Definitions of Metrology terms & phrases.
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Maintenance of a measurement standard
Set of measures necessary to preserve the metrological characteristics of a measurement standard within appropriate limits.
used to enforce legal metrology
Device intended to reproduce or supply, in a permanent manner during its use, one or more known values of a given quantity. e.g. a weight, a volume measure, a gauge block, or a reference material.
Maximum permissible errors (of a measuring instrument)
Extreme values of an error permitted by specifications, regulations, etc. for a given measuring instrument.
Particular quantity subject to measurement.
Device intended to take a measurement, alone or in conjunction with supplementary devices.
Set of operations for the purpose of determining the value of a quantity.
Set of operations, described specifically, used in the performance of particular measurements according to a given method.
Measurement standard, etalon
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.