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User Manual
D750
DC Power Supply
3. Turn the front panel AC power switch to On position.
4. Turn on the output by pressing OUT pushbutton so the OUT LED illuminates.
5. Observe the power supply CURRENT display and rotate the CURRENT encoder. Ensure
that the output current varies while the CURRENT encoder is rotated. The minimum
control range is from zero to the maximum rated output for the power supply model.
Compare the DVM reading with the front panel CURRENT display to verify the accuracy
of the CURRENT display. Ensure that the front panel CURRENT LED is on.
6. Turn off the front panel AC power switch.
7. Remove the shunt from the power supply output terminals.
2.7.5 OVP Check
Refer to Section 3.2.3 for explanation of the OVP function prior to performing the procedure
below.
1. Turn the front panel AC power switch to On position and turn on the output by pressing
OUT push button.
2. Using the VOLT encoder, adjust the output voltage to approx. 10% of the unit voltage
rating.
3. Momentarily press the OVP/UVL button so that the CURRENT display shows "OUP".
The VOLTAGE display will show the last setting of the OVP level.
4. Rotate the VOLT encoder CCW to adjust the OVP setting to 50% of the unit voltage
rating.
5. Wait a few seconds until the VOLT display returns to show the output voltage.
6. Adjust the output voltage to ward it's maximum and check that the output voltage can
not be increased more than the OVP setting.
7. Adjust OVP limit to the maximum by repeating step 3 and rotating the VOLT encoder
CW.
2.7.6 UVL Check
Refer to Section 3.2.4 for explanation of the UVL function prior to performing the procedure
below.
1. Press the OVP/UVL button TWICE so that the CURRENT display shows "UUL". The
VOLTAGE display will show the last setting of the UVL level.
2. Rotate the VOLT encoder to adjust the UVL level to approx.10%of the unit voltage rating.
3. WaitafewsecondsuntiltheVOLTdisplayreturnstoshowtheoutputvoltage.
4. Adjust the output voltage toward it's minimum and check that the output voltage can not
be decreased below the UVL setting.
5. Adjust the UVL limit to the minimum by repeating step1 and rotating the VOLT encoder
CW.
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