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Cal Power TrueWave TW5250 Service Manual

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Via Acquanera, 29
22100 Como
tel. 031.526.566 (r.a.) fax 031.507.984
info@calpower.it
www.calpower.it
Contact Information
Telephone: 800 733 5427 (toll free in North America)
858 450 0085 (direct)
Fax: 858 458 0267
Email:
Domestic Sales: domorders.sd@ametek.com
International Sales: intlorders.sd@ametek.com
Customer Service: service.ppd@ametek.com
Web:
www.programmablepower.com
March 2011
TrueWave
Switching Amplifier
Service Manual
This Service Manual is incomplete without the
TrueWave Operation Manual, which contains
detailed descriptions of the TrueWave system,
installation instructions, and operating instructions.
™
Models:
TW5250
TW3500
TW1750
Document No.
M161469-03
Rev C

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Summary of Contents for Cal Power TrueWave TW5250

  • Page 1 Via Acquanera, 29 22100 Como tel. 031.526.566 (r.a.) fax 031.507.984 info@calpower.it www.calpower.it TrueWave ™ Switching Amplifier Service Manual Models: TW5250 TW3500 TW1750 This Service Manual is incomplete without the TrueWave Operation Manual, which contains detailed descriptions of the TrueWave system, installation instructions, and operating instructions.
  • Page 3 About AMETEK AMETEK Programmable Power, Inc., a Division of AMETEK, Inc., is a global leader in the design and manufacture of precision, programmable power supplies for R&D, test and measurement, process control, power bus simulation and power conditioning applications across diverse industrial segments.
  • Page 4 This page intentionally left blank.

  • Page 5: Safety Symbols

    Important Safety Instructions Before applying power to the system, verify that your product is configured properly for your particular application. Hazardous voltages may be present when covers are removed. Qualified personnel must use extreme caution when servicing this equipment. Circuit boards, test points, and output voltages also may be floating above WARNING (below) chassis ground.
  • Page 6 Product Family: Models: TW5250, TW3500, TW1750 Warranty Period: One Year WARRANTY TERMS AMETEK Programmable Power, Inc. (“AMETEK”), provides this written warranty covering the Product stated above, and if the Buyer discovers and notifies AMETEK in writing of any defect in material or workmanship within the applicable warranty period stated above, then AMETEK may, at its option: repair or replace the Product;...

  • Page 7: Table Of Contents

    TABLE OF CONTENTS Warranty......................... i Safety Notice.........................iii Safety Symbols ......................iv SECTION 1 – THEORY OF OPERATION INTRODUCTION....................1-1 SYSTEM OVERVIEW ..................1-1 INTERCONNECTION ..................1-3 DIGITAL CONTROL BOARD ................1-4 ANALOG PROCESSOR BOARD..............1-6 HOUSEKEEPING BOARD (HSKP)..............1-7 POWER CONDITIONER MODULE ..............1-8 1.7.1 RECTIFIER INPUT ................1-8 1.7.2 POWER FACTOR CORRECTION (PFC) INPUT ........1-8 1.7.3...
  • Page 8 TABLE OF CONTENTS TW SERIES SECTION 3 – CALIBRATION SCOPE......................3-1 APPLICABLE DOCUMENTS ................3-1 REQUIRED TEST EQUIPMENT..............3-1 SETUP ......................3-2 CALIBRATION RESET ..................3-2 DC OFFSET CALIBRATION ................3-3 DC LOCAL LOW RANGE CALIBRATION ............3-4 DC LOCAL HIGH RANGE CALIBRATION............3-6 DC REMOTE LOW RANGE CALIBRATION............
  • Page 9 SERVICE MANUAL TABLE OF CONTENTS SECTION 4 – PARTS LIST GENERAL ......................4-1 PARTS LIST .....................4-1 ORDERING SPARE PARTS ................4-2 SECTION 5 – DIAGRAMS GENERAL ......................5-1 DIAGRAMS ......................5-1 LIST OF FIGURES FIGURE 1-1 TW 5250...................1-2 FIGURE 1-2 DIGITAL CONTROL BOARD BLOCK DIAGRAM ......1-4 FIGURE 1-3 ANALOG PROCESSOR BOARD BLOCK DIAGRAM ......1-6 FIGURE 1-7...
  • Page 10 TABLE OF CONTENTS TW SERIES This page intentionally left blank. viii...

  • Page 11: Section 1 - Theory Of Operation

    SECTION 1 – THEORY OF OPERATION INTRODUCTION This service manual is intended to assist in the maintenance, troubleshooting, repair to the module level, and calibration of the Elgar TrueWave (TW) products. The topics discussed in this manual may require a level of understanding of analog and digital circuit theory somewhat higher than that required for normal Operator/Programmer activities.
  • Page 12 THEORY OF OPERATION TW SERIES • • • OUTPUT FILTER BACKPLANE BACKPLANE • • • • • • INPUT FILTER...

