A quick little lesson in leak testing of electrical equipment with a multimeter
As we all know, electrical equipment leakage phenomenon is likely to occur at any time, how to find leakage phenomenon in a timely manner? Now introduces several simple methods, you may wish to try.
First, with a multimeter to measure the leakage voltage, the multimeter switch on the AC voltage measurement file, generally placed on the AC voltage 250V gear, and then insert the black pen into the soil near the measured equipment, the red pen is connected to the metal casing of the equipment. At this time to see the multimeter on the number of instructions, if the needle does not move, can be changed in turn to put the low gear, until the indication of the specific data that is the leakage voltage of the equipment. If when the pen in the lowest gear is still no indication, that is, the equipment does not leakage phenomenon exists.
Second, with the power test pen to check for leakage. Checker hand holding the power test pen directly connected to the metal casing of the power equipment, when the neon tube in the power test pen is bright, that is, the equipment has a leakage phenomenon, and that the leakage voltage is higher. When the neon tube does not light up, can not indicate that the equipment does not leakage phenomenon, may be a low leakage voltage neon tube does not light up, there may be no leakage voltage.
Third, in the absence of a multimeter and power pen, the back of the hand can be used to touch the metal shell of the power equipment. When there is numbness or electric shock feeling, it shows that the equipment has leakage voltage. When there is a sense of electric shock must be vigilant, indicating that the leakage voltage is relatively high. To stop the machine to check and analyse the cause, troubleshooting before use, otherwise there may be electric shock accident.
