The reason why the multimeter cannot measure the capacitance value
The capacity of the capacitor can be measured with a multimeter, or a multimeter can be used to judge whether the capacitor is good or bad. So if we use a multimeter to measure the capacitance but there is no response, what problems will there be?
1. The multimeter and the capacitor have no capacity
First of all, it is necessary to rule out whether the multimeter is faulty, what about him? The method of multimeter failure is to use the multimeter to measure the resistance. If there is a standard resistance to measure the standard resistance, it may calibrate the electric resistance of the multimeter. If you respond and the value is normal when Wang Yongmeter measures the resistance, then we can judge that the multimeter is not damaged.
The capacitor has no capacity, which cannot be observed by the naked eye. If we use a multimeter and there is no response, then we need to replace a new capacitor and use a multimeter to measure it. If the capacitor responds, then we can judge whether the previous capacitor did not respond. due to lack of capacity.
2. Not choosing the right gear
To measure capacitance, you can use the resistance file or the capacitance file. You can use the pointer multimeter or the digital multimeter. If you use the pointer multimeter, you must choose a good meter. It is more obvious when we observe the return to the center. If the capacitor has a large capacity and a large gear is selected, the fluctuation is relatively small, and sometimes we cannot detect it with the naked eye.
If we choose a digital multimeter, we must first find a good gear to observe the value change. Generally, when the capacitor is discharged, it will fluctuate, and then returning to the forest is just a discharge process, indicating that the capacitor is good.
3. Directly select the multimeter for measuring capacitance value
With the above experience, we can directly buy a multimeter that can measure the capacitance value, put the multimeter to the capacitance position, put the red test lead on one foot, and put the black test lead on the other foot. Generally, the capacitance of the multimeter has only one position. , directly connected for measurement, if the capacitance is good, the capacitance value can be displayed directly on the screen, and the measured value will have a 5% error of the calibration value.
