Ratio Calibration of a Digital Voltmeter for Force Measurement Using the Programmable Josephson Voltage Standard

Published

July 1, 2007

Author(s)

Yi-hua D. Tang, June E. Sims

Abstract

Ratio calibration for a digital voltmeter (DVM) is critical for some applications such as force measurement. The NIST DVM ratio service has provided ratio voltage measurements that are traceable to the Josephson Voltage Standard (JVS). Previously, the service was supported by NIST JVS systems using manual measurements. The NIST JVS uses a conventional Josephson junction array which often experiences a spontaneous step transition, caused by electromagnetic interference, during its operation. An adjustment is required to obtain a stable voltage step for the ratio calibration. The programmable JVS (PJVS), developed in the last decade, uses an array with non-hysteretic steps to provide a stable voltage. The PJVS was implemented DVM ratio calibration service to improve the efficiency and reliability of the service. The new protocol can be executed automatically to reduce the labor cost of the calibration service. The uncertainty of the DVM ratio calibration can be improved by taking automatic multiple measurements. This paper describes the DVM ratio calibration procedure and compares the conventional JVS and PJVS protocols. Results of an actual DVM ratio calibration are presented.

Conference Dates

July 29-August 2, 2007

Conference Location

Saint Paul, MN, USA

Conference Title

NCSL International Workshop and Symposium

Pub Type

Conferences

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Keywords

automation, digital voltmeter, force measurement, Josephson voltage standard, programmable Josephson voltage standard, ratio calibration, uncertainty

Citation

Tang, Y. and Sims, J. (2007), Ratio Calibration of a Digital Voltmeter for Force Measurement Using the Programmable Josephson Voltage Standard, NCSL International Workshop and Symposium, Saint Paul, MN, USA, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32647 (Accessed November 8, 2024)