Four Ways to Judging Instrument Faults

Instruments and meters are widely used in the industry, but they may also fail during use. How do we judge? What is the judgment method?

1. The meter does not show anything, mainly because the battery power supply is not normal or the contact is not good.

2. The Megger high voltage indicator light is on but the resistance is not tested. Check if there is a high voltage output, if the test line is disconnected, and if the test article is in good contact.

3. When the ground resistance meter test shows “1” or “1 and OPEN”, the range selection is improper or the measured grounding pole is open and the current assistance pole is too large.

4, FC-2G to determine whether it is normal. Turn the "representation" of the meter's rear panel to the "Current" bit, short the panel test hole with a wire, and hit "0.75U" in the "AUTO" position. Turn on the high voltage and the display shows 1000μA ± 2 FC. If not, the FC -2G is faulty.