Tips on using test pen
Before measuring whether the electrical equipment is charged, first find a known power source to test whether the neon bulb of the test pen can emit light normally, and then it can be used. Next, check whether there is a safety resistor in the test pen, and visually check the test pen. Whether the electric pen is damaged or not affected by moisture or water, it can be used only after passing the inspection; it is strictly forbidden to touch the metal probe at the front end of the electric pen with hands, which will cause personal electric shock accidents; the position where the hand touches the electric pen should be on the metal part at the end, otherwise , because the electrified body, the electric measuring pen, the human body and the earth do not form a circuit, the neon bulb in the electric measuring pen will not emit light, causing a misjudgment that the electrified body is not charged, which is very dangerous. When testing charged objects under bright light, special attention should be paid to whether the neon bulb is really glowing (or not). If necessary, you can use the other hand to block the light and judge carefully. Does not emit light, but judges that there is electricity as no electricity. When the circuit is normal, the wire with the light bulb on is the live wire, and the wire with the light bulb off is the neutral wire. Note: (It is recommended to use an old-fashioned electric pen-the kind with a light that can emit light!) The method of using the electric pen to measure the live wire and zero line is: hold the electric pen with the thumb and middle finger, and press the pen cap or pen hanger with the index finger (do not touch the metal pen tip of the head. , to prevent electric shock), use the tip of the electric pen to touch the wires respectively, if the sensor light inside the electric pen glows, it is the live wire, otherwise it is the neutral wire or the ground wire. But it should be noted that the live wire is not necessarily the live wire. In the case of a fault, the neutral wire or the ground wire may be charged, but the live wire may not be charged. Therefore, it is suggested that non-professional people should seek help from professional electricians when encountering such problems to ensure the safety of personal facilities and the smooth resolution of problems.
