DocumentCode
1009782
Title
DC and Low-Frequency Humidity Dependence of a 20 pF Air-Gap Capacitor
Author
Rietveld, Gert ; Van den Brom, Helko E.
Author_Institution
NMi Van Swinden Lab., Delft
Volume
58
Issue
4
fYear
2009
fDate
4/1/2009 12:00:00 AM
Firstpage
967
Lastpage
972
Abstract
We have measured both the 0.01 Hz (quasi-dc) and 1.0 kHz values of a 20 pF room-temperature air-gap capacitor as a function of the environment. Its dependence on pressure and temperature is found to be small, in contrast to a significant effect of relative humidity. Moreover, this humidity dependence greatly differs for the two measurement frequencies, both in sign and magnitude. This indicates that the surface layers of adsorbed water have a significant effect on the frequency dependence of the capacitance value of air-gap capacitors.
Keywords
capacitance measurement; capacitors; electric current measurement; humidity; air-gap capacitor; capacitance 20 pF; capacitance measurement; current measurement; measurement frequencies; relative humidity; Air-gap capacitor; capacitance measurement; current measurement; humidity dependence; small currents;
fLanguage
English
Journal_Title
Instrumentation and Measurement, IEEE Transactions on
Publisher
ieee
ISSN
0018-9456
Type
jour
DOI
10.1109/TIM.2008.2007063
Filename
4689368
Link To Document