Measurement uncertainty improvement on electric current sources calibration using precision shunts

Authors

  • Marcelo Costa Eletrobras Eletronorte

DOI:

https://doi.org/10.21014/actaimeko.v14i2.1964

Keywords:

electric current calibration, indirect calibration, precision shunts, measurement uncertainty

Abstract

This paper presents the improvement in measurement uncertainty in the calibration of electric current sources obtained by replacing the direct measurement method, using a precision digital ammeter, with an indirect method that uses precision shunts and a precision voltmeter. An analysis of the sources of uncertainty that should be considered in this indirect method is also performed. Finally, two examples of indirect calibration of a precision current source using a precision shunt as standard are shown and their results are compared with the results of direct calibrations, highlighting the reduction in measurement uncertainty.

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Published

2025-06-26

Issue

Vol. 14 No. 2 (2025)

Section

Research Papers

License

Copyright (c) 2025 Marcelo Costa

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