UNCERTAINTY EVALUATION FOR THE CALIBRATION OF DIRECT ACTING INDICATING ANALOGUE ELECTRICAL MEASURING INSTRUMENTS

T. Goto

Abstract

In the case of calibration of direct acting indicating analogue electrical measuring instruments (hereinafter called the "analogue instruments"), uncertainty budget largely depends on dispersion of readings for scales through a needle. This paper describes experimental results for three levels of voltage (10 V, 6 V, and 3 V) of analogue instruments. In the experiments, two way layout nested design was introduced for each voltage level. From the results of present experiments, it was revealed that expanded uncertainties obtained were about 1/3 for the specification that obtained from the past experience.

Keywords

direct acting indicating analogue measuring instruments, nested design, ANOVA

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IMEKO-WC-2012-TC4-O28.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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