PART II

A volume conversion device constitutes a sub-assembly when it is together with a measuring instrument with which it is compatible. For a volume conversion device, the essential requirements for the gas meter shall apply, if applicable. In addition, the following requirements shall apply: The manufacturer shall specify the base conditions for converted quantities. 0,5 % at ambient temperature 20 °C ± 3 °C, ambient humidity 60 % ± 15 %, nominal values for power supply; 0,7 % for temperature conversion devices at rated operating conditions; 1 % for other conversion devices at rated operating conditions. Note: The error of the gas meter is not taken into account. The volume conversion device shall not exploit the MPEs or systematically favour any party. An electronic conversion device shall be capable of detecting when it is operating outside the operating range(s) stated by the manufacturer for parameters that are relevant for measurement accuracy. In such a case, the conversion device must stop integrating the converted quantity, and may totalise separately the converted quantity for the time it is operating outside the operating range(s). An electronic conversion device shall be capable to display all relevant data for the measurement without additional equipment.

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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.