How to use an electric tester? How to use an electric tester
Low voltage test pen is commonly used to test whether the live wire of 220V AC power is energized or to check the continuity of the circuit. Usage: Use bare fingers to pinch or hold the metal cap or clip at the end of the test pen, and gently touch the exposed wire or electrical contact with the tip of the test pen (some are metal tips, some are gong blade heads). If the indicator light on the small window in the middle of the test pen emits red light, it indicates that the wire or contact being touched is a 220V live wire. If it doesn't light up, there are three situations: ① It may be the zero line. ② It may be a live wire but there is no power supply It may be a live wire but it has been disconnected.
As an electrician in a power plant, it is necessary to carry a test pen with you. At present, there are two types of electronic testing pens, one is the traditional one and the other is the electronic one. It can be said that although the traditional one is relatively old, the traditional one is still used. But the electrical testing is more accurate, and the impact of induced electricity is relatively small. Especially in power plants, due to the large amount of induced electricity, the advantage of using neon tubes as test pens becomes apparent, and gloves must be taken off when using electricity. Hold the metal part of the tester cap with your hand. It's best to hold the other hand against the wall and move the testing pen towards the live wire core. If the pen lights up, it means the wire is live. Electronic test pens generally have two functions. One is to measure whether the wire is charged, and the other is to measure induced electricity. When measuring whether the wire is charged, remove gloves and hold the measuring cap of the voltage tester with your hand. Place the metal head of the electric pen on the wire core, and touch the wall with the other hand. The LCD screen will display the voltage level you have measured. If the measuring rod needs electricity, press your hand on the measuring cap of Yandian Electric Induction. Place the palladium metal head on the outer skin of the wire, and hold the wall with the other hand. The voltage tester will display the magnitude of the induced electricity. But one thing must be remembered, whether it's a handheld or an electronic testing pen. They are all used for measuring low voltage electricity. Never measure high voltage electricity. I took off my gloves and held onto the wall with one hand in order to measure more accurately.