  • Page 13: Interconnection

    SERVICE MANUAL THEORY OF OPERATION The system shown in Figure 1-1 is a TW5250 meaning that it contains three identical output channels A, B, and C, with a channel consisting of a power module and an amplifier module. Each channel is capable of delivering 1750 VA to the output. One and two channel systems, TW1750 and TW3500, can be achieved by removing channels B and C, or C only (Note: adding or removing a channel requires reprogramming of the system).

  • Page 14: Digital Control Board

    THEORY OF OPERATION TW SERIES DIGITAL CONTROL BOARD SYSTEM MEMORY KEYPAD DISPLAY MC68332 PROCESSOR Analog GPIB Processor QSPI Board RS-232 FIGURE 1-2. DIGITAL CONTROL BOARD BLOCK DIAGRAM The Digital Control Board is the central controller of the TW system. It handles all communication with the outside world and the Analog Processor Board.
  • Page 15 SERVICE MANUAL THEORY OF OPERATION checked for corruption, and if no corruption is found program control is passed to the FLASH memory. The Digital Control Board communicates to the Analog Processor Board via the 68332 processor’s dedicated high speed QSPI. The Digital Control Board is the master in this interface.

  • Page 16: Analog Processor Board

    THEORY OF OPERATION TW SERIES ANALOG PROCESSOR BOARD Digital Control Board QSPI POWER SUPPLY WAVEFORM TMS320C50 SERVO POWER DACs PROCESSOR AMPLIFIERS AMPLIFIERS 8 CHANNEL VOLTAGE FIGURE 1-3. ANALOG PROCESSOR BOARD BLOCK DIAGRAM The Analog Processor Board generates the three–phase sinewave references, signal processes the sampled currents and voltages, performs output voltage servoing, and drives the power amplifiers.

  • Page 17: Housekeeping Board (Hskp)

    SERVICE MANUAL THEORY OF OPERATION The sinewave references are fed either directly to the servo amplifiers or are AC coupled, depending on the selected coupling mode of operation. The servo amplifiers operate on the sinewave reference and the local or remote sense lines. The output of the servo amplifiers feed the power amplifier drivers.

  • Page 18: Power Conditioner Module

    THEORY OF OPERATION TW SERIES POWER CONDITIONER MODULE POWER 48VDC HSKP 3 Phase Input AC Input Stage 290VDC DC/DC Converter Amplifier Rectifier 290VDC Front Panel Input On/Off Stage Switch FIGURE 1-7. POWER CONDITIONER MODULE BLOCK DIAGRAM The power conditioner module, or power module, rectifies the AC input voltage into one 48 Vdc and two isolated 290 Vdc buses.

  • Page 19: Dc/Dc Converter

    SERVICE MANUAL THEORY OF OPERATION The PFC module is a two–board assembly consisting of a PFC Power and a PFC Control board. The single–phase AC input voltage enters the PFC power board where it is rectified by the full-wave bridge rectifier circuit, developing a raw 380 Vdc bus. The raw 380 Vdc bus is then delivered through a soft–start relay to the PFC circuit, which is comprised of a boost converter.

  • Page 20: Glossary

    THEORY OF OPERATION TW SERIES overall switching frequency of 400 kHz. This high switching frequency allows smaller filtering components to be used in the output filter network. The gate drive boards provide isolation between the amplifier control and power boards. The amplifier control board contains supervisory circuitry that monitors the amplifier bus voltages and output neutral to chassis voltages for overvoltage conditions.

  • Page 21: Section 2 - Maintenance And Troubleshooting

    SECTION 2 – MAINTENANCE AND TROUBLESHOOTING 2.1 GENERAL This section contains procedures for corrective maintenance of the TrueWave products. Information is provided for the troubleshooting, disassembly and re-assembly for repair at the module level. A list of test equipment required for maintenance is also included in this section.

  • Page 22: Required Test Equipment

    MAINTENANCE AND TROUBLESHOOTING TW SERIES 2.3 REQUIRED TEST EQUIPMENT The test equipment required to conduct performance verification procedures and troubleshooting is listed in Table 2-1. Substitute equipment may be employed provided said equipment meets the accuracy specifications of the equipment specified. Description Model Number Digital Multimeter (DMM)

  • Page 23: Fault Symptoms / Troubleshooting

    SERVICE MANUAL MAINTENANCE AND TROUBLESHOOTING 2.5 FAULT SYMPTOMS / TROUBLESHOOTING The troubleshooting approach taken in this section will be at the assembly or module level. That is, a fault symptom will be described followed by a suggestive course of action in which to take. That course of action will often include the swapping out of an assembly or module in order to isolate and resolve the failure.

