Comparison of the Josephson voltage standards of the METAS and the BIPM (part of the ongoing BIPM key comparison BIPM.EM-K10.a and b)

Abstract

A comparison of the Josephson array voltage standards of the Bureau International des Poids et Mesures (BIPM) and the Federal Office of Metrology (METAS), Bern, Switzerland, was carried out in January 2012 at the level of 1 V and 10 V. For this exercise, options A and B of the BIPM.EM-K10 comparison protocol were applied. Option B required the BIPM to provide a reference voltage for measurement by METAS using its Josephson standard with its own measuring device. Option A required METAS to provide a reference voltage for measurement by the BIPM using its analogue detector and associated measurement loop. In both cases the BIPM array was kept floating from ground.The final results were in good agreement with the combined relative standard uncertainty of 1.00 parts in 1010 for the nominal voltage of 10 V and 4.3 parts in 1010 for the nominal voltage of 1 V.Main text.To reach the main text of this paper, click on Final Report. Note that this text is that which appears in Appendix B of the BIPM key comparison database kcdb.bipm.org/.The final report has been peer-reviewed and approved for publication by the CCEM, according to the provisions of the CIPM Mutual Recognition Arrangement (CIPM MRA).