MPE DP SERIES II, Operating And Service Manual

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at the over voltage trip set point. The over voltage trip (OVT) indicator should turn on, the
power and voltage control indicators should turn off, and the supply should shut down. Press
the clear key. Now set the over voltage trip set point to maximum which is 110% the full scale
rating of the power supply. Again start the supply and observe that the power supply operates
normally.
With the main power disconnected, connect a short to the power output studs, positive to
common and negative to common, on the rear panel. Reconnect the main power, set voltage and
current controls full counterclockwise, set the over voltage trip and over current trip
potentiometer controls full clockwise, and turn the power switch on.
Press the start switch and advance the voltage control one turn clockwise. Increase the current
set point to maximum and then to minimum. The power and current control indicators should
light. Dc current should increase smoothly from minimum to maximum to minimum as
indicated on the meter. Return the current control full counterclockwise. Press the stop switch.
To check over current trip, press the trip dis key on the front panel and set the over current trip
potentiometer to half the current rating of the supply. While the trip dis key is pressed, the
voltmeter and ammeter displays the over voltage trip and over current trip settings.
Press the start switch and slowly increase the current set point. Over current trip should operate
at the over current trip set point. The over current trip (OCT) indicator should turn on, the power
and current control indicators should turn off, and the supply should shut down. Press the clear
key. Now set the over current trip set point to maximum which is 110% the full scale rating of
the power supply. Again start the supply and observe that the power supply operates normally.
If any of these events do not occur, the supply is defective and should not be operated.
Depending on the circumstances, either warranty service or trouble shooting, as described in
Section 7.2, is required.
2.6.2.3 DPC Series Models
The electrical check for DPC Series models require use of the Remote Interface Software
described in Section 5.0. With the software installed and the power supply connected to the
desired communications interface, select A Version in the Configuration Setup Panel. Select the
Virtual Control Panel in the View Menu to display the A Version front panel. Follow the
procedure outlined in Section 2.6.2.2 using the Virtual Control Panel.
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