Sequoia / Tahoe Series User Manual California Instruments
290 M447352-01 REV-A
OUTP 0
VOLT:ALC ON
MODE AC
VOLT:RANG 440
VOLT 440
FREQ 60
OUTP 1
15. Perform the adjustment using the command CAL:MON:VOLT:FSC <numeric value>. The
numeric value is in the range of 0 to 255. Adjust until the phase A voltage monitor output reading
is 7.07V(RMS) +/-10mV, where the output voltage is 440V.
16. Send the SCPI command, INST:NSEL 2, and repeat Step-15 through Step-16 to align Phase-B.
17. Send the SCPI command, INST:NSEL 3, and repeat Step-15 through Step-16 to align Phase-C.
9.2.26 Alignment of Output Voltage Monitor, AC output
The Isolated Output Voltage Monitor for getting the scaled-down output voltage is available in the rear
panel external analog control signal connector: Phase-A Voltage monitor (VMON) signal output will be
obtained at Pin-11; Phase-B Voltage monitor signal input at Pin-12; Phase-C voltage signal input at Pin-
13; signal return at Pin-14 (refer to Section 3.8.4). The alignment is performed for 0V to the full-scale output
voltage (166 or 333 volts in AC) for 0-7.07V(RMS) monitor signal range.
1. Ensure that there is no load connected to the output of the power source.
2. With the external DVM set for AC, monitor the output voltage monitor (VMON) signal at the
external analog control signal connector pin (Pin-11 for Phase A, Pin-12 for Phase B, and Pin 13
for Phase C) with respect to Pin-14.
3. Enter the calibration password with the SCPI command, CAL:PASS “5000”.
4. Send the following SCPI command to select Phase-A:
INST:NSEL 1
5. Send the following SCPI commands to the power source (166 VAC range selected; ALC ON):
VOLT:ALC ON
MODE AC
VOLT:RANG 166
VOLT 166
FREQ 60
OUTP 1
6. Perform the adjustment using the command CAL:MON:VOLT:FSC <numeric value>. The
numeric value is in the range of 0 to 255. Adjust until the phase A voltage monitor output reading
is 7.07V(RMS) +/-10mV, where the output voltage is 166V.
7. Send the SCPI command, INST:NSEL 2, and repeat Step-2 through Step-6 to align Phase-B.
8. Send the SCPI command, INST:NSEL 3, and repeat Step-2 through Step-6 to align Phase-C.
9. Send the following SCPI command to select Phase-A:
INST:NSEL 1
To Next Page
Loading...