  • Page 24: Table 2-3 Troubleshooting

    MAINTENANCE AND TROUBLESHOOTING TW SERIES TABLE 2-3. TROUBLESHOOTING Fault Symptom Troubleshooting / Corrective Action • Check for proper input voltage to TW unit. With unit turned on, front panel display and fans remain de- Correct the input voltage as necessary. energized.

  • Page 25: Disassembly & Re-Assembly

    SERVICE MANUAL MAINTENANCE AND TROUBLESHOOTING Fault Symptom Troubleshooting / Corrective Action • Check external sense and power lead Unit comes up normally. Upon relay closure unit display “PS wiring. FAULT 1” indicating that a • If problem persists, de-energize unit and redundant overvoltage has occurred.
  • Page 26 MAINTENANCE AND TROUBLESHOOTING TW SERIES 2.6.1 Remove the (20) flat-head screws securing the top cover to the chassis. Note that some of the screws may be covered by white quality seals, and therefore, the seals will need to be broken. Remove cover as shown above. 2.6.2 Loosen the front panel by removing the remaining (8) screws securing the front panel to the chassis.
  • Page 27 SERVICE MANUAL MAINTENANCE AND TROUBLESHOOTING 2.6.3 Remove the fan panel power cables from the Analog board connectors, J10 and J11, as shown above. 2.6.4 Remove the (4) pan head screws (two screws on either side of unit) securing the fan panel assembly to the chassis as shown above.
  • Page 28 MAINTENANCE AND TROUBLESHOOTING TW SERIES 2.6.5 Disconnect fan panel power cable at J3 on the Housekeeping board mounted on the chassis floor. The fan panel assembly can now be carefully removed from the chassis as shown above. Extreme care must be taken not to damage any components on the Analog board as the fan panel assembly is being removed.
  • Page 29 SERVICE MANUAL MAINTENANCE AND TROUBLESHOOTING 2.6.7 Gently remove the retaining clip as shown above. The switch can now be slid back through the front panel. 2.6.8 Remove cables from J1, J4, J7 & J8 on Analog board and J2 & J6 on Control board.
  • Page 30 MAINTENANCE AND TROUBLESHOOTING TW SERIES 2.6.9 To remove the Analog and Control boards from the front panel assembly, remove the (8) mounting screws securing the boards to the panel and gently separate the boards. 2.6.10 Remove the (4) screws attaching the ribbon cable bracket to the chassis assembly as shown above.
  • Page 31 SERVICE MANUAL MAINTENANCE AND TROUBLESHOOTING 2.6.11 Remove the (2, 4 or 6) screws, depending on model, that secure the top bracket to the modules as shown above. 2.6.12 To remove the ribbon cable bracket, remove the top screw (only) that secures the bracket to the air baffle as shown above.
  • Page 32 MAINTENANCE AND TROUBLESHOOTING TW SERIES 2.6.13 Remove the (4) screws that secure the Signal board to the air baffle. 2.6.14 The Signal board can now be removed by disconnecting the (1, 2 or 3) ribbon cable connector(s), depending on model, from the Amplifier module(s) as shown above.
  • Page 33 SERVICE MANUAL MAINTENANCE AND TROUBLESHOOTING 2.6.15 Cut all tie-wraps securing the cable assembly to the air baffle as shown above. 2.6.16 Disconnect both the small enable connector (P1) and the large input power connector (P2) from each of the power modules as shown above. (Note: There may be a small amount of RTV securing the P1 connector, and, the locking tabs of P2 must be depressed before the connector can be removed.) 2-13...
  • Page 34 MAINTENANCE AND TROUBLESHOOTING TW SERIES 2.6.17 Remove the air baffle by lifting straight out as shown above. 2.6.18 Any module can now be removed by, first, gently pulling module towards the front of unit to unlock… 2-14...
  • Page 35 SERVICE MANUAL MAINTENANCE AND TROUBLESHOOTING 2.6.19 … And then lifting the module straight up and out of the chassis as shown above. 2.6.20 The rear panel assembly can now be detached by removing the (13) screws around the rear perimeter of the chassis (4 screws on the left side, 5 screws on the right side and 4 screws on the bottom).
  • Page 36 MAINTENANCE AND TROUBLESHOOTING TW SERIES This page intentionally left blank. 2-16...

  • Page 37: Section 3 - Calibration

    SECTION 3 – CALIBRATION 3.1 SCOPE These procedures cover the calibration of TrueWave models TW1750, TW3500, and TW5250. Calibrating the TrueWave requires no internal adjustment, therefore the covers do not need to be removed (i.e., software calibration). Calibration is accomplished by connecting test equipment to the unit’s output and entering externally measured data via computer over the GPIB port.

