Xantrex XTR 33-25, Operating Manual

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Calibration and Troubleshooting
M370046-01 6-23
6
4. Type SCPI input Voltage calibration command with voltage noted in
step 3 as the parameter “data”.
For example, you would type
:CAL:INP:ANAL:CURR 0.43
if
you read 0.43 volts from the voltmeter.
After performing offset calibration, it is highly recommended that you
repeat gain calibration.
SCPI Command
[:]
CALibration[<channel>]:INPut:ANALog[:VOLTage]
{<voltmeter reading in volts>}
Calibrating the Input Current APG Signal
The input voltage APG calibration is necessary to ensure accurate
measurements when using the
:MEAS:APR?
and
:MEAS:APR:ISOL?
SCPI command queries to monitor the APG input signal.
Gain Calibration
To calibrate the CAP APG input gain calibration:
1. Connect a short across the power supply output.
2. Connect a voltmeter and a DC voltage source to the non-isolated
current APG input lines (J1.10 and J1.7).
3. Turn the power supply On.
4. Set the Current APG level to 4 V. Send the SCPI command:
SYST:COMM:APR:LEV:CURR 4
5. Set the input source as Voltage analog APG. Send the SCPI
command:
SYST:REM:SOUR:CURR AVOL
6. Set the voltage source attached to the non-isolated current APG input
to 90% of the nominal current level, in this case 3.6 V.
7. Turn the output power on.
8. The power supply starts up in Constant Current mode.
9. Read the input voltage value from the voltmeter connected in step 2.
10. Type the SCPI input current calibration command with voltage noted
in step 9 as the parameter “data”.
For example, you would type :CAL:INP:ANAL:CURR 3.49 if you
were reading 3.49 volts from the voltmeter.
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