煤气表.换算装置.体积换算

标准编号：BS EN 12405-1-2005+A2-2010

提出单位：BSI

起草单位：BSI

发布日期：2005年

实施日期：20050628

主      题：一致性 合格测试 定义(术语) 设计 电气工程 电子仪器 电子测量装置 煤气表 燃气技术 燃气表 仪表用变压器 作标记 测量范围 压力 压力变送器 生产 定量测定 数量转换 实际油气比 安全性 规范(验收) 温度 试验 中继器 发射机 体积 

中国标准分类号：Q82

国际标准分类号：91_140_80

摘      要：This European Standard specifies the requirements and tests for the construction, performance, safety and conformity of gas-volume electronic conversion devices associated to gas meters, used to measure volumes of fuel gases of the 1st and 2nd families according to EN *** European Standard is intended for type testing, the detailed relevant provisions of which are given in Annex A. Only three kinds of conversion are treated in this European Standard:? conversion as a function of temperature only (called T conversion);? conversion as a function of the pressure and of the temperature with constant compression factor (called PT conversion);? conversion as a function of the pressure, the temperature and taking into account the compression factor (called PTZ conversion).This document is not relevant to temperature conversion integrated into gas meters which only indicate the converted *** 12405-2 for energy conversion is in ***-volume conversion devices consist of a calculator and a temperature transducer or a calculator, a temperature transducer and a pressure transducer locally *** application of this European Standard, a conversion device may be, as a choice of the manufacturer, considered as a complete instrument (Type 1) or made of separate elements (Type 2), according to the definitions given in 3.1.18.1 and *** this last case, the provisions concerning pressure transducers, temperature sensors and temperature transducers are given in Annexes B, C and D *** conversion device can provide an error curve correction for a gas *** When rendering an account to an end user the readings from the conversion device can be used in conjunction with the readings from a gas meter conforming to EN 1359, EN 12480, or EN 12261, as appropriate, or to any other appropriate andrelevant international or national standard for gas meters, without prejudice of national regulations.