Title :
DC and low frequency humidity dependence of an air-gap capacitor
Author :
Rietveld, Gert ; Van den Brom, Helko E.
Author_Institution :
NMi Van Swinden Lab., Delft
Abstract :
We have measured both the 0.01 Hz (quasi-DC) and 1.0 kHz value of a room temperature air-gap capacitor as a function of environment (pressure, temperature, humidity). A huge difference in the humidity dependence was discovered in both measurements. This proves that surface layers containing adsorbed water have a significant effect on the frequency dependence of the capacitance value of air-gap capacitors.
Keywords :
capacitors; electric current measurement; electrometers; humidity; air-gap capacitor; electrical current measurement; frequency 0.01 Hz; frequency 1.0 kHz; low-frequency humidity dependence; surface layers; vibrating reed electrometer; water adsorption; Air gaps; Calibration; Capacitance measurement; Capacitors; Current measurement; Frequency dependence; Frequency measurement; Humidity measurement; Pressure measurement; Temperature dependence;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2008. CPEM 2008. Conference on
Conference_Location :
Broomfield, CO
Print_ISBN :
978-1-4244-2399-6
Electronic_ISBN :
978-1-4244-2400-9
DOI :
10.1109/CPEM.2008.4574966
