AMETEK XHR 1000 Watt Series - Manual (Page 38)

Installation
Functional Tests
38 Operating Manual for XHR Series Power Supply
Current Mode
Operation
Check
1. Ensure that the front panel power switch is set to OFF.
2. Turn the voltage and current controls on the front panel fully counter-clockwise.
3. Turn the voltage control one (1) or two (2) turns clockwise.
4. Connect a DC shunt across the output terminals on the rear panel.
5. Connect a DVM across the DC shunt. The DC shunt-DVM combination must be
rated better than 0.5% accuracy.
6. Turn the power switch to ON.
7. Slowly turn the current control clockwise. The current mode LED will turn on.
8. Compare the DVM reading with the front panel ammeter reading using I=V/R
where V is the DVM reading and R is the DC shunt resistance. The control range
is from zero to the maximum rated output for the power supply model.
9. Turn the power switch to OFF.
10. Disconnect the DVM and the shunt.
Front Panel
Function
Check
1. Turn the power switch to ON.
2. Set the voltage and current controls fully clockwise. Push the STANDBY switch
to its IN position and check that the voltmeter reading falls to zero and the S/D
(Shutdown) LED turns on. Push the STANDBY switch once again to reset it to
its OUT position. The S/D LED turns off.
3. Press the STANDBY switch to the IN position.
4. Press the OVP CHECK switch. Check that the voltmeter displays approximately
the model-rated output voltage plus 10%.
5. Turn the OVP SET potentiometer counter-clockwise and check that the
voltmeter reading decreases. Continued turning (up to 20 turns) will see the
reading decrease to approximately 5% of the model-rated voltage output. Turn
the OVP SET potentiometer clockwise until the voltmeter once again displays
approximately the model rated output voltage plus 10%.
6. Press the STANDBY switch to its OUT position.
7. Make sure the voltage and current controls are turned all the way in the
clockwise direction. Press the V/I CHECK switch and check that the voltmeter
and ammeter display a minimum of the power supply model output ratings.
8. Turn the power switch to OFF.