  • Page 38: Setup

    CALIBRATION TW SERIES 3.4 SETUP In each calibration section the appropriate setup is listed for the calibration step. WARNING If the TrueWave is configured for International input power (380 VAC 4-wire), ensure that the Neutral is connected and not switched. If the Neutral connection is not made, severe damage to the TrueWave may result.

  • Page 39: Dc Offset Calibration

    SERVICE MANUAL CALIBRATION CAL{1,2,3}:OUTP:REMOTE:HIR:VOLT:OFFSET 0.0 CAL{1,2,3}:OUTP:REM:HIR:VOLT:FREQCAL 1.0 1.0 1.0 1.0 1.0 CAL{1,2,3}:MEAS:LOCAL:LOR:VOLT:GAIN 1.00 CAL{1,2,3}:MEAS:LOCAL:LOR:VOLT:OFFSET 0.0 CAL{1,2,3}:MEAS:LOC:LOR:VOLT:FREQCAL 1.0 1.0 1.0 1.0 1.0 CAL{1,2,3}:MEAS:LOCAL:HIR:VOLT:GAIN 1.00 CAL{1,2,3}:MEAS:LOCAL:HIR:VOLT:OFFSET 0.0 CAL{1,2,3}:MEAS:LOC:HIR:VOLT:FREQCAL 1.0 1.0 1.0 1.0 1.0 CAL{1,2,3}:MEAS:REMOTE:LOR:VOLT:GAIN 1.00 CAL{1,2,3}:MEAS:REMOTE:LOR:VOLT:OFFSET 0.0 CAL{1,2,3}:MEAS:REM:LOR:VOLT:FREQCAL 1.0 1.0 1.0 1.0 1.0 CAL{1,2,3}:MEAS:REMOTE:HIR:VOLT:GAIN 1.00 CAL{1,2,3}:MEAS:REMOTE:HIR:VOLT:OFFSET 0.0 CAL{1,2,3}:MEAS:REM:HIR:VOLT:FREQCAL 1.0 1.0 1.0 1.0 1.0...

  • Page 40: Dc Local Low Range Calibration

    CALIBRATION TW SERIES Wait for the TW to complete its coupling change to DC. Continue with the following GPIB commands: SOUR:VOLT:RANGE LOW SOUR:SENSE LOCAL SOUR{1,2,3}:CURR 5.00 SOUR{1,2,3}:VOLT:OFFSET 0.0 SOUR0:VOLT:PROT 200.0 CAL:UNIQ:DCDAC{A,B,C} 0 OUTPUT ON Wait for the DMM to settle. Record the DMM reading as RDNG1. Send the following GPIB command: CAL:UNIQ:DCDAC{A,B,C} 255 Wait for the DMM to settle.
  • Page 41 SERVICE MANUAL CALIBRATION Send the following query command to the TW and record the return string as MEAS1: MEAS{1,2,3}:VOLT? Calculate the offset value: VALUE1 = RDGN1 – MEAS1 Send the offset value to the TW: CAL{1,2,3}:MEAS:LOC:LOR:VOLT:OFFSET VALUE1 Measure the current offset by sending the following GPIB query and record the return string as MEAS1: MEAS{1,2,3}:CURR? Calculate the offset value:...

  • Page 42: Dc Local High Range Calibration

    CALIBRATION TW SERIES Calculate the gains and offset for the phase being calibrated: GAIN1 = (MEAS1 – MEAS2) / (RDGN1 – RDGN2) GAIN2 = (440.0) / (MEAS1 – MEAS2) OFFSET = GAIN2 * MEAS1 – 220.0 Update the TW calibration registers by sending the following GPIB strings: CAL{1,2,3}:MEAS:LOC:LOR:VOLT:GAIN GAIN2 CAL{1,2,3}:OUTP:LOC:LOR:VOLT:GAIN GAIN1 CAL{1,2,3}:OUTP:LOC:LOR:VOLT:OFFSET OFFSET...
  • Page 43 SERVICE MANUAL CALIBRATION Measure the current offset by sending the following GPIB query and record the return string as MEAS1: MEAS{1,2,3}:CURR? Calculate the offset value: VALUE1 = -1.0 * MEAS1 Send the calculated offset to the TW: CAL{1,2,3}:MEAS:LOC:HIR:CURR:OFFSET VALUE1 Set the TW to 440 volts DC by sending the following GPIB string: SOUR{1,2,3}:VOLT:OFFSET 440 Wait for the DMM to settle.

