Method and apparatus for recognizing the polarity of polarized c

Details Method and apparatus for recognizing the polarity of polarized c Method and apparatus for recognizing the polarity of polarized c

1987-01-27

1988-05-31

Eisenzopf, Reinhard J.

Electricity: measuring and testing

Conductor identification or location

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324 60C, 324 60CD, 209574, G01R 2726, G01R 2700

Patent

active

047484012

ABSTRACT:
For recognizing the polarity of polarized capacitors, the capacitors are charged to a prescribable positive voltage or to a prescribable negative voltage of equal magnitude once with a constant positive direct current and once with a constant negative direct current of the same magnitude. The times respectively required for charging and/or discharging the capacitor are measured. Since the capacitor is charged and/or discharged faster given correct poling than given incorrect poling, the polarity of the capacitor can be determined from the difference between the measured times. In particular, the polarity of tantalum or aluminum electrolytic capacitors in automatic equipping of printed circuitboards or ceramic substrates can be recognized with the method.

REFERENCES:
patent: 3534853 (1970-10-01), Seaman
Roop et al., Reverse Capacitor Tester, IBM Technical Disclosure Bulletin, vol. 26, No. 2, Jul. 1983, pp. 579-581.

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