Calibrating For Readback Accuracy; Output Voltage Monitor Circuit Calibration - Xantrex XFR 2800 Operating Manual

Calibration

Calibrating for Readback Accuracy

Calibrating for Readback Accuracy
The factory calibrates the offset and range of the output voltage and current monitor
circuits to within 1% for the default 0-10 Vdc scales. You may need to recalibrate
when you select the 0-5 Vdc scale or when you switch back to the 0-10 Vdc scale
after previously calibrating for 0-5 Vdc operation.
See Section for instructions to remove the cover and any option card. Follow all
procedure steps in the sequence given.
Output 1. Ensure that the power supply is turned OFF. Disconnect any load.
Voltage
2. Set SW1 switch 5 OPEN to select 0-5 V output voltage monitor range, CLOSED
Monitor
Circuit
3. Connect a DVM across the power supply output to read the output voltage.
Calibration
4. Turn the power supply ON.
5. Set the power supply output voltage to 1% of the model-rated output.
6. Adjust the output voltage monitor offset (R397) until the monitor DVM reads
7. Set the power supply output voltage to the model-rated maximum.
8. Adjust the output voltage monitor range (R387) until the monitor DVM reads
Repeat this procedure until the monitor signal is adjusted to power supply
specifications (see Section 1) or to the accuracy that your application requires.
84
for 0-10 V.
Connect a second DVM between the rear panel J2 connector terminals 10
(output voltage monitor) and 9 (voltage monitor signal return).
1% of the readback scale. (50 mVdc for 0-5 V readback or 100 mVdc for
0-10 Vdc readback.)
100% of the readback scale. (5 Vdc for 0-5 V readback or 10 Vdc for 0-10 Vdc
readback.)
Operating Manual for XFR 2.8kW Series Power Supply