The basis of the CBB capacitor detection method

CBB capacitor based detection method

CBB capacitor is a kind of widely used electronic components, in life we often meet the CBB capacitor failure problem, so it is necessary for us to understand some CBB capacitor detection methods in common use, just come with me and know about the below.

a, detection under 10 pf little CBB capacitor. Fixed capacitor capacity is too small, under 10 pf with a multimeter to measure, only qualitative to check whether there is leakage, its internal short circuit or breakdown phenomenon. When measuring, can choose multimeter R× 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 CBB capacitor leakage internal breakdown or damage.

2, 10 pf ~ 0 01 uf CBB capacitor charging phenomenon, and then judge the good or bad. Multimeter choose R× 1 k. Two triode & beta; Values are more than 100, and through the electric current is smaller. 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 CBB capacitor charging and discharging process of amplification, the multimeter pointer swing amplitude increase, thus convenient for observation. Is that should be paid attention to: when in the test, 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.

3, for fixed capacity more than 0 01 uf, multimeter R× are available; 10 k block directly testing the CBB capacitor for the 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 the CBB capacitor.

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