Powerten D3 Series, Operation Manual

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8. Remove prime power from the power supply, and wait three minutes
(minimum) for the filter capacitors to discharge.
Current Feedback Amplifier Zero Calibration.
1. Remove jumper J9 on the converter board.
2. Connect a DMM between the output of U8, pin 1, and the common
return (on converter assembly A2).
3. Apply prime power to power supply, and push the front panel switch to
the ON position.
4. Adjust R68 for zero null (minimum voltage on DMM).
5. Remove prime power from the power supply, and wait 3 minutes
(minimum) for filter capacitors to discharge.
6. Replace jumper J9.
Current Feedback Amplifier Full-Scale Calibration.
1. Remove prime power to the power supply, and leave jumper installed
on J9.
2. Connect DMM between the output of the current feedback scaler U8,
pin 1, and the common circuit. Set DC voltage scale to read 5.0 volts.
3. Connect a second DMM across the external current shunt.
4. Rotate front panel voltage control fully clockwise.
5. Rotate front panel current control fully counterclockwise. This
changes the operation of the power supply from the voltage to the
current mode.
6. Apply prime power to power supply, and push the front panel switch to
the ON position.
7. Rotate front panel current control clockwise until DMM indicates 5.000
VDC between U8, pin 1, and common.
8. Adjust converter assembly potentiometer R64 until DMM across
external current shunt indicates full-rated output current.
9. Remove prime power from power supply and wait 3 minutes
(minimum) for filter capacitors to discharge.
4.2.2 P63, P66 and D3 Series Calibration procedures
In this section refer to Figures 4-2 and 4-6 for locations of assemblies and
potentiometers.
M550001-01 4-3