Title :
Resistance scaling up to 1 MΩ at PTB with a cryogenic current comparator
Author :
Pesel, E. ; Schumacher, B. ; Warnecke, P.
Author_Institution :
Physikalisch Tech. Bundesanstalt, Braunschweig, Germany
fDate :
4/1/1995 12:00:00 AM
Abstract :
A cryogenic current comparator (CCC) of the Delahaye type (1989) is used to scale the unit of resistance between 100 Ω and 1 MΩ in terms of RK-90. Measurements are demonstrated to check the accuracy and reproducibility of the system. Particularly for values above 10 kΩ the uncertainty of measurement of the maintained standards can be reduced by more than one order of magnitude compared with conventional scaling methods
Keywords :
SQUIDs; bridge circuits; cryogenic electronics; current comparators; electric resistance measurement; measurement standards; 1 Mohm; Delahaye; PTB; cryogenic current comparator; measurement standards; reproducibility; resistance scaling; unit of resistance; Cryogenics; Electrical resistance measurement; Immune system; Measurement standards; Personal communication networks; Reproducibility of results; Resistors; Superconducting filaments and wires; Uncertainty; Voltage;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
