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Standards Development
This document specifies general principles for a verification of measurement performance based on repeated measurements and their statistical evaluation. The key parameters are the mean value and the empirical standard deviation.
The result of this verification is pass or fail by comparing statistical key parameters to defined limits. The result is not a measurement uncertainty, thus cannot be used for further measurement uncertainty calculation or considerations such as comparison of measurement results or metrological traceability.
This document is applicable to type tests for a possible offset (bias) and repeatability, including an option to consider the effect of influence quantities. Therefore, this document provides a two -step method. However, the presented statistical method is conceivable for other pass or fail decisions
Coming from the development of a new version of IEC 61557 -12 and the new subsequent document
IEC 61557-12-2 for testing in TC85/WG20, the need for a more general statistical method in
performance class verification was identified.
In the context of functional type tests, the intention is to establish a clear and common
understanding of terminology, unambiguous instructions and recommendations for action in
practice.
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