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Calibration and Verification: Two Procedures Having Comparable Objectives and Results



K D. Sommer, S E. Chappell, M Kochsiek


The most important actions to ensure the correct indication of measuring instruments are:--In industrial metrology, regular calibration of the measuring instruments according to the implemented quality systems; and--In legal metrology, periodic verification or conformity testing of the instruments according to legal regulations.Both actions are strongly interrelated and are predominantly based on the same measuring procedures. Historically, however, these actions have been established with separate rules, metrological infrastructures and activities. This paper, therefore, addresses the differences, common basis and the relationship between calibration and verification. In particular, the relationships between legally prescribed error limits and uncertainty and the uncertainty contribution of verified measuring instruments are discussed.
International Organization of Legal Metrology (OIML)
No. 1


calibration, industrial metrology, legal metrology, maximum permissible errors, measuring instruments, traceability of standards, uncertainty, verification


Sommer, K. , Chappell, S. and Kochsiek, M. (2001), Calibration and Verification: Two Procedures Having Comparable Objectives and Results, International Organization of Legal Metrology (OIML) (Accessed May 24, 2024)


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Created January 1, 2001, Updated February 17, 2017