Ametek SEQUOIA Series - Page 305

Sequoia / Tahoe Series User Manual California Instruments
282 M447352-01 REV-A
5. Reset low-range offset alignment with the SCPI command, CAL:MEAS:CURR:DC:LROF 0.
6. Measure the output current with the SCPI command, MEAS:CURR:DC?.
7. Perform the alignment with the SCPI command, CAL:MEAS:CURR:DC:LROF <numeric value>.
The numeric value is the output current returned by the command MEAS:CURR:DC?. Enter
successive values from MEAS:CURR:DC? Until the alignment gives a value of ≤ 1 mA(DC).
8. Send the SCPI query command, *OPC?, after each numeric value entry to determine when this
alignment has been completed. Ensure alignment has been completed (query returns a 1) before
continuing.
9. Send the SCPI command, INST:NSEL 2, and repeat Step-4 through Step-8 to align Phase-B.
10. Send the SCPI command, INST:NSEL 3, and repeat Step-4 through Step-8 to align Phase-C.
9.2.18 Output Current Measurement High-Range Offset Alignment, DC-Mode
1. Ensure that there is no load connected to the output of the power source.
2. Enter the calibration password with the SCPI command, CAL:PASS “5000”.
3. Send the following SCPI command to select Phase-A:
INST:NSEL 1
4. Send the following SCPI commands to the power source (440 VDC range selected; ALC off):
OUTP 0
CURR:PROT OFF
MODE DC
VOLT:RANGE 440
VOLT 0
VOLT:ALC OFF
OUTP 1
5. Reset high-range offset alignment with the SCPI command, CAL:MEAS:CURR:DC:HROF 0.
6. Measure the output current with the SCPI command, MEAS:CURR:DC?.
7. Perform the alignment with the SCPI command, CAL:MEAS:CURR:DC:HROF <numeric value>.
The numeric value is the output current returned by the command MEAS:CURR:DC?. Enter
successive values from MEAS:CURR? Until the alignment gives a value of ≤ 1 mA(DC).
8. Send the SCPI query command, *OPC?, after each numeric value entry to determine when this
alignment has been completed. Ensure alignment has been completed (query returns a 1) before
continuing.
9. Send the SCPI command, INST:NSEL 2, and repeat Step-4 through Step-8 to align Phase-B.
10. Send the SCPI command, INST:NSEL 3, and repeat Step-4 through Step-8 to align Phase-C.
9.2.19 Output Phase-A Alignment, Output Relative to External SYNC
1. Connect a function generator to External Input/Output Control connector Pin-2 (SYNC_HIGH)
and Pin-3 (SYNC_LOW); refer to Section 3.8.3. Set the function generator to produce a pulse
train with an output frequency of 16 Hz and an amplitude switching between 0 V and 5 V.
2. Set up the phase meter to make phase measurements of the power supply output relative to the
External SYNC signal as a reference. Connect one input of the phase meter to the function