Reasons why the multimeter may not be able to measure the value of the capacitance
First, the multimeter, capacitors have no capacity
First of all, to rule out whether the multimeter failure, he? Multimeter failure is to use the multimeter to measure the resistance, if there is a standard resistance measurement standard resistance may calibrate the resistance block of the multimeter, if the Wang Yong table to measure the resistance when you have a response and the value is normal, then we can judge the multimeter is not damaged.
Capacitor has no capacity, this is the naked eye can not be observed, if we use the multimeter does not have any response, then we have to replace a new capacitor, use the multimeter to measure, if this capacitor has a response, then you can judge the previous capacitor does not respond because of the lack of capacity caused.
Second, do not choose the right gear
Measurement of capacitance can use the resistance file, you can also use the capacitance file, you can use the pointer type multimeter can also use the digital multimeter, if you use the pointer type multimeter must choose a good good good, if the capacitance is large, we try to choose the resistance of a small file, so that we observe the return of the time is more obvious, if the capacitance is large and choose a large file fluctuations are small, sometimes we can not be found by eye. Discover.
If we choose a digital multimeter, we must also first find a good gear to observe the value of change, generally when the capacitor discharge will fluctuate, and then back to the forest is just the process of discharge, indicating that the capacitor is good.
Third, directly choose to measure the capacitance value of the multimeter
With the above experience, we can directly buy the capacitance value of the multimeter can measure, the multimeter to the capacitance file, the red pen on one foot, the black pen on the other foot, the general multimeter capacitance file is only a gear, directly connected to measure, if the capacitance is good, directly on the screen will be able to show the value of the capacitance, and the measured value will be calibrated value of the 5 per cent error.
