QIMT Glossary

Definitions of Metrology terms & phrases.

If you know of a term or phrase that belongs here, you can submit the term or phrase and associated definition by adding an entry. NOTE: All entries are reviewed and approved prior to being seen by others on the site.

Procedure for adding a Definition:

  1. Click on the "Add a New Entry" button.
  2. Under the first required field labeled 'Concept', enter the Metrology word or term.
  3. In the 'Description' Field, put the definition, don't forget to use the "DeWord" button to remove MS Word formatting if you are copying and pasting from MS Word; see lounge forum for note regarding this issue.
  4. Ignore the other entries and submit.

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Conférence Générale des Poids et Mesures. Held for the first time in 1889. Meeting every 4th year.

Check standard

Working standard routinely used to ensure that measurements are made correctly.


Comité Internationale des Poids et Mesures.



Calibration and Measurement Capabilities


Czech Metrology Institute, the national metrological institute of the Czech Republic.

Compound standard

Set of similar material measures or measuring instruments that, through their combined use, constitutes a standard.

Conformity assessment

An activity that provides demonstration that specified requirements relating to a product, process, system, person or body are fulfilled, i.e. testing, inspection, certification of products, personnel and management systems.

Conventional true value (of a quantity)

Value attributed to a particular quantity and accepted, sometimes by convention, as having an uncertainty appropriate for a given purpose. Sometimes called “assigned value”, “best estimate of the value”, “conventional value”, or “reference value”.


Euro-Asian cooperation of national metrological institutions.

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