The detection of fixed capacitor

A test under 10 pf small capacitance for fixed capacitor capacity is too small, under 10 pf with A multimeter to measure, only qualitative check for leakage, the internal short circuit or breakdown phenomenon. Measurement, can choose multimeter R x 10 k block, two pens and arbitrary by capacitance respectively two pins, resistance should be infinite. If the measured resistance ( A pointer to the right) Is zero, then illustrate capacitor leakage internal breakdown or damage. B to detect 10 ~ 0 01 u F pf fixed capacitor charging phenomenon, and then judge the good or bad. Multimeter use R x 1 k. Two triode beta are more than 100, and through the current for some can choose 3 dg6 models of silicon triode pipe etc. Multimeter of red and black pens and respectively with multiple tube of the emitter and the collector e c. Due to the amplification effect of compound triode, the measured capacitance charging and discharging process of amplification, the multimeter pointer swing amplitude increase, thus convenient for observation. Is that should be paid attention to in test operation, especially in the smaller capacity of capacitance measurement, repeatedly measured capacitance pin switch contact with A and B two points, can clearly see the motion of the pointer multimeter. C for fixed capacitor 0 01 u F above, can use a multimeter R x 10 k block test capacitor directly without charging process and presence of internal short circuit or leakage, and according to the range of a pointer to the right size to estimate the capacity of capacitor.

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