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We present an uncertainty evaluation of a new cryogenic current comparator (CCC) bridge that is designed to compare two-terminal 1 and 10 MOmega standard resistors with the quantized Hall resistance (QHR) and scale from these decade values to other decade values between 10 kOmega and 1 GOmega. Use of the bridge over a wide range of resistance values results in a spectrum of dominant contributions to the uncertainty budget, and this analysis helps determine the optimum parameters of the measurements. Our theoretical analysis is compared with experimental data.
Instrumentation and Measurement, IEEE Transactions on (Volume:58 , Issue: 4 )
Date of Publication: April 2009