ITech IT8900 Series - OCP Test Function

Function and Features
Copyright © ITECH Electronic Co., Ltd. 35
[Enter] key.
TRANSITION
On Off
9. Enter the dynamic test mode.
10.0000V 0.0000A
0.00W 0 TRAN
10. Press [On/Off] key to open input and press [Shift] + . (Trigger) key.
The load will switch after receipt of every trigger signal. The load will switch
between A and B value for one time. Time of operations is shown at bottom
right.
11. Press [CC]/ [CV]/ [CR]/ [CW] key or any composite function key to exit
dynamic test function. Repeat Steps 1-10 to continue parameter setting
and operation of dynamic test.
3.10 OCP test function
The IT8900 series electronic load is provided with overcurrent protection test
function (OCP). Under OCP test mode, when input voltage reached Von value,
delay for a while for the electronic load to latch. Ascend value by step value at
regular interval. At the same time, check the load input voltage and judge
whether it is higher than standard voltage value. If higher, it indicates that OCP
does not occur. Repeat current stepping operation till the load operates to the
cutoff current; if lower, it indicates that OCP does occur. Check whether the
existing current value is within target scope again. If yes, PASS the test.
Operating steps:
1. Press [Shift] + [CC] (OCP) keys to enter OCP test function setting screen.
OCP
TEST
Run
OCP TEST
Operate OCP test documents.
Recall
OCP TEST
Recall OCP File=1
Recall OCP test documents (1-5).
Edit
OCP TEST
1: Voltage on level=0.000V
Set Von voltage value.
2: Voltage on Delay=0.00S
Set Von voltage delay time.
3: Current Range=0.000A
Set working current range.
4: Start Current=0.000A
Set initial current value.
5: Step Current=0.000A
Set step current value.
6: Step Delay=0.00S
Set step delay time.
7: End Current=0.000A
Set cutoff current value.
8: OCP Voltage=0.000V
Set OCP value.
9: Max Trip Current=0.000A
Set overcurrent range (maximum
value).
10: Min Trip Current=0.000A
Set overcurrent range (minimum
value).
Save OCP File=1(1-5)
Save OCP test documents.
2. Press [Shift] + . (Trigger) key to start OCP test. If within range, PASS the
test and the board will display as follows:
9.9973V 0.0005A
0.01W 5.100A PASS STOP