User Manual
47
Protection Functions
1 OCP Test Function
The load has a built-in OCP test function that can be used to automate testing for OCP conditions. The load can save
up to 5 OCP test programs into internal memory, which can be recalled and run.
The OCP Test program requires the following parameters be congured before it can be run.
“Voltage On Level” This is the minimum voltage level the load measures before the start of the test.
“Voltage On Delay” This is the delay time from when the Voltage On Level is reached to the actual start of the test.
“Current Range” This species the current range of the test. All models have two current ranges, with the lower
range allowing for higher resolution. This value will also limit the maximum current settings for
other parameters congured for the test program.
“Start Current” This is the starting current value when OCP test begins. The settable range of this value is
limited by “Current Range”.
“Step Current” This is the size of the step current as the test runs from the “Start Current” to “End Current”.
The test will only run through in steps if the measured input voltage is greater than the “OCP
Voltage”. Otherwise, the test will end after running the “Start Current” for the amount of time
specied in “Step Delay”.
“Step Delay” This is the delay time to hold each current step in the test. This determines how fast or slow to
run through the test.
“End Current” This is the ending current value before OCP test ends. The test will only run through in steps
from “Start Current” to the “End Current” if input voltage is greater than the “OCP Voltage”.
The settable range of this value is limited by “Current Range”.
“OCP Voltage” This value is a limit that is used to test for OCP conditions. In the event of an over current
condition, when the input voltage is greater than this value, the test will run through from
“Start Current” to “End Current” in steps. The input current (the over current) value will be
checked during this process. If current is within the “Max Trip Current” and “Min Trip
Current” boundaries, the load will indicate “Pass” at the end of the test. If outside of these
boundaries, the load will indicate “Fault”.
“Max Trip Current” The maximum acceptable current limit of the over current value.
“Min Trip Current” The minimum acceptable current limit of the over current value.
The following is a step by step procedure to congure an OCP test program.
1. Press ) and to enter the “OCP Test” menu. The following will be displayed:
1. Select “Edit” and press (enter) . Enter a value using the numeric keypad or rotary knob for “Voltage On Level”. The
value must be within the maximum input limits of the load.
Press (enter) to continue.
1. Enter a value for “ Voltage On Delay”. This can be set between 0.00s and 99.99s. Then press (enter) to continue.
2. Follow the same steps for “ Current Range”. The value must be within the maximum input limits of the load. Press
(enter) to continue.
3. Set the “Start Current”. The value must be less than “Current Range”. Press (enter) to continue.
4. Do the same for “Step Current” and “End Current”. Press (enter) after each setting to continue.
5. Enter a value for “OCP Voltage” and press (enter) to continue.