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A The light will go on when a plug is pulled out.
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A Touch the induction break-point test button with a finger, and put the screw bit close to the power line. If the power line is live, thevoltage tester will show a lightning symbol.
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A (1) The socket is not grounded.
(2) The electric field of attachments is too strong.
(3) The line is aged and inferior.
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A (1) When testing a live line, touch the direct test button with a finger and insert the pencil point into the live line to touch the copper. The display will show values of 12V, 35V, 55V, 110V and 220V. The last number is the voltage measured. If the displayed value can not reach 70% of the high section, it will display the lower section.
(2) When testing a zero line, touch the direct test button with a finger and insert the pencil point into the zero line to touch the copper. The display will show a value of 12V (in the presence of an external electric field).
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A In an AC circuit, if the neon tube gives out light when avoltage tester is used to touch the line with one hand on its cover or clip, it proves that the line is live. In normal cases, the neon tube gives out no light when the zero line is touched. The neon tube will also give out no light if only avoltage tester is used to touch the live or zero line without hand touching.
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A During the test, the voltage can be judged by the luminescence intensity of the neon tube.
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A 1. The accuracy is ±(1.0%+5) when the resistance is 200Ω.
2. The accuracy is ±(1.0%+5) when the resistance is 2KΩ/20KΩ/200KΩ.
3. The accuracy is ±(1.2%+5) when the resistance is 2MΩ.
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A No, it doesn’t.