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New and revised EURAMET Calibration Guidelines

EURAMET has published more than 20 calibration guidelines to date, these are aimed at improving harmonisation for measurement instrument calibrations.

New additions include a new ‘Calibration of Autocollimators’ guideline and revisions to: ‘Calibration of Temperature Block Calibrators’; ‘Calibration of Temperature and / or Humidity Controlled Enclosures’ and ‘Calibration of Electromechanical and Mechanical Manometers’.

  • NEW Guideline No. 22 ‘Calibration of Autocollimators’ was developed for angle measuring instruments by the EMRP project ‘Angle Metrology’, in collaboration with EURAMET’s Technical Committee for Length and the EURAMET Board of Directors.

Autocollimators are used for measuring precise and non-contact angular displacements of a mirror or other similar reflecting surface. These devices are well suited to a broad range of applications both in measurement and industrial manufacturing where measurements of straightness, parallelism and rectangularity of machine tools are important.


Guideline ‘Calibration of Autocollimators’ is intended for precise calibration of electronic autocollimators but can also be used for calibration of analogue autocollimators. It includes general definitions and technical requirements for autocollimator calibrations, an example of a typical calibration procedure and practical advice for laboratories performing calibrations.


Guidelines No. 13 and No. 20 have been revised by the EURAMET Technical Committee for Thermometry.
These guidelines are recommended for Accreditation Bodies use. Their purpose is to increase harmonisation and to enhance the equivalence and mutual recognition of calibration results obtained by laboratories.

This guideline applies to all electromechanical manometers used for measuring absolute, positive and negative gauge and differential pressures, as well as to bourdon tube manometers Guideline No. 17 has been revised by EURAMET’s Technical Committee for Mass and Related Quantities.

All EURAMET calibration guidelines, including the new and revised ones, are available on EURAMET's website: https://www.euramet.org/calibration-guidelines

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