Measurement of electrode surface effects in air capacitors using a precise Coulombmeter

Measurement of electrode surface effects in air capacitors using a precise Coulombmeter

A method by which air capacitor electrodes are charged with a DC voltage and then quickly discharged is described. Immediately afterwards, a very sensitive Coulombmeter is switched on to measure the additional discharging of thin dielectric films on the electrodes. The method makes possible the meas...

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Veröffentlicht in:IEEE transactions on instrumentation and measurement 1989-04, Vol.38 (2), p.378-380
Hauptverfasser: Bego, V., Butorac, J., Gasljevic, G.
Format: Artikel
Sprache:eng
Schlagworte:
Capacitance measurement
Capacitors
Current measurement
Dielectric films
Dielectric measurements
Electrodes
Frequency measurement
Surface discharges
Time measurement
Voltage
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Zusammenfassung:A method by which air capacitor electrodes are charged with a DC voltage and then quickly discharged is described. Immediately afterwards, a very sensitive Coulombmeter is switched on to measure the additional discharging of thin dielectric films on the electrodes. The method makes possible the measurement of effects having a time constant of several milliseconds to several thousand seconds, and also enables the frequency dependence of the capacitance to be determined, even for time constants below 1 ms.< >
ISSN:0018-9456
1557-9662
DOI:10.1109/19.192310