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3. Permissible effect of disturbances

Directive 2014/32/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of measuring instruments (recast) Text with EEA relevance · European Union

The effect of an electromagnetic disturbance on a gas meter or volume conversion device shall be such that: the change in the measurement result is no greater than the critical change value as defined in point 3.1.3, or the indication of the measurement result is such that it cannot be interpreted as a valid result, such as a momentary variation that cannot be interpreted, memorised or transmitted as a measuring result. After undergoing a disturbance, the gas meter shall: recover to operate within MPE, and have all measurement functions safeguarded, and allow recovery of all measurement data present just before the disturbance. The critical change value is the smaller of the two following values: the quantity corresponding to half of the magnitude of the MPE in the upper zone on the measured volume; the quantity corresponding to the MPE on the quantity corresponding to one minute at maximum flowrate. Under installation conditions specified by the manufacturer, the effect of the flow disturbances shall not exceed one third of the MPE.

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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.