AMETEK XHR 1000 Watt Series - Manual (Page 79)

Calibration
Calibrating for Programming Accuracy
79
Voltage
Programming
Circuit
Calibration
1. Ensure that the power supply is turned OFF. Disconnect any load.
2. Connect the programming source between J2 terminals 7 (output voltage
programming input) and 6 (program/monitor signal return).
3. Connect the DVM to the power supply output.
4. Turn the power supply ON.
5. Apply 1% of program voltage.
6. Adjust the voltage program offset potentiometer (R72) until the DVM reads 1%
of the model-rated output voltage.
7. Apply 100% of program voltage.
8. Adjust the voltage program scale potentiometer (R96) until the DVM reads
100% of the model-rated output voltage.
Repeat this adjustment until output levels are within the product specifications as
found in Section 1, or to the accuracy that your application requires.
Current
Programming
Circuit
Calibration
1. Ensure that the power supply is turned OFF. Disconnect any load.
2. Connect the program source between J2 connector terminals 8 (output current
limit programming input) and 6 (program/monitor signal return).
3. Connect the shunt and DVM across the power supply output. See note below.
4. Turn the power supply ON.
5. Apply 1% of program voltage.
6. Adjust the current program offset potentiometer (R75) until the DVM indicates
1% of the model-rated output current. See note below.
7. Apply 100% of program voltage.
8. Adjust the current program scale potentiometer (R98) until the DVM indicates
100% of the model-rated output current. See note below.
Repeat this adjustment until output levels are adjusted to power supply specifications
as found in Section 1, or to the accuracy your application requires.
Notes:
• The DC shunt-DVM combination must be rated better than 0.5% accuracy.
• Calculate the required DVM reading using I = V/R, where I is the current, V is
the DVM reading, and R is the DC shunt resistance.