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. 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.
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. From bench top supplies to rack-mounted industrial power subsystems, AMETEK Programmable Power is the proud manufacturer of Elgar, Sorensen, California Instruments and Power Ten brand power supplies.
This page intentionally left blank.
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. The equipment used contains ESD sensitive ports. When installing equipment, follow ESD Safety Procedures.
Product Family: Models: TW5250, TW3500, TW1750 Warranty Period: One Year WARRANTY TERMS AMETEK Programmable Power, Inc.
TABLE OF CONTENTS Warranty......................................................................................................................... i Safety Notice.................................................................................................................iii Safety Symbols ............................................................................................................ iv SECTION 1 – THEORY OF OPERATION 1.1 INTRODUCTION.......................................................
TABLE OF CONTENTS TW SERIES SECTION 3 – CALIBRATION 3.1 SCOPE............................................................................................................. 3-1 3.2 APPLICABLE DOCUMENTS ........................................................................... 3-1 3.3 REQUIRED TEST EQUIPMENT...................................................................... 3-1 3.4 SETUP .............................................................................................................
SERVICE MANUAL TABLE OF CONTENTS SECTION 4 – PARTS LIST 4.1 GENERAL ........................................................................................................4-1 4.2 PARTS LIST .....................................................................................................4-1 4.3 ORDERING SPARE PARTS ............................................................................4-2 SECTION 5 – DIAGRAMS 5.1 GENERAL .....................................................................
TABLE OF CONTENTS TW SERIES This page intentionally left blank.
SECTION 1 – THEORY OF OPERATION 1.1 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. For this reason, only qualified personnel should attempt to troubleshoot and repair TrueWave products.
1-2 • • INPUT FILTER +290VDC BUS -290VDC BUS • • • FIGURE 1-1.
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).
THEORY OF OPERATION 1.4 TW SERIES DIGITAL CONTROL BOARD KEYPAD SYSTEM MEMORY DISPLAY GPIB MC68332 PROCESSOR QSPI Analog Processor 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. It consists of the following interfaces: • Front panel keypad and display elements • GPIB (IEEE 488.
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. Upon power-up of the TW system, the Digital Control Board performs the following functions: • Initializes all chip selects, PortE and PortF of the 68332 processor.
THEORY OF OPERATION 1.5 TW SERIES ANALOG PROCESSOR BOARD Digital Control Board QSPI POWER SUPPLY TMS320C50 PROCESSOR WAVEFORM DACs 8 CHANNEL ADC VOLTAGE DAC SERVO AMPLIFIERS POWER AMPLIFIERS 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.
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. Phases B and C have a mux that selects between the output of their respective servo amplifiers or phase A’s servo amplifier.
THEORY OF OPERATION 1.7 TW SERIES POWER CONDITIONER MODULE POWER 3 Phase AC Input +48VDC PFC Input Stage +290VDC DC/DC Converter Front Panel On/Off Switch HSKP Rectifier Input Stage -290VDC Amplifier 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. This is accomplished in two separate stages of the power module.
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.
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.
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. TW systems are delivered with all adjustments and calibrations completed.
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) Fluke 8012A Oscilloscope Tektronix Model 2232 Computer with IEEE-488.2 Interface Any TABLE 2-1.
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.
MAINTENANCE AND TROUBLESHOOTING TW SERIES TABLE 2-3. TROUBLESHOOTING Fault Symptom Troubleshooting / Corrective Action • Check for proper input voltage to TW unit. Correct the input voltage as necessary. • De-energized unit, check and replace input fuses as necessary. Re-energize unit and test. If fuses open a second time, deenergize unit and perform disassembly steps 2.6.1 thru 2.6.12, replacing the power modules of the phases with the open fuses.
SERVICE MANUAL MAINTENANCE AND TROUBLESHOOTING Fault Symptom Unit comes up normally. Upon relay closure unit display “PS FAULT 1” indicating that a redundant overvoltage has occurred. Troubleshooting / Corrective Action • Check external sense and power lead wiring. • If problem persists, de-energize unit and perform disassembly steps 2.6.1 to 2.6.9. Inspect the 5161489-01 cable for proper installation. Re- assemble unit and test.
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. The front panel will still be connected to the unit by several ribbon cables. Extreme care must be taken not to damage these cables.
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.
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. 2.6.6 Slightly separate the ‘Power On’ switch end of the front panel from the chassis as shown above.
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. The front panel assembly can now be completely removed. The Housekeeping board can also be removed, if necessary, by disconnecting the cables to J3, J7A, and J28B and then removing the (7) screws securing the board to the chassis.
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.
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. (The bottom screw mechanism wraps around the edge of the air baffle and, thus, does not need to be removed.
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.
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.
MAINTENANCE AND TROUBLESHOOTING TW SERIES 2.6.17 Remove the air baffle by lifting straight out as shown above. 2.6.
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). When removing the rear panel assembly from the chassis, extreme care must be taken not to damage any of the ribbon cable assemblies connected to the rear panel assembly.
MAINTENANCE AND TROUBLESHOOTING This page intentionally left blank.
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. 3.2 APPLICABLE DOCUMENTS TrueWave Operating Manual: TrueWave SCPI Specification: Elgar Document No.
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. Connect the appropriate input power to the TrueWave. Once power is applied, the TrueWave system can be powered up by turning on the switch located on the front panel.
