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Chapter 2 Quick Start
To Program Overvoltage Protection
35
2
5
Exit the OVP menu.
The "CHANGED" message is displayed 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 is blinking and the
CC annunicator turns on. The "OVP TRIPPED"
message also appears on the display.
Clearing the Overvoltage Condition
When the OVP circuit trips (the "OVP TRIPPED" message is shown on the
display), the
OVP annunicator 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
Display Limit
Display Limit
Over Voltage
Over Voltage
Over Voltage
Over Voltage