How to measure resistance value with multimeter
There are quite a lot of components used in the industry, each of which will have different requirements when used. As a multimeter commonly used in the industry, people also need to pay attention when using it.
Points to note when using a multimeter to measure resistance:
Multimeters are divided into two types: traditional multimeters and digital multimeters. The traditional multimeters are of the pointer electromagnetic deflection type. Before each use, mechanical zero adjustment is required. The use is cumbersome and the reading of the indication is subjective and not accurate. Now it has rarely use.
The digital multimeter can directly display numbers without observing the scale for reading, and the result is more accurate, which is the main type of multimeter currently used.
Precautions when measuring the resistance value of a multimeter:
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 lead with your hands, so that on the one hand, the accuracy of the measurement can be guaranteed, and on the other hand, personal safety can also be guaranteed.
3. When measuring a certain amount of electricity, it is not possible to change gears while measuring, especially when measuring high voltage or high current, more attention should be paid. Otherwise, the multimeter will be damaged. If you need to shift gears, you should disconnect the test leads first, and then measure after shifting gears.
4. When using the multimeter, it must be placed horizontally to avoid errors. At the same time, it is also necessary to avoid the influence of external magnetic fields on the multimeter.
5. After using the multimeter, the transfer switch should be placed in the maximum gear of the 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 components in the meter.
The multimeter is a multi-functional and multi-range measuring instrument. It can not only measure the resistance of the object to be measured, but also measure the DC voltage. As an important measurement tool in the industry, only by knowing the points that should be paid attention to during measurement can it play its role better.
