Tips for using a multimeter to quickly find leaks in electrical equipment
Tips on using a multimeter to quickly find leakage in electrical equipment
As we all know, leakage of electrical equipment may occur at any time. How to detect leakage in time? Here are some simple methods. You may wish to give it a try.
First, use a multimeter to measure the leakage voltage. Put the multimeter switch on the AC voltage measurement range, usually the AC voltage 250V range. Then insert the black test lead into the soil near the equipment being measured, and connect the red test lead to the metal of the equipment. on the shell. At this time, look at the indication on the multimeter. If the needle of the meter does not move, you can turn it to low gear in sequence until the specific data is indicated, which is the leakage voltage of the device. If there is still no indication when the test leads are at the lowest setting, it means that there is no leakage of electricity in the device.
Second, use a test pen to check for leakage. The examiner holds the electric test pen and connects it directly to the metal shell of the electrical equipment. When the neon tube in the electric test pen lights up, it means that the equipment has leakage and the leakage voltage is high. When the neon tube does not light up, it does not mean that the equipment has no leakage. It may be that the leakage voltage is low and the neon tube cannot light up, or there may be no leakage voltage.
Third, if you don't have a multimeter or test pen, you can touch the metal casing of the electrical equipment with the back of your hand. When you feel numbness or electric shock in your hands, it means that the equipment has leakage voltage. You must be more vigilant when you feel an electric shock, which means the leakage voltage is relatively high. It is necessary to stop the machine to check and analyze the cause, and then use it after troubleshooting, otherwise an electric shock accident may occur.
