Ametek Sorensen Asterion DC Series, Operation Manual

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Calibration Asterion DC Series
3-42
3.2.3 Overvoltage Protection
The Overvoltage Protection (OVP) function allows the supply to shut down the
output, if it were to exceed a preset voltage. This may be used to protect sensitive
circuits or loads from damage caused by an excessive voltage on the output of the
supply. The Overvoltage Protection (OVP) could be programmed either through the
front panel or by the remote analog OVP programming input. To verify OVP
operation, follow these steps:
1. Make sure there is nothing connected across the output terminals.
2. Turn on the power supply.
3. If the Power ON Settings (PONS) had previously been configured to be OFF,
when the supply reaches the Dashboard Screen, enable the output by
pressing the “Output On/Off”.
4. Use the Output Program Screen to program the Voltage, Current and OVP.
5. Program the Current to 10% of rated output (program the current above zero
to enable supplying output current while in the constant-voltage mode).
6. The factory default setting is approximately 110% of the maximum rated
output of the supply. On the Output Program screen, rotate the rotary knob
to set the “OVP”. Press the rotary knob to highlight the OVP value. Rotate the
rotary knob anti-clockwise until the OVP is programmed to about 80-90% of
the maximum rated output voltage.
7. On the Dashboard screen, rotate the rotary knob to select the
“Voltage” text box in the “Setting” section. Press the rotary knob to
highlight the voltage value. Rotate the rotary knob clockwise and
observe the voltage display in the “Measure” section on the
Dashboard screen begin to accelerate up. When the output voltage
exceeds the OVP trip point, the OVP warning screen will be displayed
saying that the output tripped due to an OVP fault. Refer to Figure 3-
80.
8. The Output State will be programmed to OFF , and the Voltage, Current, and
OVP settings will retain their previous settings.
9.
Press “Clear OVP” on OVP Warning screen and the fault screen will clear.
The Dashboard screen will be displayed, and the output will remain disabled.
10. Using the Dashboard screen, program the OVP setting as appropriate for the
application. If OVP is not used, then “OVP” programming may be set at
maximum, approximately 110% of the rated output voltage of the supply.