Title :
A proposal for a toroidal cross-capacitor
Author :
Castelli, Franco
Author_Institution :
Dipt. di Elettronica, Politecnico di Milano, Italy
fDate :
8/1/2000 12:00:00 AM
Abstract :
A proposal which describes the feasibility of both a secondary and an absolute transportable standard of capacitance having fixed intrinsic values rather then corresponding to a change of capacitance is illustrated. This has been achieved by the toroidal cross-capacitor (TCC) form which is exempt from “end” effects: The proposal evaluates the best form of the ring electrodes and the features of their design to fulfil this purpose with a relative uncertainty of a few parts in 10-8 for a capacitance value in the range from 0.6 pF to 1.65 pF
Keywords :
capacitance measurement; capacitors; transfer standards; 0.6 pF to 1.65 pF; 0.6 to 1.65 pF; Thompson-Lampard theorem; capacitance; cylindricity measurement; design; end effects; fixed intrinsic values; geometrical imperfection; relative uncertainty; ring electrodes; roundness measurement; toroidal cross-capacitor; transportable standard; Bars; Capacitance; Capacitors; Displacement measurement; Electrodes; Fasteners; Length measurement; Measurement standards; Proposals; Uncertainty;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
