UTL8500 Series User Manual
34
Operation Steps:
1. In initial interface, select [Mode], [More], [More], and then press [Load Effect] to enter
the setting interface.
2. Move the cursor to the needed setting position by pulse knob, and press the Enter
button
to change the parameter (the parameter changes from yellow to white) by
keyboard or pulse knob. Press the Enter button
again to confirm. At this time, the
set value changes from white to yellow.
3. Other parameters can be modified in a similar way.
4. Press the ON button, the electronic load starts to load, and the indicator light below the
button lights up. If you need to stop the load, press the ON button again, and the
running indicator light goes out.
4.2.8 OVP Mode
The OVP (overvoltage protection) test function can capture the peak point of the input
voltage and the entire fall process after protection. When the voltage drops to the set trigger
voltage, the load will record the time from the peak point to the trigger point. This recorded
time is the over-voltage protection time of the tested power supply.
Figure 4-2-8-1 Interface of OVP Mode
Parameter Setting in OVP Mode:
Parameter
Description
Trigger Voltage
Set the Voltage of the Trigger Point
If you want to perform OVP test, you can press More in the menu to select the OVP test
mode, set the voltage of the trigger point,
and then press the ON button to start loading.
The overvoltage protection function of the power supply is triggered by increasing the
output voltage of the power supply under test. After the load captures the peak and falling
edge of the voltage, it starts timing and triggers at the set trigger voltage. The load records
the voltage at the peak point, and calculates the time from the peak point to the trigger
point. After the measurement, the load will display the tested Vmax (peak voltage) and
Tgap (protection time). The measurement accuracy of the protection time is 1mS.
