How to use a pointer multimeter to measure leakage
Use the pointer universal to measure the leakage, and use the voltage file and the resistance file to measure when the electrical equipment under test is charged and not charged.
1. For example, if you suspect that the electric kettle has leakage, use the 10K gear of the multimeter when it is not charged, connect one end of the test lead to the end of the socket, and the other test lead to the shell of the kettle, and test the two electric piles in turn to see if the needle moves. The action can be measured with the 1k gear. If there is an electric leakage meter needle still moves, then the kettle will cause a leakage trip when it is in use.
2. If it is live, measure whether there is leakage between the ungrounded electrical appliance and the shell. Use a multimeter to measure with 250V AC gear. One test lead is connected to the shell and the other test lead is grounded to see if the needle moves. If the needle does not move, adjust the scale Measure again at the 10V AC level, if there is no action, it means that the electrical appliance is not leaking. Don't worry about the problem, this kind of measurement can't cause the leakage protection to trip, because the weak current passing through the meter head of the multimeter is not enough to make the 15mA upward current of the leakage protection to trip.
3. If you want to test the rice cooker in the picture below, you can use a multimeter with a 10K range to test it. The red test lead is connected to the shell, and the black test lead is used to test the other two wires. If the test needle does not move, it means that there is no leakage. Remember: for any electrical appliance with three wires plugged in, as long as the resistance is used to measure the resistance of the ground wire and the other two piles, you will know whether there is leakage or not. resistance.
Put the multimeter on the AC voltage range of 250V, clamp one test lead to the place where the leakage is suspected, and clamp the other test lead to the ground wire of the electric box. If there is voltage, it means that there is leakage.
Switch to the AC gear 50v, connect one test lead to the place where the leakage is suspected, and pinch or ground the other test lead with your fingers. If the test needle hits about 50v, it means that the electrical leakage!
