Comparison of the Josephson voltage standards of the Centro Espanol de Metrologia and the Bureau International des Poids et Mesures

摘要

Comparisons of the 1 V Josephson array voltage standard of the Bureau International des Poids et Mesures were made with that of the Centro Espanol de Metrologia, Madrid, Spain in October 1997. The results agree within an overall uncertainty of less than 1 nV.