RCD (or GFCI) Test
Insert the tester into the three hole power socket with correct wiring, RCD (or GFCI) trip current will be displayed on the display, press and hold the RCD key for more than 2 seconds. At this time, the normal leakage switch will trip off. If it does not trip, it means that the leakage switch has failed. Please find a professional electrician for maintenance.
Digital Socket Tester GD105B EU plug:
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