Ametek SEQUOIA Series - Page 311

Sequoia / Tahoe Series User Manual California Instruments
288 M447352-01 REV-A
1. Connect the signal inputs for Phase-A (Pin-1), Phase-B (Pin-2), and Phase-C (Pin-3) together for
connection to the same function generator output in Step-2.
2. Connect a DC reference voltage to external Analog Control signal connector Pin-1, Pin-2 and
Pin-3 (signal) and Pin-4 (signal return (refer to Section 3.8.4).
3. Send the following SCPI commands to the power source (400 VAC range selected; ALC off; do
not turn on the output at this time):
INST:COUP ALL
OUTP 0
MODE AC
VOLT:RANG 333
FREQ 60
VOLT:ALC OFF
VOLT:REF RPV
INST:COUP NONE
4. Enter the calibration password with the SCPI command, CAL:PASS “5000”.
5. DC Offset alignment, high-range AC output (333 VAC):
6. Send the SCPI command, INST:NSEL 1, to select Phase-A.
7. Perform the DC offset alignment with the SCPI command, CAL:MEAS:EXT:OFFS:DC 0, with the
output off and the external analog input at 0 VDC. Send the SCPI query command, *OPC?, to
determine when this alignment step has been completed; the query will return a 1 to indicate
completion. Ensure alignment has been completed (query returns a 1) before continuing.
8. Send the SCPI command, INST:NSEL 2, and repeat Step-7 to align Phase-B.
9. Send the SCPI command, INST:NSEL 3, and repeat Step-7 to align Phase-C.
10. AC Gain alignment, high-range AC output (333 VAC):
11. Send the SCPI command, INST:NSEL 1, to select Phase-A.
12. Apply an external programming DC voltage of 10.0 VDC, ± 0.005 V.
13. Perform the output voltage AC gain alignment with the SCPI command, CAL:SOUR:EXT:FSC
<numeric value>. The numeric value is in the range of 0 to 4095. Start with a value of 1000;
increasing the value would increase the output voltage. Turn on the output with the SCPI
command, OUTP 1. Adjust the numeric value for the closest setting producing an output voltage
of 333 V(RMS).
14. Send the SCPI command, INST:NSEL 2, and repeat Step-12 and Step-13 to align Phase-B.
15. Send the SCPI command, INST:NSEL 3, and repeat Step-12 and Step-13 to align Phase-C.
16. ADC-RMS Full-Scale alignment, high-range AC output (333 VAC):
17. Send the SCPI command, INST:NSEL 1, to select Phase-A.
18. Apply an external programming DC voltage of 10.0 VDC, ± 0.005 V.
19. Perform the ADC RMS gain alignment with the SCPI command, CAL:MEAS:EXT:FSC 333. Send
the SCPI query command, *OPC?, to determine when this alignment step has been completed;
the query will return a 1 to indicate completion. Ensure alignment has been completed (query
returns a 1) before continuing. Verify the measurement with the SCPI command,
MEAS:VOLT:EXT?, and ensure that the returned output voltage value, 333 V(RMS), is within
specification limits.