Portable Surge Protective Device Tester
Ⅳ
. Leakage Current Test under the Mode of Fine-Turning "Ad" Voltage
Note: 1Ad=0.293V
1. Function Selection
Choose FUNCTION 4 or 5
2. Testing
Press TEST button, release the button when a BEEP sounds.
3. Read the test data
The screen displays the break-over voltage of the tested MOV-type SPD. This is followed by the screen displaying the
leakage current under 75% of the break-over voltage every 1 second.
4. The precise testing of leakage current
In this mode, the constant voltage is 75% of the break-over voltage outputs. Read the leakage current value of the MOV
type SPD.
5. Enter the fine-turning voltage testing mode under 75% of the break-over voltage
In the alternate display mode, press the TEST button continually until hearing a sound of "Beep". Release the TEST
button, and the screen alternately displays "0" and the leakage current, it enters the fine-turning voltage testing mode.
6. Leakage current testing under the Fine-turning testing "Ad" voltage mode
"0" represents 0Ad, which is the default base value of 75% of the break-over voltage. In this mode, adjust the constant
voltage value based on the accuracy of 1Ad=0.293V.
1) Set the mode button to A position and press the TEST button. When hearing a sound of "Beep", each time reduce 1Ad
voltage based on 75% of the break-over voltage value. The screen displays the adjusted "Ad" value, and the tester will
accurately display the fine-turning constant voltage of the leakage current value.
2) Set the mode button to B position and press the TEST button. When hearing a sound of "Beep", each time boost 1Ad
voltage based on 75% of the break-over voltage value. The screen displays the adjusted "Ad" value, and the tester will
accurately display the fine-tuning constant voltage of the leakage current value.
7. More instructions of this function
1) According to the characteristics of MOV, the tested leakage current value will be inconsistent under 76%, 75% or 74%
of the break-over voltage.
2) This function can test different leakage current values under different voltages more accurately
8. Exit to standby mode
In the test mode of adjusting "Ad" voltage, press the TEST button continually until hearing a sound of "Beep". Release the
TEST button and the screen will be cleared to "0" and exit the test to return to standby mode.