  • Page 44: Dc Remote Low Range Calibration

    CALIBRATION TW SERIES 3.9 DC REMOTE LOW RANGE CALIBRATION Both the measurement and output subsystems are calibrated at the same time. Connect the DMM to the output phase of the TW to be calibrated. Set the DMM for auto–ranging volts DC. Send the following GPIB commands to the TW: OUTPUT OFF OUTP:COUP DC Wait for the TW to complete its coupling change to DC.

  • Page 45: Dc Remote High Range Calibration

    SERVICE MANUAL CALIBRATION Wait for the DMM to settle. Take a DMM reading and record the value as RDGN1. Query the output voltage of the TW and record the return string as MEAS1: MEAS{1,2,3}:VOLT? Set the TW to -220 volts DC by sending the following GPIB string: SOUR{1,2,3}:VOLT:OFFSET –220 Wait for the DMM to settle.
  • Page 46 CALIBRATION TW SERIES Wait for the DMM to settle and record the value as RDGN1. Send the following query command to the TW and record the return string as MEAS1: MEAS{1,2,3}:VOLT? Calculate the offset value: VALUE1 = RDGN1 – MEAS1 Send the offset value to the TW: CAL{1,2,3}:MEAS:REM:HIR:VOLT:OFFSET VALUE1 Measure the current offset by sending the following GPIB query and record the return...

  • Page 47: Local Low Range Frequency Calibration

    SERVICE MANUAL CALIBRATION Calculate the gains and offset for the phase being calibrated: GAIN1 = (MEAS1 – MEAS2) / (RDGN1 – RDGN2) GAIN2 = (880.0) / (MEAS1 – MEAS2) OFFSET = GAIN2 * MEAS1 – 440.0 Update the TW calibration registers by sending the following GPIB strings: CAL{1,2,3}:MEAS:REM:HIR:VOLT:GAIN GAIN2 CAL{1,2,3}:OUTP:REM:HIR:VOLT:GAIN GAIN1 CAL{1,2,3}:OUTP:REM:HIR:VOLT:OFFSET OFFSET...
  • Page 48 CALIBRATION TW SERIES Set the TW to 320 Hz. SOUR:FREQ 320.0 Wait for the DMM to settle and record the voltage as MEAS4. Set the TW to 500 Hz. SOUR:FREQ 500.0 Wait for the DMM to settle and record the voltage as MEAS5. Set the TW to 60 Hz and open the output relay.
  • Page 49 SERVICE MANUAL CALIBRATION Set the TW’s frequency to 160 Hz with the following GPIB command: SOUR:FREQ 160.0 Wait for the DMM reading to settle and record the value as RDNG3. Query the TW’s output put voltage with the GPIB string below and record this value as MEAS3.

  • Page 50: Local High Range Frequency Calibration

    CALIBRATION TW SERIES 3.12 LOCAL HIGH RANGE FREQUENCY CALIBRATION Connect the TW output to the DMM. Set the DMM up for auto–ranging AC voltage. Set the TW into AC coupling, local sense, 40 Hz, 120V, and high range by sending the following GPIB strings: OUTP:COUP AC SOUR:VOLT:RANGE HIGH...
  • Page 51 SERVICE MANUAL CALIBRATION Calculate the calibration constants: VALUE1 = 240.0 / MEAS1 VALUE2 = 240.0 / MEAS2 VALUE3 = 240.0 / MEAS3 VALUE4 = 240.0 / MEAS4 VALUE5 = 240.0 / MEAS5 Update the local high range frequency calibration of the TW by sending the following GPIB string: CAL{1,2,3}:OUTP:LOC:HIR:VOLT:FREQCAL VALUE1 VALUE2 VALUE3 VALUE4 VALUE5 Close the TW’s output relay:...

  • Page 52: Remote Low Range Frequency Calibration

    CALIBRATION TW SERIES Wait for the DMM reading to settle and record the value as RDNG4. Query the TW’s output put voltage with the GPIB string below and record this value as MEAS4. MEAS{1,2,3}:VOLT? Set the TW’s frequency to 500 Hz with the following GPIB command: SOUR:FREQ 500.0 Wait for the DMM reading to settle and record the value as RDNG5.
  • Page 53 SERVICE MANUAL CALIBRATION Close the TW’s output relay: OUTPUT ON Wait for the DMM to settle and record the voltage as MEAS1. Set the TW to 80 Hz. SOUR:FREQ 80.0 Wait for the DMM to settle and record the voltage as MEAS2. Set the TW to 160 Hz.
  • Page 54 CALIBRATION TW SERIES Close the TW’s output relay: OUTPUT ON Wait for the DMM reading to settle and record the value as RDNG1. Query the TW’s output put voltage with the GPIB string below and record this value as MEAS1. MEAS{1,2,3}:VOLT? Set the TW’s frequency to 80 Hz with the following GPIB command: SOUR:FREQ 80.0...

