本欧洲标准规定了用于气体体积测量的旋转排气量计（以下简称“仪表”或“米”）的范围，结构，性能，输出特性和试验。 本欧洲标准适用于用于测量至少第一，第二和第三气体系列的燃料气体体积的旋转位移燃气表，其组成在EN 437:2003 A1:2009中规定，最大工作压力至少包括20巴，环境温度范围至少在-10°C至40°C。 本欧洲标准适用于安装在振动和震动低的地方的仪表 •闭合位置（室内或室外，具有制造商规定的保护），具有冷凝或非冷凝湿度 或者，如果制造商规定， •开放位置（室外无覆盖），冷凝湿度或非冷凝湿度; 除非本标准另有规定: 所有使用的压力都是量规; 所有影响量除了被测试者的参考值保持相对恒定。 该欧洲标准也适用于具有最大允许压力PS和体积V小于6 000巴/升的仪表，或与

This European Standard specifies ranges, construction, performances, output characteristics and testing of rotary displacement gas meters (hereinafter referred to as RD meters or simply meters) for gas volume measurement. This European Standard applies to rotary displacement gas meters used to measure the volume of fuel gases of at least the 1st, 2nd and 3rd gas families, the composition of which is specified in EN 437:2003+A1:2009, at a maximum working pressure up to and including 20 bar over an ambient and gas temperature range of at least −10 °C to +40 °C. This European Standard applies to meters that are installed in locations with vibration and shocks of low significance and in • closed locations (indoor or outdoor with protection as specified by the manufacturer) with condensing or with non-condensing humidity or, if specified by the manufacturer, • open locations (outdoor without any covering) with condensing humidity or with non-condensing humidity; Unless otherwise specified in this standard: • all pressures used are gauge; • all influence quantities, except the one under test, are kept relatively constant at their reference value. This European Standard also applies to meters with a maximum allowable pressure PS and the volume V of less than 6 000 bar • litres or with a product of PS and DN of less than 3 000 bar. NOTE These limits are the same as in EU directive 97/23/EC. This European Standard can be used for both pattern approval and individual meter testing. Cross-reference tables are given in: • Annex A for the tests that need to be undertaken for pattern approval; • Annex B for individual meter testing. Some parts of this standard cover meters with mechanical index only. The risk philosophy adopted in this standard is based on the analysis of hazards on account of pressure. The standard applies principles to eliminate or reduce hazards. Where these hazards cannot be eliminated appropriate protection measures are specified.