9 to calibrate the phase angle if the deviation is more than 0 5 from the program value Access the phase screen with the key sequenc 7 ENT Depress the MNU key several times until the following screen is displayed iS CLK 02 CUR 04 Enter the key sequence 959 ENT Depress the MNU key several times until the Configuration menu screen is displayed CFG 16 LMT 17 FLM 18 CLM 19 To display the POF screen enter the key sequence 20 ENT To calibrate the Current Phase angle press the C key Program the correct phase offset value Remember that a negative value is entered by depressing the period key once or twice after the numeric value Connect the Phase Meter B input to the 20 amp current trans former lv amp Refer to Figure 4 4 Program the output to 20 amps Perform steps 3 through 9 Connect the Phase Meter B input to a 0 5 ohm 5 watt resistor that is in series with the 20 amp output Program the output to 2 0 amps Perform step
68. t bus bars are internally shorted to limit the compliance voltage Likewise when th output is programmed from the bus bars the current output from TBl is shorted A high voltage gt 300 VAC will exist across terminals 1 and 2 of TB1 with an open circuit 2 7 FUNCTION TEST Refer to Figure 2 3 for the test setup Perform the following test sequenc 1 Apply the AC line power and turn on the front panel circuit breaker for all sources No loads should be connected to any of the outputs No load for the current output is defined as a shorted output Al current outputs shown in Figure 2 3 should have a short circuit for their load The shunt should be directly across the output 2 Verify that the POWER ON lamps are lit 3 With the front panel keypad of the Phase A source program the output voltage to 270 volts with the following sequence 5 ENT to select the Voltage screen VLT 270 PRG ENT to program 270 volts 4 Verify that the front panel voltmeter indicates approximately 270 volts The front panel selector switch must be in the Phase A position 5 Repeat steps 3 and 4 for the Phase B and C power sources If no voltage can be programmed for the Phase B and C power sources check the rear panel coaxial California Instruments 14 4500FX User Manual P N 3009 961 lines to the Phase A power source Refer to Figure 2 So California Instruments 15 450
69. t power and discharge capacitor C1 before replacing the fuse Refer to paragraph 6 11 6 9 MODULE REMOVAL Figure 6 1 shows the location of the internal modules and assem blies The figure shows the Amplifier Modules Al A2 and A3 with the insulator removed Al is the Voltage Amplifier A2 is the 200 Amp Current Amplifier and A3 is the 20 Amp Current Amplifier 6 10 OSCILLATOR MODULE REMOVAL REPLACEMENT If a fault is found that requires th replacement of the Oscillator Module assembly 3009 402 perform the following steps and refer to Figure 6 1 for the module locations 1 Turn off the front panel circuit breaker As Remove the power system s top cover 3 Remove th Keyboard Display assembly by loosening the two captive screws on its front panel 4 Unplug the ribbon cable from the Keyboard Display assembly Fa Remove the Oscillator Module A11 by pulling up the package of PC assemblies 6 The module is now removed To replace the module follow these steps in reverse order Make sure the ribbon cable that plugs into the Keyboard Display assembly runs between PC assembly A11 and the front panel 6 11 AMPLIFIER REMOVAL REPLACEMENT A VLT FAULT error message indicates a problem exists with the voltage output If there is no voltage output and there is an oscillator signal at J7 pin 24 check the condition of fuse Fl Disconnect the power source from the input power line
70. th 3 power sources For a 3 phase system the clock amp lock scheme is used for the Phase B and C output When the slave B and C sources are pro grammed to external clock mode they will assume a 240 and 120 phase relationship relative to the Phase A source output The Phase B and C sources will power up in the external clock mode with the phase of the voltage source output set to 240 and 120 respectively relative to the Phase A output The Phase B and C sources can be programmed to the internal clock mode for testing without a Phase A master power source MECHANICAL Dimensions Width 19 inches 48 3 cm Height 10 5 inches 26 6 cm Depth 23 1 inches 58 7 cm Weight 165 pounds 75 2 kg Material Aluminum for Front Panel rear panel and top cover Steel for chassis Finish Front Panel painted gray 26440 per Federal Standard 595 Chassis zinc plate type 2 class 2 Rear panel and top cover iridite Air Intake Exhaust Intake at the sides Exhaust at the rear Modularity Controller All amplifiers DC power supplies Current Limit assembly Range Relay Board All displays Connectors Input Kulka terminal block 9 85 5 TB3 California Instruments 8 4500FX User Manual P N 3009 961 Voltage Output Kulka terminal block 9 85 4 TB1 20 amp and 2 amp output shared with Voltage Output TB1 200 amp output Two bus bars each bus bar has
