Use multimeter ohmmeter to measure two aspects:
1. The resistance of two outgoing lines shall be normal, 220V, 1000W, 48W, 1500W, 32W, and so on.
2. The (insulation) resistance between any outgoing line and the shell is more than a few megaohms. Those who can pass the above two steps are good.
The multimeter is a more precise instrument. If it is not used properly, it will cause inaccurate measurement and easy damage. However, as long as we master the use methods and precautions of the multimeter, and take care of them, the multimeter can be durable.
