标准摘要
[中文适用范围]： 本文件规定了非侵入式（夹式）超声波流量计 (USM) 的要求和建议，这种流量计使用超声波信号的传输时间来测量封闭管道中的体积流量。传输时间流量计主要用于单相流体（液体和气体），但也可用于存在少量附加相的情况。本文件规定了性能、校准和输出特性，并涉及安装条件。 [外文原描述]： This document specifies requirements and recommendations for non-intrusive (clamp-on) ultrasonic flowmeters (USMs), which use the transit time of ultrasonic signals to measure the volumetric flowrate in closed conduits. Transit time flowmeters are predominantly used on single-phase fluids (liquid and gases) but can also be used where small quantities of additional phases are present. This document specifies performance, calibration, and output characteristics, and deals with installation conditions.
英文名称Measurement of fluid flow in closed conduits — Clamp-on ultrasonic transit-time meters for liquids and gases