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A two-way Josephson voltage standard (JVS) direct comparison between the National Institute of Standards and Technology (NIST) and the National Research Council (NRC) has been conducted. The process consists of two comparisons, one using NIST designed hardware and software and the other using NRC designed hardware and software. The results of the two comparisons are in agreement to within 0.7 nV and...
The progress in developing Josephson voltage system contributes an increasing in the accuracy of the voltage unit transfer. Using the different methods during voltage standard key comparisons allows defining accuracy of compared standard with uncertainty, differing in 10-100 once. Some issues concerning measurement procedure to follow in voltage key comparison are discussed.
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