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Uncertainty Evaluation in a Two-Terminal Cryogenic Current Comparator

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2 Author(s)
Bierzychudek, M.E. ; Electr. Div., Inst. Nac. de Tecnol. Ind., San Martin ; Elmquist, R.E.

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.

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Instrumentation and Measurement, IEEE Transactions on  (Volume:58 ,  Issue: 4 )