Chapter 3 Front-Panel Operation and Features
Programming Overvoltage Protection
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Programming Overvoltage Protection
Overvoltage protection guards the load against output voltages reaching values greater
than the programmed protection level. It is accomplished by shorting the output via
an internal SCR when the trip level is set to equal or greater than 3 volts, or by
programming the output to 1 volt when the trip level is set to less than 3 volts.
The following steps show how to set the OVP trip level, how to check OVP operation,
and how to clear overvoltage condition.
• Front-panel operation:
Setting the OVP Level and Enable the OVP Circuit
1 Turn on the power supply.
or
2 Select the output to be programmed.
3 Enter the OVP menu and set the desired trip level.
Use the knob and the resolution selection key or to set the desired trip
level. Note that you cannot set the trip levels to lower than 1.0 volt.
4 Enable the OVP circuit.
5 Exit the OVP menu.
If the OVP settings are not changed, “NO CHANGE” will be displayed. The power
supply will exit the OVP menu and the display will return to the meter mode. Check
that the
OVP1 and OVP2 annunciators turn on if the OVP circuit is enabled.
LEVEL 22.0V (E3646A)
OVP ON
CHANGED
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