Operation Modes 59
6.7 OPP Test Mode
OPP Test Process: Once the input voltage reaches the VON point, power activation will commence
following a specied delay. The power level will increment at regular intervals. Concurrently, the DC load
assesses whether the input voltage falls below the designated OPP voltage. If the voltage is below the
OPP threshold, the current value is then scrutinized to determine if it aligns with the predened current
range. If the current falls within this range, the OPP test results in a Pass; otherwise, it fails. Conversely,
if the input voltage surpasses the OPP threshold, the power will persist within the cut-o current range.
Additionally, a comparison is made between the OPP voltage and the input voltage during this process.
6.7.1 OPP Test Conguration
The 8550B series is capable of storing up to 5 OPP Test proles.
While conguring test parameters, you can use the up navigation key at any point
to choose the preceding parameter for editing.
To congure an OPP test le:
Step 1. Press the
+ to enter the OPP le conguration menu.
Step 2. Use the numeric keypad to set the VON LEVEL. Press the
to conrm the input enable
threshold.
Step 3. Use the numeric keypad to set the VON DELAY. Press the
to conrm the delay time
before the input is enabled.
Step 4. Use the numeric keypad to set the current RANGE. Press the to conrm the current
range.
Step 5. Use the numeric keypad to set the power START value. Press the
to conrm the initial
power input.
Step 6. Use the numeric keypad to set the power STEP value. Press the
to conrm the power
increment between steps.
The test proceeds in steps only if the measured input voltage exceeds the "OPP
Voltage." Alternatively, if the input voltage is below the "OPP Voltage," the test
concludes after executing the "Start Power" for the duration specied in "Step
Delay."
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