Powerten D3 Series, Operation Manual

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4.2.3 P83 and P86 Series Calibration procedures
In this section refer to Figures 4-4 and 4-5 for locations of assemblies and
potentiometers.
5V Reference Calibration
The 5V reference for the front panel voltage and current control must be
calibrated first. Refer to Figure 4-3 for locations of components on the control
assembly.
a. With prime power removed, remove jumpers J11 and J12 on the surge
limit & power switch board of all converter assemblies.
b. Connect a digital multimeter (DMM) between E1 and E3 of the current
control potentiometer R32 on the control assembly.
c. Apply prime power to the power supply, and push the front panel switch to
the ON position.
d. Adjust potentiometer R29 until DMM across E1 and E3 indicates 5.000
VDC.
e. Remove prime power from power supply and wait 3 minutes (minimum) for
filter capacitors to discharge.
Converter Assembly Calibration
For proper results, the converter assemblies must be calibrated prior to the
calibration of control assembly A1. Refer to Figures 4-4 an 4-5 for locations of
components on the converter assembly.
Primary Current Limit Calibration
1. Remove prime power to the power supply. Remove jumpers J11 and
J12 on all converter assemblies not being calibrated. Leave jumpers
installed on assembly to be calibrated.
2. Connect a load of 5% heavier than full-rated power of the converter
assembly rated output power. (The converter assembly rated output
power = the power supply rated output power divided by the number
of converter assemblies.) For 15 kW models, there are three
converter assemblies.
3. Connect a DMM across external current shunt.
4. Connect a second DMM across the output terminals of the power
supply. Set DMM to read maximum rated power supply output
voltage.
5. Connect a third DMM across two of the three AC input terminals of the
power supply. Set DMM to read maximum rated power supply input
voltage.
6. Connect a variable transformer in series with the prime power of the
power supply.
7. Rotate front panel voltage control fully clockwise.
M550001-01
4-6