  • Page 55: Remote High Range Frequency Calibration

    SERVICE MANUAL CALIBRATION Query the TW’s output put voltage with the GPIB string below and record this value as MEAS5. MEAS{1,2,3}:VOLT? Set the TW’s frequency to 60 Hz and open the output with the following GPIB commands: SOUR:FREQ 60.0 OUTP OFF Calculate the measurement system frequency compensation values: VALUE1 = RDGN1 / MEAS1 VALUE2 = RDGN2 / MEAS2...
  • Page 56 CALIBRATION TW SERIES Set the TW to 160 Hz. SOUR:FREQ 160.0 Wait for the DMM to settle and record the voltage as MEAS3. Set the TW to 320 Hz. SOUR:FREQ 320.0 Wait for the DMM to settle and record the voltage as MEAS4. Set the TW to 500 Hz.
  • Page 57 SERVICE MANUAL CALIBRATION Set the TW’s frequency to 80 Hz with the following GPIB command: SOUR:FREQ 80.0 Wait for the DMM reading to settle and record the value as RDNG2. Query the TW’s output put voltage with the GPIB string below and record this value as MEAS2.

  • Page 58: External Phase Reference Calibration

    CALIBRATION TW SERIES Calculate the measurement system frequency compensation values: VALUE1 = RDGN1 / MEAS1 VALUE2 = RDGN2 / MEAS2 VALUE3 = RDGN3 / MEAS3 VALUE4 = RDGN4 / MEAS4 VALUE5 = RDGN5 / MEAS5 Update the TW’s calibration data with the following GPIB command: CAL{1,2,3}:MEAS:REM:HIR:VOLT:FREQCAL VALUE1 VALUE2 VALUE3 VALUE4 VALUE5 3.15 EXTERNAL PHASE REFERENCE CALIBRATION Connect the counter timer channel 1 to the TW’s A phase through a 10:1 resistor...

  • Page 59: Phase A To Phase B Calibration

    SERVICE MANUAL CALIBRATION Wait for the phase angle measurement to stabilize on the counter timer. Record the phase angle as RDGN4. Set the TW frequency to 320 Hz: SOUR:FREQ 320.0 Wait for the phase angle measurement to stabilize on the counter timer. Record the phase angle as RDGN5.
  • Page 60 CALIBRATION TW SERIES Query the TW for the phase angle with the following command and record the value as MEAS1. MEAS2:PHASE? Set the TW frequency to 80 Hz via the GPIB: SOUR:FREQ 80.0 Wait for the counter timer to settle and record the phase angle as RDNG2. Query the TW for the phase angle with the following command and record the value as MEAS2.

  • Page 61: Phase A To Phase C Calibration

    SERVICE MANUAL CALIBRATION Set the TW frequency to 60 Hz and open the output via the GPIB: SOUR:FREQ 60.0 OUTP OFF Calculate the phase offset calibration data: VALUE1 = -1.0 * RDGN1 VALUE2 = -1.0 * RDGN2 VALUE3 = -1.0 * RDGN3 VALUE4 = -1.0 * RDGN4 VALUE5 = -1.0 * RDGN5 Update the calibration data via the GPIB:...
  • Page 62 CALIBRATION TW SERIES Wait for the counter timer to settle and record the phase angle as RDNG1. Query the TW for the phase angle with the following command and record the value as MEAS1. MEAS2:PHASE? Set the TW frequency to 80 Hz via the GPIB: SOUR:FREQ 80.0 Wait for the counter timer to settle and record the phase angle as RDNG2.

  • Page 63: External Gain Control Calibration

    SERVICE MANUAL CALIBRATION Set the TW frequency to 60 Hz and open the output via the GPIB: SOUR:FREQ 60.0 OUTP OFF Calculate the phase offset calibration data: VALUE1 = -1.0 * RDGN1 VALUE2 = -1.0 * RDGN2 VALUE3 = -1.0 * RDGN3 VALUE4 = -1.0 * RDGN4 VALUE5 = -1.0 * RDGN5 Update the calibration data via the GPIB:...

  • Page 64: Low Range Current Calibration

    CALIBRATION TW SERIES Wait for the DMM to settle and record the value as RDNG2. Calculate the gain and offset for the external input: GAIN = 60.0 / ( RDNG2 – RDNG1) OFFSET = 10 – (RDNG2 / (42.0 * GAIN)) Open the output relay and turn off the external gain port with the following GPIB commands: OUTPUT OFF...

