Xantrex Technology XTR 850 Watt - Manual (Page 195)

Calibration and Troubleshooting
975-0200-01-01 6-7
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After performing offset calibration, it is highly recommended that you
repeat gain calibration.
SCPI Command
[:] CALibration[<channel>]:OUTPut:CURRent{<ammeter
reading in amps>}
Over Voltage Protection Calibration
To calibrate the over voltage protection:
1. Turn the power supply to On.
2. Set the output voltage to 90% of the maximum APG level value. See
“Voltage-Controlled Voltage APG Setup” on page 4–10 for setting the
APG level if the level is not in the correct range for your source.
3. Turn on the main power output.
4. Calculate the expected output based on the input. The following
equation will indicate the expected output:
(V
analog in
/V
APG Level
)*V
Volt Model
= V
expected
5. Execute the OVP calibration SCPI command:
:CAL:PROT <expected output value>.
6. The power supply will enter into self-calibration mode. The output
voltage display reads OVPC and the voltage will increment in the
output current display. After several seconds, the voltage will trip
over voltage protection.
7. Turn the power supply OFF.
Calibration of the power supply is completed.
The SCPI command (s) for these instructions are:
[:]CALibration[:VOLTage]:PROTection[:OVER]
{<expected output value>}
Important: For best results, both calibrations may be repeated several times.
Important: The output (main) voltage must be precalibrated.