Title :
Resistance scaling up to 1 M/spl Omega/ at PTB with a cryogenic current comparator
Author :
Pesel, E. ; Schumacher, B. ; Warnecke, P.
Author_Institution :
Physikalisch Tech. Bundesanstalt, Braunschweig, Germany
fDate :
June 27 1994-July 1 1994
Abstract :
A cryogenic current comparator (CCC) of the Delahaye-type is used to scale the unit of resistance between 1 /spl Omega/ and 1 M/spl Omega/ in terms of R/sub K-90/. Measurements are demonstrated to check the accuracy and reproducibility of the system. Especially for the values above 10 k/spl Omega/ the uncertainty of the maintained standards could be reduced by more than one order of magnitude compared to conventional scaling methods.<>
Keywords :
comparators (circuits); electric resistance measurement; low-temperature techniques; measurement standards; scaling circuits; 1 ohm to 1 Mohm; Delahaye-type; cryogenic current comparator; resistance scaling; standards; Bridges; Coils; Copper; Cryogenics; Electrical resistance measurement; Immune system; Personal communication networks; Resistors; SQUIDs; Wire;
Conference_Titel :
Precision Electromagnetic Measurements, 1994. Digest., 1994 Conference on
Conference_Location :
Boulder, CO, USA
Print_ISBN :
0-7803-1984-2
DOI :
10.1109/CPEM.1994.333260
