Comparisons of 10-V Josephson array voltage standards between the BNM/LCIE and the BIPM

A comparison of the 10 V Josephson array voltage standards of the BNM/LCIE and of the BIPM has been carried out. An indirect comparison using Zener-diode based voltage references as transfer standards shows an agreement of 5 parts in 10/sup 9/ with an uncertainty (1/spl sigma/) of the same value. On-site indirect and direct comparisons show no difference between the two standards within the total uncertainty of 1.2 parts in 10/sup 10/.<
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