Quantification of Misunderstanding: A Case of Tolerance Limits against Calibration Uncertainty in ISO/IEC 17025 Accredited Laboratories

Filip Flego, Marija Pavlović, Siniša Prugovečki

Abstract

Measurement uncertainty undoubtedly plays a large role in the assessment of compliance with certain specifications. For example, the widely accepted ILAC G8:09/19 publication gives relatively flexible guidelines for assessing the conformity of certain instruments to their respective standards or specifications. On the other hand, the information given in calibration certificates is often interpreted too rigorously which can, unfortunately, lead to the false conclusion that the instrument in question doesn’t actually meet the client’s specified requirements. In the following paper we will examine the role measurement uncertainty has in the assessment of compliance with regards to specified tolerance limits for 5 different instruments: calipers, contact thermometers (at temperatures above 600 °C), hygrometers, temperature chambers (such as laboratory incubators or refrigerators) and piston pipettes.

Keywords

Measurement uncertainty, Calibration, Compliance, Tolerance limits

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IMEKO-TC10-2020-045.pdf

DOI

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IMEKO TC

TC10 - Measurement for Diagnostics, Optimization and Control

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