Definitions of Metrology terms & phrases.
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- Ignore the other entries and submit.
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Standard used as an intermediary to compare standards.
See Standard, travelling.
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.
Uncertainty of measurement
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.
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.
Rounded or approximate value of a characteristic of a measuring instrument that provides a guide to its use.
Conditions for use intended to keep the metrological characteristics of a measuring instrument specified limits.