Sequoia / Tahoe Series User Manual California Instruments
M447352-01 REV-A 301
CURR:REF RPV
INST:COUP NONE
5. Perform the synchronization procedure section 9.3.2 and enable the output of Sequoia unit using
command OUTP 1.
6. Enter the calibration password with the SCPI command, CAL:PASS “5000”.
7. DC Offset alignment, low-range AC output (166 VAC):
8. Send the SCPI command, INST:NSEL 1, to select Phase-A.
9. 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.
10. Send the SCPI command, INST:NSEL 2, and repeat Step-9 to align Phase-B.
11. Send the SCPI command, INST:NSEL 3, and repeat Step-9 to align Phase-C.
12. AC Gain alignment, low-range AC output (166 VAC):
13. Send the SCPI command, INST:NSEL 1, to select Phase-A.
14. Apply an external programming DC voltage of 10.0 VDC, ± 0.005 V.
15. Measure the output current of Phase A with an external meter (Power Analyzer), and verify the
measured output current is 100% of full-scale current ±2% FSC.
16. If not Send the command CAL:SOUR:EXT:FSC < numerical value> . to adjust the output current
by reducing or increasing the numerical value. (Where numeric value can be up to 0 to 4095).
17. Send the SCPI command, INST:NSEL 2, and repeat Step-14 and Step-16 to align Phase-B.
18. Send the SCPI command, INST:NSEL 3, and repeat Step-14 and Step-16 to align Phase-C.
19. ADC-RMS Full-Scale alignment, high-range AC output (166 VAC):
20. Send the SCPI command, INST:NSEL 1, to select Phase-A.
21. Apply an external programming DC voltage of 10.0 VDC, ± 0.005 V.
22. Perform the ADC RMS gain alignment with the SCPI command, CAL:MEAS:EXT:FSC <100% of
Full-Scale Current>. 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:CURR:EXT?, and ensure that the returned output current is 100% of full-scale
current ±1A.
23. Send the SCPI command, INST:NSEL 2, and repeat Step-21 and Step-22 to align Phase-B.
24. Send the SCPI command, INST:NSEL 3, and repeat Step-21 and Step-22 to align Phase-C.
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