Establishment of 10-V Josephson array voltage standard

The use of 10-V Josephson voltage standard based on 10-V array enables us more convenient and reliable 10-V calibration compared to 10:1 divider system at KRISS. Consistency between the two systems was successfully tested with using a 10-V Zener voltage standard. The uncertainty of the new 10-V Josephson array system was estimated to be less than 0.01/spl times/10/sup -6/(k=2).