What are the methods for measuring current with a multimeter
1. The gear position should be consistent with the type of current being measured. Choose the correct gear based on the AC/DC type of current you want to measure, with AC corresponding to the AC gear and DC corresponding to the DC gear;
2. Choose a suitable range, otherwise it is highly likely to cause the multimeter to burn down. If you do not know the magnitude of the measured current, you should choose the maximum range. For example, a digital multimeter with a 20 ampere range can measure a current of 4.4 kilowatts of electricity;
3. Connect the multimeter in series to the live wire of the electrical appliance. To do this, the first step is to turn off the electrical switch. The second step is to unplug the plug and connect the meter in series; The third step is to plug in the plug and then close the switch. At this point, the reading of the multimeter is both the desired value.
Attention: Using this method to measure current in high-power appliances is very dangerous and can easily burn the meter. It is recommended to use a clamp type ammeter. This way, it is both safe and easy to operate.
Precautions for use
1. Before using a multimeter, it is necessary to perform a "mechanical zero adjustment", which means that when there is no measured electricity, the multimeter pointer should be positioned at zero voltage or zero current.
2. During the use of a multimeter, do not touch the metal part of the probe with your hands. This ensures accurate measurement and personal safety.
3. When measuring a certain amount of electricity, it is not advisable to shift gears simultaneously, especially when measuring high voltage or high current. Otherwise, it may cause damage to the multimeter. If you need to shift gears, you should first disconnect the probe and then take measurements after shifting gears.
4. When using a multimeter, it must be placed horizontally to avoid errors. At the same time, attention should also be paid to avoiding the influence of external magnetic fields on the multimeter.
5. After using the multimeter, the transfer switch should be set to the maximum AC voltage. If not in use for a long time, the battery inside the multimeter should also be removed to prevent the battery from corroding other components inside the meter.
