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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Measurement standard, international

Standard recognised by an international agreement to serve internationally as the basis for assigning values to other standards of the quantity concerned.

Measurement standard, maintenance

Set of operations necessary to preserve the metrological characteristics of a measurement standard within appropriate limits.

Measurement standard, national

Standard recognised by a national decision to serve in a country as the basis for assigning values to other standards of the quantity concerned.

Measurement Uncertainty

"A parameter associated with the result of a measurement, that characterizes the dispersion of the values that could reasonably be attributed to the measurand."

Measurement unit

See Unit of measurement. A particular quantity, defined and adopted by convention, with which other quantities of the same kind are compared in order to express their magnitudes relative to that quantity.

Measuring chain

Series of elements of a measuring instrument or measuring system that constitutes the path of the measurement signal from the input to the output.

Measuring error

Result of a measurement minus a true value of the measurand.

Measuring error, absolute

When it is necessary to distinguish “error” from “relative error” the former is sometimes called “absolute error of measurement”.

Measuring instrument

Device intended to be used to make measurements, alone or in conjunction with supplementary devices.

Measuring range

Set of values of measurands for which the error of a measuring instrument is intended to lie within specified limits.

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