quantity in a conventionally chosen subset of a given system of quantities, where no subset quantity can be expressed in terms of the others

Notes click to expand contents

NOTE 1 The subset mentioned in the definition is termed the “set of base quantities”.

EXAMPLE The set of base quantities in the International System of Quantities (ISQ) is given in 1.6.

NOTE 2 Base quantities are referred to as being mutually independent since a base quantity cannot be expressed as a product of powers of the other base quantities.

NOTE 3 'Number of entities' can be regarded as a base quantity in any system of quantities.

1 Quantities and units click to expand contents

2 Measurement click to expand contents

2.1 measurement
2.2 metrology
2.3 measurand
2.4 measurement principle
2.5 measurement method
2.6 measurement procedure
2.7 reference measurement procedure
2.8 primary reference measurement procedure
2.9 measurement result
2.10 measured quantity value
2.11 true quantity value
2.12 conventional quantity value
2.13 measurement accuracy
2.14 measurement trueness
2.15 measurement precision
2.16 measurement error
2.17 systematic measurement error
2.18 measurement bias
2.19 random measurement error
2.20 repeatability condition of measurement
2.21 measurement repeatability
2.22 intermediate precision condition of measurement
2.23 intermediate measurement precision
2.24 reproducibility condition of measurement
2.25 measurement reproducibility
2.26 measurement uncertainty
2.27 definitional uncertainty
2.28 Type A evaluation of measurement uncertainty
2.29 Type B evaluation of measurement uncertainty
2.30 standard measurement uncertainty
2.31 combined standard measurement uncertainty
2.32 relative standard measurement uncertainty
2.33 uncertainty budget
2.34 target measurement uncertainty
2.35 expanded measurement uncertainty
2.36 coverage interval
2.37 coverage probability
2.38 coverage factor
2.39 calibration
2.40 calibration hierarchy
2.41 metrological traceability
2.42 metrological traceability chain
2.43 metrological traceability to a measurement unit
2.44 verification
2.45 validation
2.46 metrological comparability of measurement results
2.47 metrological compatibility of measurement results
2.48 measurement model
2.49 measurement function
2.50 input quantity in a measurement model
2.51 output quantity in a measurement model
2.52 influence quantity
2.53 correction

3 Devices for measurement click to expand contents

4 Properties of measuring devices click to expand contents

4.1 indication
4.2 blank indication
4.3 indication interval
4.4 nominal indication interval
4.5 range of a nominal indication interval
4.6 nominal quantity value
4.7 measuring interval
4.8 steady-state operating condition
4.9 rated operating condition
4.10 limiting operating condition
4.11 reference operating condition
4.12 sensitivity of a measuring system
4.13 selectivity of a measuring system
4.14 resolution
4.15 resolution of a displaying device
4.16 discrimination threshold
4.17 dead band
4.18 detection limit
4.19 stability of a measuring instrument
4.20 instrumental bias
4.21 instrumental drift
4.22 variation due to an influence quantity
4.23 step response time
4.24 instrumental measurement uncertainty
4.25 accuracy class
4.26 maximum permissible measurement error
4.27 datum measurement error
4.28 zero error
4.29 null measurement uncertainty
4.30 calibration diagram
4.31 calibration curve

5 Measurement standards (Etalons) click to expand contents

5.1 measurement standard
5.2 international measurement standard
5.3 national measurement standard
5.4 primary measurement standard
5.5 secondary measurement standard
5.6 reference measurement standard
5.7 working measurement standard
5.8 travelling measurement standard
5.9 transfer measurement device
5.10 intrinsic measurement standard
5.11 conservation of a measurement standard
5.12 calibrator
5.13 reference material
5.14 certified reference material
5.15 commutability of a reference material
5.16 reference data
5.17 standard reference data
5.18 reference quantity value

[VIM3] 1.4 base quantity