The use of digital multimeter buzzer can measure capacitance is good or bad

Using a digital multimeter buzzer file, you can test the quality of electrolytic capacitor at a high speed. As shown in figure 5 - measuring methods 14. Use digital multimeter to buzzer archives, two pens and distinguish with two pins of the test capacitor Cx contact, should be able to hear a rapid hum, immediately suspended, noise also showed overflow symbol & other; 1' 。 Then, will be two pens and raises the measure again, should a buzzer sound again, beginning according to overflow symbol & other; 1' The situation marked by measuring basic normal electrolytic capacitor. At this point, and then to 20 m & Omega; Or 200 m & Omega; High impedance profile measure capacitor leakage resistance, can distinguish the good or bad.

the principle of the measurement process is: test just beginning, instrument for Cx charging current is larger, the equivalent of channel, so the buzzer sound. From time to time as the capacitor voltage on both ends, tall charging current rapidly decreases, and beginning to make buzzer sound.

test, assumes that the buzzer sound continuously, indicate the electrolytic capacitor inside once short circuit; If switch to repeat pens and measurement, buzzer is not ring, instrument is always displayed as & other; 1' , indicate the capacitor being measured internal circuit or capacity.

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