Title :
A low-frequency current comparator for precision resistance measurements
Author :
Satrapinski, A. ; Pontynen, H. ; Gotz, Martin ; Pesel, Eckart ; Fletcher, Nick ; Goebel, R. ; Rolland, Benjamin
Author_Institution :
Centre for Metrol. & Accreditation, MIKES, Espoo, Finland
Abstract :
Two prototypes of a current comparator for operation at low frequencies in the 0.1 Hz to 1 Hz range and at room temperature have been realized. Experimental tests include the determination of the frequency-dependent sensitivity and a comparative measurement of the ratio of two standard resistors with nominal values of 1 kΩ and 100 Ω. The realized current comparator is the main ratio standard in a precision ac resistance bridge operated without need of liquid helium which will be one of the main measurement instruments for a future graphene-based quantum Hall resistance standard.
Keywords :
current comparators; electric resistance measurement; resistors; frequency 0.1 Hz to 1 Hz; frequency-dependent sensitivity; graphene-based quantum Hall resistance standard; liquid helium; low-frequency current comparator; precision AC resistance bridge; precision resistance measurement; resistance 1 kohm to 100 ohm; resistor; temperature 293 K to 298 K; Current measurement; Electrical resistance measurement; Resistance; Resistors; Sensitivity; Standards; Windings; CCC; Resistance measurement; current comparator; low frequency; measurement uncertainty; sensitivity;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4799-5205-2
DOI :
10.1109/CPEM.2014.6898608
