Chapter 3 Front-Panel Operation
Programming Overcurrent Protection
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5 Exit the OCP menu.
The “CHANGED” message is displayed for a second to show that the new OCP trip
level is now in effect. If the OCP settings are not changed, “NO CHANGE” will be
displayed. The power supply will exit the OCP menu and the display will return to
the meter mode. Check that the
OCP annunciator turns on.
Checking OCP Operation
To check OCP operation, raise the output current to near the trip point. Then very
gradually increase the output by turning the knob until the OCP circuit trips. This will
cause the power supply’s output current to drop to zero and the
OCP annunciator to
blink. The “OCP TRIPPED” message also appears on the display.
Clearing the Overcurrent Condition
When the OCP condition occurs (the “OCP TRIPPED” message is shown on the
display), the OCP annunciator blinks. When it was caused by external voltage sources
such as a battery, disconnect it first. Clear the overcurrent condition by adjusting
output current level or by adjusting OCP trip level.
The following steps show how to clear the overcurrent condition and get back to
normal mode operation. In the following steps, the display will go back to “OCP
TRIPPED” if you let the display time out after about several seconds.
• Adjust output current level
1 Lower the output current level.
Press key and set the knob for current control by pressing key, then
lower the output current level below the OCP trip point.
2 Move to the clear mode.
Press key twice to move to the OCP CLEAR mode. The “OCP ON” message
appears on the display. Turn the knob to the right until the above message appears on
the display.
CHANGED
OCP CLEAR
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