TEXIO PU100-7.5, Instruction Manual

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3.8.5 OVP Check
Refer to Section 5.3 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 OUTPUT
pushbutton.
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 toward it’s maximum and check that the output voltage cannot be
increased more than the OVP setting.
7. Adjust OVP limit to the maximum by repeating step 3 and rotating the VOLT encoder CW.
3.8.6 UVL Check
Refer to Section 5.4 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. Wait a few seconds until the VOLT display returns to show the output voltage.
4. Adjust the output voltage toward it’s minimum and check that the output voltage cannot be
decreased below the UVL setting.
5. Adjust the UVL limit to the minimum by repeating step1 and rotating the VOLT encoder CCW.
3.8.7 Foldback Check
WARNING
Shorting the output may expose the user to hazardous
voltages. Observe proper safety procedures.
Refer to Section 5.5 for explanation of the FOLD function prior to performing the procedure below.
1. Ensure that the output voltage is set to approx. 10% of the unit rating.
2. Adjust the CURRENT encoder to set the current limit to approx. 10% of the unit rating.
3. Momentarily press the FOLD button. Ensure that the FOLD LED illuminates. The output voltage
remains unchanged.
4. Short the output terminals momentarily (approx. 0.5 sec.). Ensure that the output voltage falls to
zero, the VOLT display shows “Fb” and the ALARM LED blinks.
5. Press the FOLD button again to cancel the protection. The output voltage remains zero.
6. Press OUTPUT button. Ensure that the output voltage returns to it’s last setting.
7. Turn the output off by pressing OUTPUT button. Ensure that the VOLT display shows “OFF”.