本欧洲标准规定了表1中描述的用于确定燃料气体能量的转换装置的构造，性能，安全性和一致性的要求和测试，包括根据EN 437的第1和第2族的燃料气体的能量。 本标准中考虑的能量转换装置（ECD）由能量计算器（EC）组成，并与以下装置和/或功能相关: - 用于高精度测量的符合EN 12405-1或prEN 12405-3的音量转换装置（VCD）或用作燃气表转换的流量计算机; - 热值确定装置（CVDD）。 不包括在上述标准中的设备的型式认可测试要求在表6中规定的适当附件中进行了说明。 为了本欧洲标准的目的，术语“音量转换装置”（VCD）包括流量计算机（FC）。 单个计算器可以承担不同计量线的音量转换功能

This European Standard specifies the requirements and tests for the construction, performance, safety and conformity of conversion devices used to determine the energy of fuel gases described in the Table 1, including those of the 1st and 2nd families according to EN 437. The energy conversion device (ECD) considered in this standard consists of an energy calculator (EC) and is associated with the following devices and/or functions: - a volume conversion device (VCD) or a flow computer used as gas meter conversion, either conforming to EN 12405-1, or to prEN 12405-3, for high accuracy measurements; - a calorific value determination device (CVDD). Requirements for type approval tests of the devices, not included in the above-mentioned standards are described in appropriate annexes specified in Table 6. For the purpose of this European Standard, the term "volume conversion devices" (VCDs) includes flow computers (FCs). A single calculator may undertake the volume conversion functions for different metering lines.