From the error curve to the measurand

Authors Paweł Fotowicz - Central Office of Measures (Główny Urząd Miar)

curve of error history of metrology measurement uncertainty

Abstract

Evaluation of measurement data in metrology is associated with term of measurement uncertainty. The measurement uncertainty is a parameter characterizing the dispersion of the quantity values being attributed to a measurand. The measurand is a quantity intended to be measured and is expressed as an output quantity in a measurement model. This quantity is treated as a set of possible values expressing a measurement result. Mathematically the measurand is a random variable calculated by the propagation of distributions through the measurement model. Usually, the measurement model is the form of measurement equation consists of many components. Any component is also a random variable with a prescribed probability distribution. One component is associated with a series of observations as a random effect, but another components are an systematic effect. Historically, the first of this components was associated with curve of error.

Bibliography

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Metrology and Hallmark is devoted to the multidisciplinary study and practice of high accuracy engineering and metrology. The journal takes novel achievements in all fields of measurement and instruments science & technology.

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Volume 7