  • Page 65: Local Low Range Watts Calibration

    SERVICE MANUAL CALIBRATION Reset the TW back to AC coupling mode, output off. SOUR{1,2,3}:VOLT:OFFSET 0.0 OUTP OFF OUTP:COUP AC Calculate the gain from the collected data: GAIN = (RDGN2 – RDNG1) / (MEAS2 – MEAS1) Update the TW’s gain setting using the GPIB strings below: CAL{1,2,3}:MEAS:LOC:LOR:CURR:GAIN GAIN CAL{1,2,3}:MEAS:REM:LOR:CURR:GAIN GAIN 3.20 LOCAL LOW RANGE WATTS CALIBRATION...

  • Page 66: Remote Low Range Watts Calibration

    CALIBRATION TW SERIES Query the TW’s watts using the GPIB string below, and record this value as MEAS2. MEAS{1,2,3}:POW? Turn the TW’s output off via the GPIB: OUTP OFF Calculate the gain and offset values for updating the TW: GAIN = (RDGN2 – RDGN1)/(MEAS2 – MEAS1) OFFSET = RDGN2 –...

  • Page 67: Low Range Current Frequency Calibration

    SERVICE MANUAL CALIBRATION Turn the TW’s output off via the GPIB: OUTP OFF Calculate the gain and offset values for updating the TW: GAIN = (RDGN2 – RDGN1)/(MEAS2 – MEAS1) OFFSET = RDGN2 – GAIN * MEAS2 Update the TW’s gain and offset calibration values with the following GPIB strings: CAL{1,2,3}:MEAS:REM:LOR:WATT:GAIN GAIN CAL{1,2,3}:MEAS:REM:LOR:WATT:OFFSET GAIN 3.22 LOW RANGE CURRENT FREQUENCY CALIBRATION...
  • Page 68 CALIBRATION TW SERIES Program the TW to 160 Hz using the string below: SOUR{1,2,3}:FREQ 160 Wait until the power analyzer has stabilized and record the current reading as RDNG3. Query the TW’s current using the GPIB string below, and record this value as MEAS3. MEAS{1,2,3}:CURR? Program the TW to 320 Hz using the string below: SOUR{1,2,3}:FREQ 320...

  • Page 69: Local Low Range Watts Frequency Calibration

    SERVICE MANUAL CALIBRATION 3.23 LOCAL LOW RANGE WATTS FREQUENCY CALIBRATION Connect the 12 ohm resistor to the output of the TW through the power analyzer. Set up the power analyzer to measure watts. Set up the TW to AC coupling, low range, local sense, 40 Hz, 13 ampere current limit, output relay closed and 120 volts with the following GPIB programming strings: OUTP:COUP AC SOUR:VOLT:RANGE LOW...

  • Page 70: Remote Low Range Watts Frequency Calibration

    CALIBRATION TW SERIES Query the TW’s watts using the GPIB string below, and record this value as MEAS4. MEAS{1,2,3}:POW? Program the TW to 500 Hz using the string below: SOUR{1,2,3}:FREQ 500 Wait until the power analyzer has stabilized and record the watts reading as RDNG5. Query the TW’s watts using the GPIB string below, and record this value as MEAS5.
  • Page 71 SERVICE MANUAL CALIBRATION Query the TW’s watts using the GPIB string below, and record this value as MEAS1. MEAS{1,2,3}:POW? Program the TW to 80 Hz using the string below: SOUR{1,2,3}:FREQ 80 Wait until the power analyzer has stabilized and record the watts reading as RDNG2. Query the TW’s watts using the GPIB string below, and record this value as MEAS2.

  • Page 72: High Range Current Calibration

    CALIBRATION TW SERIES Calculate the calibration constants: VALUE1 = RDGN1/MEAS1 VALUE2 = RDGN2/MEAS2 VALUE3 = RDGN3/MEAS3 VALUE4 = RDGN4/MEAS4 VALUE5 = RDGN5/MEAS5 Update the TW’s calibration data: CAL{1,2,3}:MEAS:REM:LOR:WATT:FREQCAL VALUE1 VALUE2 VALUE3 VALUE4 VALUE5 3.25 HIGH RANGE CURRENT CALIBRATION Connect the 48 ohm resistor to the output of the TW through the power analyzer. Set up the power analyzer to measure current.

  • Page 73: Local High Range Watts Calibration

    SERVICE MANUAL CALIBRATION Calculate the gain from the collected data: GAIN = (RDGN2 – RDNG1) / (MEAS2 – MEAS1) Update the TW’s gain setting using the GPIB strings below: CAL{1,2,3}:MEAS:LOC:HIR:CURR:GAIN GAIN CAL{1,2,3}:MEAS:REM:HIR:CURR:GAIN GAIN 3.26 LOCAL HIGH RANGE WATTS CALIBRATION Connect the 48 ohm resistor to the output of the TW through the power analyzer. Set up the power analyzer to measure watts.

