AMETEK XHR 1000 Watt Series - Manual (Page 81)

Calibration
Calibrating for Readback Accuracy
81
Output
Voltage
Monitor
Circuit
Calibration
1. Ensure that the power supply is turned OFF. Disconnect any load.
2. Connect a DVM across the power supply output to read the output voltage.
3. Connect a second DVM to the rear panel J2 terminals 9 (output voltage monitor)
and 6 (program/monitor signal return). See notes below.
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 potentiometer (R78) until the monitor
DVM reads 1% of the readback scale. (50 mVdc for 0-5 Vdc readback or
100 mVdc for 0-10 Vdc readback.)
7. Set the power supply output voltage to the model-rated maximum output.
8. Adjust the output voltage monitor range potentiometer (R99) until the monitor
DVM reads 100% of the readback scale. (5 Vdc for 0-5 Vdc readback or 10 Vdc
for 0-10 Vdc readback.)
Repeat this adjustment until the monitor signal is within the product specifications
as found in Section 1, or to the accuracy that your application requires.
Notes:
• The recommended accuracy rating for the DVMs is four times better than your
desired readback accuracy.
• Depending on the readback accuracy required in your application, you may use
the front panel voltmeter in place of the meter used to monitor the output of the
supply.