Title :
A re-evaluation of NPL coaxial bridge systems used in the realization of the SI farad via the DC QHE
Author :
Awan, S.A. ; Jones, R.G. ; Kibble, B.P.
Author_Institution :
Centre for Electromagn. & Time Metrol., Nat. Phys. Lab., Teddington, UK
Abstract :
A re-evaluation of the coaxial bridge systems used in the traceable measurements of NPL 10 pF primary capacitance standard via the DC, QHE is discussed. Comparisons are made between the previously reported measurement uncertainties and recent measurements on the 100:1 equal power, quadrature, and 10:1 coaxial bridge systems, in order to evaluate systematic errors.
Keywords :
bridge instruments; capacitance measurement; measurement errors; measurement standards; measurement uncertainty; quantum Hall effect; units (measurement); 10 pF; DC quantum Hall effect; SI farad; coaxial bridge system; equal power bridge; measurement uncertainty; primary capacitance standard; quadrature bridge; systematic error; Bridge circuits; Capacitance; Coaxial components; Current measurement; Current transformers; Impedance; Measurement standards; Measurement uncertainty; Power measurement; Resistors;
Conference_Titel :
Precision Electromagnetic Measurements, 2002. Conference Digest 2002 Conference on
Conference_Location :
Ottawa, Ontario, Canada
Print_ISBN :
0-7803-7242-5
DOI :
10.1109/CPEM.2002.1034823
