Portable Surge Protective Device Tester
Ⅱ
. Precise Test and Calibration Mode of Break-Over Voltage
1. Function Selection
Choose FUNCTION 2
2. Test
Press TEST button, release the button when a BEEP sounds.
3. Read the test data
Test the precise value of the break-over voltage until the screen continually displays the tested break-over voltage of the
MOV-type SPD, read the test data.
6. Exit to the standby mode
In the state of displaying the break-over voltage, press the TEST button. When you hear a "Beep". Release the TEST
button and the screen will be cleared to "0". Then exit the test to return to the standby mode.
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4. Verify the current value of 1mA
1) Choose a multimeter "Fluke 87V" or any other multimeter with an accuracy
of 0.1μA. Connect the multimeter in series with the MOV type SPD and the test
pens, and verify the constant current output of 1mA.
2) The description of the MOV leakage current is given by the tested voltage
value when the constant current is 1mA. According to this characteristic, the
more accurate the 1mA constant current outputs, the more accurate the testing
data of the break-over voltage will show on the display.
5. The calibration of the break-over voltage
1) Choose a multimeter "Fluke 87V" or any other multimeter with the accuracy
of 0.1V.
2) Connect the multimeter probes in parallel with the SPD and the test pens.
3) In this mode, while maintaining the constant current of 1mA outputs, the
tester continually displays the break-over voltage value.
4) Open the tester and adjust the tester R3 (Potentiometer) to make the tester
display the same value as the multimeter. At this point, the calibration of the
break-over voltage is completed.
