Portable Surge Protective Device Tester
Ⅴ
. GDT Test and Calibration
1. Function Selection
Choose FUNCTION 6
2. Testing
Press TEST button, release the button when a BEEP sounds.
3. Read the test data
The voltage is boosted at a rate of 100V/s. The screen will then display the breakdown voltage of the tested GDT-type
SPD.
4. Exit to the standby mode
In about 1 second without any key operation, the screen will be cleared to "0". At this point, exit the test to the standby
mode.
VI Precise Testing and Calibration of Breakdown Voltage
1. Function Selection
Choose FUNCTION 7
2.Slow boosting and calibration with a multimeter
Press the TEST button, and release the TEST button when a BEEP sounds.
3. Read the testing data
The voltage is boosted at the speed of 100V/s. The screen will display the breakdown voltage of the tested GDT-type
SPD. Boost the voltage at the same rate again. When the voltage reaches close to the breakdown point of 100Ad, slow
down boosting the voltage at a rate less than 1V/second. The screen will keep displaying the corresponding voltage
values until the SPD is broken down, after which the breakdown voltage will display on the screen.
5. Exit to the standby mode
The screen will be cleared to "0" and you can exit the test to the standby mode in about 1 second without any key
operation.
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4. Calibration Mode of Breakdown 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 slow boosting mode, voltage will be boosted at the speed of less than
1V/second. Compare the voltage displayed on the tester screen with the
measured voltage from the multimeter.
4) Open the back cover of the tester and adjust the tester R4(Potentiometer) to
make the tester display the same value as the multimeter. The calibration of the
breakdown voltage is then completed.
