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Chapter 2 Quick Start
To Program Overcurrent Protection
38
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 OCP circuit trips.
This will cause the power supply's output current to drop to zero and the
OCP
annunciator is blinking. The "OCP TRIPPED" message also appears on the
display.
Clearing the Overcurrent Condition
When the OCP circuit trips (the "OCP TRIPPED" message is shown on the
display), the
OCP 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 overcurrent conditions 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.
or
1
Readjust the OCP trip level or the output current level.
Lower the output current level below the OCP trip point after pressing the
or raise the OCP 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 current level, press the key twice. Turn the
knob to the right until the "OCP CLEAR" appears on the display.
3
Clear the overcurrent condition and exit this menu.
Now, when you press the key again, the "DONE" message is
displayed for a second and the
OCP annunciator will not blink any more. The
output will return to meter mode.
ocp on
Over Current
Display Limit
Display Limit
Over Current
Over Current
Over Current
Over Current
Over Current