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.
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. Record the DMM reading as RDNG 2. Calculate the required offset DAC setting.
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: VALUE1 = -1.
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 Reset the TW’s output to a safe condition: SOUR{1,2,3}:VOLT:OFFSET 0.0 OUTPUT OFF 3.
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. Take a DMM reading and record the value as RDGN1.
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. Continue with the following GPIB command: SOUR:VOLT:RANGE LOW SOUR:SENSE REMOTE SOUR{1,2,3}:CURR 5.00 OUTPUT ON SOUR{1,2,3}:VOLT:OFFSET 0.
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. Take a DMM reading and record the value as RDGN2.
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 string as MEAS1: MEAS{1,2,3}:CURR? Calculate the offset value: VALUE1 = -1.
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 Reset the TW’s output to a safe condition: SOUR{1,2,3}:VOLT:OFFSET 0.0 OUTPUT OFF 3.
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. SOUR:FREQ 60.0 OUTPUT OFF Calculate the calibration constants: VALUE1 = 120.0 / MEAS1 VALUE2 = 120.0 / MEAS2 VALUE3 = 120.0 / MEAS3 VALUE4 = 120.0 / MEAS4 VALUE5 = 120.
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. MEAS{1,2,3}:VOLT? Set the TW’s frequency to 320 Hz with the following GPIB command: SOUR:FREQ 320.0 Wait for the DMM reading to settle and record the value as RDNG4.
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 SOUR:SENSE LOCAL SOUR:FREQ 40.0 SOUR{1,2,3}:VOLT 240.00 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.
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: OUTPUT ON Wait for the DMM reading to settle and record the value as RDNG1.
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. Query the TW’s output put voltage with the GPIB string below and record this value as MEAS5.
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. 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. SOUR:FREQ 500.
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 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.
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.
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. 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. SOUR:FREQ 80.0 OUTPUT OFF Calculate the calibration constants: VALUE1 = 240.0 / MEAS1 VALUE2 = 240.0 / MEAS2 VALUE3 = 240.0 / MEAS3 VALUE4 = 240.
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. MEAS{1,2,3}:VOLT? 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.
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 divider.
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. Set the TW frequency to 60 Hz and output off: SOUR:FREQ 60.0 OUTP OFF Calculate the phase angle compensation values: VALUE1 = -1.0 * RDGN1 VALUE2 = -1.0 * RDGN2 VALUE3 = -1.0 * RDGN3 VALUE4 = -1.0 * RDGN4 VALUE5 = -1.
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. MEAS2:PHASE? Set the TW frequency to 160 Hz via the GPIB: SOUR:FREQ 160.0 Wait for the counter timer to settle and record the phase angle as RDNG3.
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: CAL:UNIQ:OPHAB VALUE1 VALUE2 VALUE3 VALUE4 VALUE5 Calculate the phase angle readback calibration data: VALUE1 = -1.0 * (RDGN1 + MEAS1) VALUE2 = -1.0 * (RDGN2 + MEAS2) VALUE3 = -1.
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. Query the TW for the phase angle with the following command and record the value as MEAS2. MEAS2:PHASE? Set the TW frequency to 160 Hz via the GPIB: SOUR:FREQ 160.
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: CAL:UNIQ:OPHAC VALUE1 VALUE2 VALUE3 VALUE4 VALUE5 Calculate the phase angle readback calibration data: VALUE1 = -1.0 * (RDGN1 + MEAS1) VALUE2 = -1.0 * (RDGN2 + MEAS2) VALUE3 = -1.
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 SYST:EXT:GAIN 0 Send the updated calibration constants to the TW with the following GPIB strings: CAL:UNIQ:GEXTG GAIN CAL:UNIQ:OEXTG OFFSET 3.
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 Connect the 12 ohm resistor to the output of the TW through the power analyzer.
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 – GAIN * MEAS2 Update the TW’s gain and offset calibration values with the following GPIB strings: CAL{1,2,3}:MEAS:LOC:LOR:WATT:GAIN GAIN CAL{1,2,3}:MEAS:LOC:LOR:WATT:OFFSET GAIN 3.
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 Connect the 12 ohm resistor to the output of the TW through the power analyzer.
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 Wait until the power analyzer has stabilized and record the current reading as RDNG4.
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 SOUR:SENSE LOCAL SOUR:FREQ 40 SOUR{1,2,3}:CURR 13.
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.
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.
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. Set up the TW to DC coupling, high range, local sense, 6.
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. Set up the TW to AC coupling, high range, local sense, 6.
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. Set up the TW to AC coupling, high range, local sense, 6.
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 SOUR:SENSE REMOTE SOUR:FREQ 40 SOUR{1,2,3}:CURR 6.
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.
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. Query the TW’s watts using the GPIB string below, and record this value as MEAS2.
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. Set up the power analyzer to measure watts.
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. Query the TW’s watts using the GPIB string below, and record this value as MEAS4.
CALIBRATION TW SERIES This page intentionally left blank.
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.
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 www.elgar.
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. Number Drawing Title Sheet 6161469 INTERCONNECT DIAGRAM, SYSTEM, TRUEWAVE 1 of 2 5161469 FINAL ASSEMBLY, TRUEWAVE 1 of 8 TABLE 5-1.
DIAGRAMS TW SERIES This page intentionally left blank.
