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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Accredited laboratory

Laboratory with 3rd party approval of the laboratory’s technical competence, the quality assurance system it uses, and its impartiality.

Accuracy class

Class of measuring instruments that meet certain metrological requirements intended to keep errors within specified limits.

Accuracy of a measuring instrument

The ability of a measuring instrument to give responses close to a true value.

Accuracy of measurement

Closeness of the agreement between the result of a measurement and a true value of the measurand.

Adjustment of a measuring instrument

Process that brings a measuring instrument into a functional condition. corresponding to the purpose for which it is used.


Asia-Pacific Economic Cooperation.


Asia-Pacific Laboratory Accreditation Cooperation


Asia-Pacific Legal Metrology Forum


Asia-Pacific Metrology Programme


An object fashioned by human hand. Examples of artefacts made for taking measurements are a weight and a measuring rod.

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