  • Page 74: Remote High Range Watts Calibration

    CALIBRATION TW SERIES Update the TW’s gain and offset calibration values with the following GPIB strings: CAL{1,2,3}:MEAS:LOC:HIR:WATT:GAIN GAIN CAL{1,2,3}:MEAS:LOC:HIR:WATT:OFFSET GAIN 3.27 REMOTE HIGH RANGE WATTS CALIBRATION Connect the 48 ohm resistor to the output of the TW through the power analyzer. Set up the power analyzer to measure watts.

  • Page 75: High Range Current Frequency Calibration

    SERVICE MANUAL CALIBRATION 3.28 HIGH RANGE CURRENT FREQUENCY CALIBRATION Connect the 48 ohm resistor to the output of the TW through the power analyzer. Set up the power analyzer to measure current. Set up the TW to AC coupling, low range, remote sense, 40 Hz, 6.5 ampere current limit, output relay closed and 240 volts with the following GPIB programming strings: OUTP:COUP AC SOUR:VOLT:RANGE HIGH...

  • Page 76: Local High Range Watts Frequency Calibration

    CALIBRATION TW SERIES Query the TW’s current using the GPIB string below, and record this value as MEAS4. MEAS{1,2,3}:CURR? Program the TW to 500 Hz using the string below: SOUR{1,2,3}:FREQ 500 Wait until the power analyzer has stabilized and record the current reading as RDNG5. Query the TW’s current using the GPIB string below, and record this value as MEAS5.
  • Page 77 SERVICE MANUAL CALIBRATION Wait until the power analyzer has stabilized and record the watts reading as RDNG1. Query the TW’s watts using the GPIB string below, and record this value as MEAS1. MEAS{1,2,3}:POW? Program the TW to 80 Hz using the string below: SOUR{1,2,3}:FREQ 80 Wait until the power analyzer has stabilized and record the watts reading as RDNG2.

  • Page 78: Remote High Range Watts Frequency Calibration

    CALIBRATION TW SERIES Calculate the calibration constants: VALUE1 = RDGN1/MEAS1 VALUE2 = RDGN2/MEAS2 VALUE3 = RDGN3/MEAS3 VALUE4 = RDGN4/MEAS4 VALUE5 = RDGN5/MEAS5 Update the TW’s calibration data: CAL{1,2,3}:MEAS:LOC:HIR:WATT:FREQCAL VALUE1 VALUE2 VALUE3 VALUE4 VALUE5 3.30 REMOTE HIGH RANGE WATTS FREQUENCY CALIBRATION Connect the 48 ohm resistor to the output of the TW through the power analyzer.
  • Page 79 SERVICE MANUAL CALIBRATION Wait until the power analyzer has stabilized and record the watts reading as RDNG3. Query the TW’s watts using the GPIB string below, and record this value as MEAS3. MEAS{1,2,3}:POW? Program the TW to 320 Hz using the string below: SOUR{1,2,3}:FREQ 320 Wait until the power analyzer has stabilized and record the watts reading as RDNG4.
  • Page 80 CALIBRATION TW SERIES This page intentionally left blank. 3-44...

  • Page 81: Section 4 - Parts List

    SECTION 4 – PARTS LIST 4.1 GENERAL This section contains the top assembly parts list for the TrueWave products. The parts lists below directly correlate to the diagrams in Section 5 of this manual. 4.2 PARTS LIST Number Assembly Name 5161469-01 FINAL ASSEMBLY, TW1750-1 5161469-02...

  • Page 82: Parts List

    PARTS LIST TW SERIES 4.3 ORDERING SPARE PARTS Contact Elgar Electronics Corporation to order spare parts or assemblies. Please specify the assembly number, instrument name, and instrument series number when ordering. Elgar Electronics Corporation 9250 Brown Deer Road San Diego, CA 92121-2294 1-800-733-5427 Tel: (858) 450-0085 Fax: (858) 458-0267...

  • Page 83: Section 5 - Diagrams

    SECTION 5 – DIAGRAMS 5.1 GENERAL This section contains the interconnect diagrams and top assembly diagrams for the TrueWave series. The interconnect diagrams can be used to understand the theory of operation and as an aid in troubleshooting the unit. 5.2 DIAGRAMS Table 5-1 lists the diagrams included in this section.
  • Page 84 DIAGRAMS TW SERIES This page intentionally left blank. Via Acquanera, 29 22100 Como tel. 031.526.566 (r.a.) fax 031.507.984 info@calpower.it www.calpower.it...

This manual is also suitable for:

Truewave tw3500Truewave tw1750

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