Ametek SEQUOIA Series - Page 320

Sequoia / Tahoe Series User Manual California Instruments
M447352-01 REV-A 297
VOLT:ALC OFF
MODE DC
VOLT:RANGE 22s0
SYNC:VOLT 200
CURR 0
6. Perform the synchronization procedure section 9.3.3 and enable the output of Sequoia unit using
command OUTP 1.
7. Perform the alignment with the SCPI command, CAL:VOLT:DC:ZERO <numeric value>. Start
with a value of zero and increase or decrease for the lowest DC output current reading of the
selected phase within the range of 0  100 mA. The maximum range of this alignment is ±2000.
8. Send the SCPI command, INST:NSEL 2, and repeat Step-5 through Step-7 to align Phase-B.
9. Send the SCPI command, INST:NSEL 3, and repeat Step-5 through Step-7 to align Phase-C.
9.3.7 Current Gain Initial Alignment, AC-Mode, and DC-Mode
1. Set Voltage Source (connected at Sequoia unit load side) Mode AC, voltage to 150V, frequency
60Hz, and current maximum limit (should be greater than the Sequoia unit 80% of the AC Low
range rated current).
2. With the Power Analyzer, monitor the current at the Sequoia unit output.
3. Enter the calibration password with the SCPI command, CAL:PASS “5000”.
4. Current Gain Initial Alignment, AC-Mode: Send the following SCPI commands to the power
source (166 VAC range selected; ALC off):
CURR:ALC OFF
MODE AC
VOLT:RANGE 166
SYNC:VOLT 150
SYNC:FREQ 60
CURR:PHASE 0
CURR <80% of the rated current>
5. Perform the synchronization procedure section 9.3.2 and enable the output of Sequoia unit using
command OUTP 1.
6. Send the following SCPI command to select Phase-A:
INST:NSEL 1
7. Verify the existing calibration coefficient by CAL:CURR:FSC?.
8. Perform the alignment by adjusting the output current of the selected phase to 80% of the rated
current ±0.2% FSC as indicated on the Power Analyzer by using the SCPI command,
CAL:CURR:FSC <numeric value> to increase or decrease the value.
9. Send the SCPI command, INST:NSEL 2, and repeat Step-7 and Step-8 to align Phase-B.
10. Send the SCPI command, INST:NSEL 3, and repeat Step-7 and Step-8 to align Phase-C.
11. Current Gain Initial Alignment, DC-Mode: