Predicted impact of latest h and e values on resistance and voltage traceability in the new SI (Systeme International)

Published

October 2, 2014

Author(s)

Nick Fletcher, Gert Rietveld, James K. Olthoff, Ilya F. Budovsky

Abstract

This paper considers the impact of the planned redefinition of the SI on electrical traceability, with a focus on resistance and voltage calibration. The new SI will replace the 1990 values for the critical constants RK and KJ. With the present state of experimental data, we can say with good confidence that the required relative changes will be of order the 2×10−8 for RK and 10×10−8 for KJ. These changes will only be visible for a small number of top-level standards in NMIs and industry. Thus, no disruption in traceability is anticipated due to this change and this paper is part of a communication campaign by the CCEM to ensure a smooth transition.

Conference Dates

August 24-29, 2014

Conference Location

Rio de Janeiro, BR

Conference Title

Conference on Precision Electromagnetic Measurements

Pub Type

Conferences

Download Paper

DOI Link

Keywords

SI, traceability, electrical units, voltage, resistance, fundamental constants

Citation

Fletcher, N. , Rietveld, G. , Olthoff, J. and Budovsky, I. (2014), Predicted impact of latest h and e values on resistance and voltage traceability in the new SI (Systeme International), Conference on Precision Electromagnetic Measurements, Rio de Janeiro, BR, [online], https://doi.org/10.1109/CPEM.2014.6898444 (Accessed October 20, 2025)