Keep clicking the button until the screen display is shown on the right. Then long press the button for 3 seconds, the number on the screen will flash. Click the button again to increase 30 minutes delay shutdown. Then long press the button for 3 seconds to save your settings.

2. Overvoltage protection setting

Keep clicking the button until the screen display is shown on the right. Then long press the button for 3 seconds, the number on the screen will flash. Click the button again to increase 0.5 volts. Then long press the button for 3 seconds to save your settings.

3. Overcurrent protection setting

Keep clicking the button until the screen display is shown on the right. Then long press the button for 3 seconds, the number on the screen will flash. Click the button again to increase 0.5A current. Then long press the button for 3 seconds to save your settings.

4. When back to the main page, long press the button for 3 seconds to clear saved data of cumulative working time, electricity and energy.

5. Current and voltage calibration method :

Please use 5.000V standard voltage . Hold the button until “Factory setting”appear on the LED screen . It will calibrate automaticly.

Notes:

-If any tester you bought from our store can’t display the correct parameters while testing your devices, please feel free to contact us firstly and we will provide quick respond and offer you good solution.