标准摘要
[中文适用范围]： 本文件提供了用于计量气体和气体混合物的热式质量气体流量计的规格、测试、检查、安装、操作和校准指南。 它不适用于使用热式质量流量计测量液体质量流量。 本文件不适用于热线和其他热膜风速计，也用于进行点速度测量。 [外文原描述]： This document gives guidelines for the specification, testing, inspection, installation, operation and calibration of thermal mass gas flowmeters for the metering of gases and gas mixtures. It is not applicable to measuring liquid mass flowrates using thermal mass flowmeters. This document is not applicable to hot wire and other hot film anemometers, also used in making point velocity measurements.
英文名称Measurement of fluid flow in closed conduits — Thermal mass flowmeters