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Chapter 3 Front-Panel Operation
Programming Overvoltage Protection
43
3
5
Exit the OVP menu.
The “CHANGED” message is highlighted for a second to show that the new
OVP trip level is now in effect. 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
OVP annunciator turns
on.
Checking OVP Operation
To check OVP operation, raise the output voltage to near the trip point. Then
very gradually increase the output by turning the knob until the OVP circuit
trips. This will cause the power supply output to drop to near zero, the
OVP
annunciator to bli nk, and the
CC annunciator to turn on. The “OVP TRIPPED”
message also appears on the display.
Clearing the Overvoltage Condition
When the OVP condition occurs (the “OVP TRIPPED” message is shown on
the display), the
OVP annunciator blinks. When it was caused by external
voltage source such as a battery, disconnect it first. The following steps show
how to clear the overvoltage conditions and get back to normal mode
operation. In the following steps, the display will go back to "OVP TRIPPED"
if you let the display time out after about several seconds.
or
1
Readjust the OVP trip level or the output voltage level.
Lower the output voltage level below the OVP trip point after pressing the
or raise the OVP trip level by using the knob after pressing
the key.
2
Move to the clear mode.
You will see the above message after pressing the key. If you
changed the output voltage level, press the key twice. Turn the
knob to the right until the "OVP CLEAR" appears on the display.
CHANGED
ovp on
Over Voltage
Over Voltage
Display Limit
Display Limit
Over Voltage
Over Voltage
Over Voltage
Over Voltage