Precautions for the Use of Multimeters (1)

Precautions for the use of multimeters (1)
1. Before using the multimeter, "mechanical zero adjustment" should be performed first, that is, when there is no electricity to be measured, make the pointer of the multimeter point to the position of zero voltage or zero current.
2. In the process of using the multimeter, do not touch the metal part of the test pen with your hands, which can ensure the accuracy of the measurement on the one hand, and personal safety on the other hand.
3. When measuring a certain amount of electricity, you cannot change gears while measuring, especially when measuring high voltage or large current, you should pay more attention. Otherwise, the multimeter will be damaged. If you need to change gears, you should disconnect the test leads first, and then go to measure after changing gears.
4. When using the multimeter, it must be placed horizontally to avoid errors. At the same time, pay attention to avoid the influence of external magnetic field on the multimeter.
5. After the multimeter is used, the transfer switch should be set to the maximum block of AC voltage. If it is not used for a long time, the battery inside the multimeter should also be taken out to prevent the battery from corroding other devices in the meter.