Socket polarity Test Insert tester into a standard three-hole power socket. Then observe the indicator light and test results of
the comparison table, determine whether the socket wiring is correct, and then remove the tester, when the detection of the wrong
wiring, please find a professional electrician for line maintenance.
Leakage switch (RCD) Test Insert the tester into a properly connected three-hole power socket and press the RCD key (less than 3
seconds). At this time, the normal leakage switch will escape. If it does not escape, it indicates that the leakage switch has
failed. Please find a professional electrician for repair in time.
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