71. times until the first Menu screen is displayed CLK 02 CUR 04 FIRST MENU SCREEN NOTE Shown only with Phase B and C power source Enter the password 9 5 9 followed by depressing the ENT key Press the MNU key several times until the menu screen 16 is displayed as shown below CFG 16 LMT 17 FLM 18 CLM 19 Enter the key sequenc 1 2 following by depressing the ENT key to display the Output Calibration screen Press the A key for voltage calibration Press the UP fT or Down J key to select a new output calibration value Hold the key until the output voltage is the same as the programmed value 135 0 0 05V rms Press the ENT key to permanently store the value Repeat steps 1 through 5 for the other output phases to be calibrated Connect the external AC DVM to the sense lines of the output to be calibrated 4 3 2 VOLTAGE MEASUREMENT CALIBRATION California Instruments 68 4500FX User Manual P N 3009 961 The voltage measurement is calibrated at 135 volts and 60 hz Program the output to these parameters before starting the calibration Before calibration of voltage measurement first perform the output voltage calibration While viewing the CAL OUT screen in paragraph 4 3 1 press the MON key one time to display the CAL VLT screen If this procedure does not display the CAL VLT screen perform steps 2 and 3 of paragraph 4 3 1 Then enter the key sequence 1 3 followed by depr
72. tt load when the 312 volt range HV Option is installed Increase the output amplitude slowly until the external AC current transformer indicates 4 28 amps Slowly turn A9 R17 on the Current Limit Assembly in a counterclockwise direction until the output just starts to clip Slowly readjust R17 in a clockwise direction just to a point where the clipping disappears For a 3 phase test system repeat steps 1 through 5 for the Phase B and C power sources California Instruments 80 4500FX User Manual P N 3009 961 SECTION 5 THEORY OF OPERATION 5 1 GENERAL An explanation of the circuits within the AC Power Test System is given in this section Refer to Figure 5 1 for a block diagram of the AC Power Test System 5 2 OVERALL DESCRIPTION Input power from the rear panel is routed through the circuit breaker to the Input Power Supply A5 DC voltages from the Input Power Supply are routed to the Power Mother Board A4 the Control Mother Board A8 and the Auxiliary Power Supply A7 The Programmable Oscillator assembly A11 generates the oscillator waveforms and power source control and measurement signals The oscillator assembly is connected to the rest of the power source through the Control Mother Board A10 The three amplifier modules are Al A2 and A3 They take their DC supply voltages and input signal from the Power Mother Board Al They produce the h
73. ultichassis power test system 2 3 MECHANICAL INSTALLATION Each power source has been designed for rack mounting in a standard 19 inch rack The unit should be supported from the sides with optional rack slides See Accessory Equipment Rack Slides in paragraph 1 3 The cooling fan at the rear of the unit must be free of any obstructions which would interfere with the flow of air A 2 5 inch clearance should be maintained between the rear of the unit and the rear panel of the mounting cabinet Also the air intake holes on the sides of the power source must not be obstructed See Figure 1 1 2 4 INPUT WIRING The AC Power Test System must be operated from a three wire thr phas service with a fourth wire for common The common wire is connected to the chassis of each AC Power Source The mains source must have a current rating greater than or equal to the AC Power Source circuit breaker 20 amps Refer to Figure 2 1 for the input power connections Refer to Figure 2 2 for the connections of all power test systems 2 5 OUTPUT CONNECTIONS All output connections are at the rear panel of the power source The outputs are available from a variety of terminal blocks and bus bars Refer to Figure 2 1 California Instruments 10 4500FX User Manual P N 3009 961 Figure 2 1 Rear Panel Connections California Instruments 11 4500FX User Manual P N 3009 961 The 200 amp output is available f
