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b.
Set voltage control potentiometer on front panel fully counterclockwise.
c.
Connect a precision DMM to TB1-8(+) with reference to TB1-11(-). Set DMM to
DC milliamps and 2 milliamp range.
d.
Apply power to power supply.
e.
Adjust R71 for 1.000 milliamps on DMM.
Current Zero Calibration
The voltage control circuit (U8) zero is adjusted by R106. The following sequence is
recommended.
a.
Connect jumper (short circuit) between TB1-4 and TB1-6.
b.
Connect resistive load and DMM across output terminals of power supply. Set
DMM to read DC volts and approximately 200 millivolt range.
c.
Set current control potentiometer full clockwise.
d.
Apply power to power supply.
e.
Adjust R106 until the power supply output voltage starts to increase in the
normal polarity. Reverse adjustment direction of R106 until output voltage
decreases to zero reading on the DMM. Do not continue adjustment once the
output reads zero millivolts.
Voltage Full-Scale Calibration
Full-scale voltage calibration is accomplished by adjusting R101. The following
sequence is recommended.
a.
Connect a resistive load across output terminals.
b.
Connect a DMM between TB1-2 and TB1-6. Set DMM to DC volts and the
scale to read maximum rated power supply voltage.
c.
Connect a second DMM between TB1-4(+) and TB1-6(-). Set DMM to DC volts
and scale to read 5.00 volts.
d.
Rotate current control to maximum clockwise.
e.
Apply power to power supply.
f.
Rotate voltage control for 5.00 volt reading to DMM attached to TB1-4 and
TB1-6.
g.
Adjust R101 until output voltage reading is 100% of rated output voltage DC
between TB1-2 and TB1-6.
Current Zero Calibration
The current control circuit (U7) zero is adjusted by R87. The following sequence is
recommended.
a.
Connect a jumper (short circuit) between TB1-9 and TB1-11.
b.
Connect a resistive load and DMM across the output terminals of the power
supply. Set DMM to read DC volts and approximately 200 millivolt range.
c.
Set voltage control potentiometer on front panel fully clockwise.
d.
Apply power to power supply.
M520086-01
4-4
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