INCREASING THE MEASUREMENT ACCURACY AT LOW FREQUENCIES BY SUCCESSIVE EXTRACTION OF THE ABSOLUTE MEAN VALUE

U. Pogliano

Abstract

A method for the precision measurement of the RMS value of a low frequency voltage signal is described in this paper. The method consists in one or more stages that perform basically the same function, even if they can differ for the level of accuracy required. Each stage performs: the determination of the absolute value as function of time and the extraction of its mean value. Actual realization by means of an electronic circuit shows that accuracy at the level of 1 part in 10⁴ can be easily reached.

Keywords

AC measurement, voltmeters, analogic signal processing

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IMEKO-TC4-2001-070.pdf

DOI

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IMEKO TC

TC4 - Measurement of Electrical Quantities

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