Tips on using a digital multimeter
As is well known, a multimeter is a common basic electronic testing tool. It is not an exaggeration to say that a multimeter is used wherever there is electricity. In foreign countries, a multimeter has become a necessary electronic device for households. Anyone with common knowledge about electricity will use a multimeter. A multimeter may seem ordinary, but when using it, it can be reassuring that it is prone to breakage. In fact, the fact that a multimeter is prone to breakage during use is not the fault of the multimeter itself, but sometimes it is caused by our carelessness during use.
The first reason why multimeters are prone to breakage during use is indeed due to quality issues with some multimeters on the market. Generally speaking, cheap products are not good. Multimeters priced below around 100 yuan are indeed prone to breakage, and their measurements are unstable and inaccurate. Therefore, when choosing a multimeter, if economic conditions permit, it is still better to use some slightly higher priced multimeter to ensure quality.
A guaranteed multimeter is usually prone to breakage due to user error, especially in the following three situations:
1. Accidentally measuring voltage at the current socket;
2. Over range measurement of voltage or current, especially current;
3. Measure high current in low current range.
Especially the first situation often occurs. So often we see situations where the circuit trips and the multimeter burns out when using a multimeter. This is usually when the multimeter probe is inserted into the current socket and the function is measured in the voltage range. This is also a very dangerous action, so it should be used very carefully. Some multimeters now also set up some protections to prevent such misoperations in order to solve such problems. For example, when using a mechanical baffle under voltage function, the current socket of the multimeter is closed, and the mechanical obstruction meter is mistakenly inserted. This type of form is cost-effective, simple and intuitive, but the biggest disadvantage is that the mechanical part is prone to failure after a long time. Some multimeters also add a current level misoperation alarm. Once a misoperation occurs, the multimeter will sound an alarm to remind the user. This function has certain practical value and the price is not high.
