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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Browse the glossary using this index

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T

Transfer standard

Standard used as an intermediary to compare standards.

Travelling standard

True value (of a quantity)

The indefinite form rather than the definite form is used in connection with true value, in that there can be many values that are consistent with the definition of a particular quantity.

U

Uncertainty of measurement

Parameter, associated with the result of a measurement that characterises the dispersion of values that could reasonably be attributed to the measurand. The estimation of uncertainty in accordance with GUM guidelines is usually accepted.

Unit (of measurement)

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.

Unit of measurement (derived) coherent

Derived unit of measurement that can be expressed as the product of basic units in powers with the proportionality coefficient 1.

V

Value (of a measurand), transformed

Value of a measuring signal that represents a given measurand.

Value (of a quantity)

Magnitude of a particular quantity generally expressed as a unit of measurement multiplied by number.

Value, nominal

Rounded or approximate value of a characteristic of a measuring instrument that provides a guide to its use.

Values, derived

Conditions for use intended to keep the metrological characteristics of a measuring instrument specified limits.

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