Title :
A precise measurement of QHR in NIM
Author :
Zhang Zhonghua ; Wang Dengan ; Hu Zhi ; Zhen Jiu ; He Qing ; Bliek, L. ; Hein, G. ; Kowalski, W. ; Ebeling, K.J. ; Bruus, H.
Author_Institution :
Nat. Inst. of Metrol., Beijing, China
Abstract :
Equipment for the precise measurement of quantized Hall resistance (QHR) is described. The essential components of this equipment are a resistance comparator of one to one ratio with a comparison uncertainty of 3*10/sup -8/ and two specially designed resistor networks for determination of the ratio between 12906.4 Omega of QHR at i=2 and 10 k Omega or 1 k Omega . The transfer procedure from QHR to 10 k Omega can be completed easily with this equipment by a few steps of one-to-one comparison, with a total uncertainty of 5*10/sup -8/.<>
Keywords :
electric resistance measurement; measurement standards; quantum Hall effect; 1 kohm; 10 kohm; 12906.4 ohm; NIM; measurement standard; quantized Hall resistance; resistance comparator; resistor networks; Automatic control; Battery charge measurement; Circuits; Electrical resistance measurement; Helium; Metrology; Potentiometers; Resistors; Switches; Voltage measurement;
Conference_Titel :
Precision Electromagnetic Measurements, 1990. CPEM '90 Digest., Conference on
Conference_Location :
Ottawa, Ontario, Canada
DOI :
10.1109/CPEM.1990.110050
