Title :
Progress in linking the farad and the R/sub K/ value to the SI units at BNM-LCIE
Author :
Trapon, G. ; Thevenot, O. ; Lacueille, J.C. ; Poirier, W. ; Fhima, H. ; Geneves, G.
Author_Institution :
Lab. Central des Ind. Electr., Bur. Nat. de Metrol., Fontenay-Aux-Roses, France
Abstract :
A calculable capacitor and a quadrature bridge are used at BNM-LCIE to link capacitance unit and R/sub K/ value to the SI units. Modification of the calculable capacitance movable guard guiding and revaluation of the transfer resistors frequency dependencies have been done to improve the results of these two direct determinations. Preliminary measurements show that R/sub K/=R/sub K-90/(1+6.6 10/sup -8/) (1/spl sigma/=7.10/sup -8/).
Keywords :
bridge instruments; capacitance measurement; capacitors; units (measurement); BNM-LCIE; R/sub K/ value; SI units; calculable capacitor; farad; frequency dependencies; quadrature bridge; transfer resistors; Ball bearings; Bars; Bridge circuits; Capacitance measurement; Capacitors; Footwear; Frequency; Joining processes; Particle measurements; Resistors;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2000 Conference on
Conference_Location :
Sydney, NSW, Australia
Print_ISBN :
0-7803-5744-2
DOI :
10.1109/CPEM.2000.850952
