Precautions for measuring resistance with a multimeter
Precautions when using a multimeter to measure resistance values:
There are two types of multimeter: traditional multimeter and digital multimeter. Traditional multimeter is a pointer electromagnetic deflection type, which requires mechanical zero adjustment before each use. It is cumbersome to use and the reading of readings is subjective and inaccurate, and is now rarely used.
The digital multimeter can directly display numbers without the need to observe the scale for reading, resulting in more accurate results. It is currently the main type of multimeter used.
Precautions for measuring resistance with a multimeter:
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 shift gears before taking measurements.
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 placed at the maximum AC voltage position. 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.
A multimeter is a multifunctional and multi range measuring instrument that can be used not only to measure the resistance of the object being measured, but also to measure DC voltage. As an important measurement tool in industry, it is important to be familiar with the points to pay attention to when measuring in order to better play its role.
