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Improvement of Leakage Resistance of PJVS for NIST-4 Watt Balance Experiment



Yi-hua D. Tang, Frank C. Seifert, Stephan Schlamminger


A Programmable Josephson Voltage Standard (PJVS) system is used for the voltage measurements in NIST-4 Watt balance experiment. It is critical to enhance the leakage resistance of the PJVS in order to achieve the uncertainty of voltage measurements better than 1 part in 10^9. This paper describes how to modify the NIST-4 PJVS system to isolate the bias electronics and quantify its resistance to ground. Direct comparison between the Watt Balance PJVS (WPJVS) and NIST Volt Lab PJVS (VPJVS) was carried out to verify the performance of WPJVS with improved isolation resistance to the ground.
Proceedings Title
CPEM 2016 Conference Digest
Conference Dates
July 10-15, 2016
Conference Location


bias electronics, isolation transformer, leakage resistance, programmable Josephson voltage standard, uncertainty


Tang, Y. , Seifert, F. and Schlamminger, S. (2016), Improvement of Leakage Resistance of PJVS for NIST-4 Watt Balance Experiment, CPEM 2016 Conference Digest, Ottawa, -1, [online], (Accessed May 21, 2024)


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Created July 10, 2016, Updated November 29, 2019