DEFINITIONS

Measurand The measurand is the particular quantity subject to measurement. Influence quantity An influence quantity is a quantity that is not the measurand but that affects the result of measurement. Rated Operating Conditions The rated operating conditions are the values for the measurand and influence quantities making up the normal working conditions of an instrument. Disturbance An influence quantity having a value within the limits specified in the appropriate requirement but outside the specified rated operating conditions of the measuring instrument. An influence quantity is a disturbance if for that influence quantity the rated operating conditions are not specified. Critical change value The critical change value is the value at which the change in the measurement result is considered undesirable. Material Measure A material measure is a device intended to reproduce or supply in a permanent manner during its use one or more known values of a given quantity. Direct sales A trading transaction is direct sales if: the measurement result serves as the basis for the price to pay; and at least one of the parties involved in the transaction related to measurement is a consumer or any other party requiring a similar level of protection; and all the parties in the transaction accept the measurement result at that time and place. Climatic environments Climatic environments are the conditions in which measuring instruments may be used. To cope with climatic differences between the Member States, a range of temperature limits has been defined. Utility A utility is regarded as a supplier of electricity, gas, thermal energy or water.

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Source: EUR-Lex (Cellar) · retrieved 2026-11-06 · Text as adopted (Official Journal); later amendments are not incorporated in this text.