74. ure 4 2 distortion an the distortio The 20 amp ou alyzer offset adjust adjusted SOLUTION to the 20 amp output tment for n analyzer for the with the distortion analyzer e Current Transformer secondary to the distor The distortion analyzer must be HP339A or 0 0 amps and adjust the load for 7 5 Bars the lowest distortion The 80 KHz filter must be enabled on STORTION ADJ for the 200 AMP CURRENT AMPLIF ER on the 20 AMP distortion NO OUTPUT California Instruments CURRENT AMPL F ER D STORT 91 ON A DJ for the to tput may have a distorted current output if the 20 AMP AMPLIFIER needs be Connect a 1 25 ohm load with a current transformer Monitor the current transformer output Program 20 amps and adjust the lowest 4500FX User Manual terminal block TB1 If the AC Power Test System has the following items may be at fault If the External Sense there will be no output also be generated SOLUTION Paragraph 2 5 When b message would be VLT FAULT the voltage output is lines Correctly connect the sense lines generated and the output P N 3009 961 no output at the rear panel are not connected correctly The error message VLT FAULT will Refer to overloaded an error message will relays will ope
75. ut phase angle is programmed relative to the voltage output of the respective phase For currents greater than 20 00 amps the output is available from the bus bars at the rear panel For currents between 0 02 and 20 00 amps the output is available from TBI 3 2 FRONT PANEL CONTROLS All front panel controls are shown in Figure 3 1 A voltmeter selector switch is located at the right side of the front panel voltmeter The three position switch must be at the left most position A three pole circuit breaker is on the left side of the front panel The circuit breaker is used to switch power to the unit When the circuit breaker is switched ON the amber indicator lamp above the circuit breaker illuminates The front panel has a subpanel with a keypad remote lamp LCD display and a viewing angle adjustment The 20 key keypad allows the power source to be manually programmed at the front panel The knob labeled VIEW ANGLE may be turned to adjust the contrast of the front panel display The remote lamp illuminates when th respective phase of the power system has been addressed through the IEEE 488 interface GPIB 3 3 FRONT PANEL INDICATORS A lamp is located just above the input circuit breaker It illuminates when power is applied and the circuit breaker is on An analog voltmeter that indicates from 0 to 300 volts shows the California Instruments 18 4500F
76. y limit Max Current Defines the maximum cur 5 56 Standard 4 8 HV Option 31 limit value 4500FX User Manual P N 3009 961 B PRS 0 Not used C CRS 0 Not used 29 N A VLT 0 5 Defines default voltage C CRL O Max Current Defines the default Current 5 56 Standard Limit 4 8 HV Option NOT USER PROGRAMMABLE TABLE 3 7 CONFIGURATION SCREENS 3 5 3 TO PROGRAM OUTPUT VOLTAGE AMPLITUDE VLT 5 NOTE The external sense lines must be connected to J6 on the rear panel of the AC Power Test System If they are not properly connected an VLT FAULT message will result Refer to Figure 2 3 For Phase B and C Power Sources the error message will also be displayed if the CLOCK and LOCK coaxial cables are not connected The output voltage is programmed independently for each phase of a 3 phase system The examples shown below must be programmed on each of the controllers for the Phase B and C power sources Select the Voltage VLT screen by entering keystrokes 5 ENT The display now shows the VLT parameter screen VLT MON 5 0 Program the output to 115 5 volts with the keystrokes 115 5 PRG ENT Slowly increase the output voltage T Hold until desired value is obtained 3 5 4 TO PROGRAM FREQUENCY FRQ 6 California Instruments 32 4500FX User Manual P N 3009 961 To program the frequency of the AC Power Test System nter th followin

4500FX User Manual - California Instruments

Contents

Download Pdf Manuals

Related Search

Related Contents