INMETRO’S PRIMARY AC-DC CURRENT TRANSFER STANDARD BASED ON PMJTCS

R. Afonso, M. Klonz, R. M. Souza, R. P. Landim

Abstract

This paper describes the new primary standard for the ac-dc current transfer at Inmetro, based on PMJTCs and the new shunts manufactured by Fluke for rated currents from 10 mA up to 20 A. The build-up of the ac-dc current scale is described together with the uncertainty budgets which result in final uncertainties at 5 A of 6 μA/A to 12 μA/A in the frequency range from 10 Hz to 100 kHz. These are small compared to international standards.

Keywords

ac-dc difference, PMJTC, comparison

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IMEKO-TC4-2011-049.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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