Method of measuring film capacitance

The advantage of mastering the capacitance measurement method is that you can quickly judge the quality of the capacitance. So what I want to tell you is the measurement method of film capacitors, I hope it can help you in terms of practical operations. Using scientific methods to measure capacitance is the key to ensuring the safety and life of the capacitor.
First, you can use a multimeter to test the capacitance, the method is to use the resistance file. Practice has proved that the charging process of the capacitor can also be observed with a digital multimeter, which is actually a discrete digital quantity that reflects the change of the charging voltage. Assuming that the measurement rate of the digital multimeter is n times/second, in the process of observing the charging of the capacitor, n independent and successively increasing readings can be seen every second.
Next, I will introduce the method of detecting film capacitors using the resistance profile of a digital multimeter, which is of practical value for meters without a capacitance profile. This method is suitable for measuring large-capacity capacitors from 0.1μF to several thousand microfarads. Set the digital multimeter to the appropriate resistance level, and the red and black test leads respectively touch the two poles of the capacitor Cx under test. At this time, the displayed value will gradually increase from "000" until the overflow symbol "1" is displayed. If “000” is always displayed, it means that the film capacitor is short-circuited; if it is always displayed as overflow, it may be an open circuit between the electrodes of the film capacitor, or the selected resistance file may not be appropriate.
When purchasing thin-film capacitors, we not only need to know the capacitance parameters, but more importantly, we must also learn to measure and understand whether the capacitors are damaged. This is a detail that we cannot ignore in the use of capacitors. We manufacture safety capacitors, ceramic capacitors, varistors, film capacitors, and more high-quality capacitors at JEC. The above information comes from the R&D department of Zhixu Electronics Co., Ltd. For more information, please go to the website for more information.