本文件规定了超声波气体流量计（USM）的要求和建议， 它利用声波信号的传输时间来测量单相均质气体的流量 在封闭的管道中。 本文件适用于用于保管转移和分配的运输时间超声波气体流量计 计量，如全通径、缩小面积、高压和低压仪表或任何组合 其中之一。仪表的最小或最大尺寸没有限制。此文档可以是 用于测量几乎任何类型的气体，如空气、天然气和乙烷。 包括适用于两种精度等级的流量计的流量测量性能要求 适用于监护权转移和分配测量等应用。 本文件规定了仪表验证的结构、性能、校准和诊断， 气体流量测量用超声波流量计的输出特性及安装处理 条件 注:可能适用国家或其他法规，这些法规可能比本法规更严格 文件交叉引用:ISO 5168ISO/IEC 17025lSO 4006IEC 60654-2IEC 61000-2-2IEC 61000-4-6IEC 60068-2-64IEC 61000-4-4IEC 61000-4-17ISO/IEC指南99:2007IEC 61000-4-5IEC 60068-2-30IEC 60068-3-8IEC 61000-4-8IEC 60068-2-31IEC 60068-3-4IEC 60068-2-78IEC 60068-2-47IEC 61000-4-2IEC 60068-2-6IEC 61000-4IEC 61000-4-3IEC 61000-4-4-29IEC 60012-8ISO 60068-1998MS13.2:1996IEC 60068-2-1IEC 60529ISO 80000-4IEC 61000-6-1IEC 60068-3-1IEC 61000-4-1IEC 60068-2-2ISO/IEC指南98-3:2008IEC/TR 61000-2-1lSO 5167-1:2003IEC 61000-4-11购买本文件时提供的所有现行修订版均包含在购买本文件中。

This document specifies requirements and recommendations for ultrasonic gas flowmeters (USMs), which utilize the transit time of acoustic signals to measure the flow of single phase homogenous gases in closed conduits. This document applies to transit time ultrasonic gas flowmeters used for custody transfer and allocation metering, such as full-bore, reduced-area, high-pressure, and low-pressure meters or any combination of these. There are no limits on the minimum or maximum sizes of the meter. This document can be applied to the measurement of almost any type of gas, such as air, natural gas, and ethane. Included are flow measurement performance requirements for meters of two accuracy classes suitable for applications such as custody transfer and allocation measurement. This document specifies construction, performance, calibration, diagnostics for meter verification, and output characteristics of ultrasonic meters for gas flow measurement and deals with installation conditions. NOTE It is possible that national or other regulations apply which can be more stringent than those in this document.Cross References:ISO 5168ISO/IEC 17025lSO 4006IEC 60654-2IEC 61000-2-2IEC 61000-4-6IEC 60068-2-64IEC 61000-4-4IEC 61000-4-17ISO/IEC Guide 99:2007IEC 61000-4-5IEC 60068-2-30IEC 60068-3-8IEC 61000-4-8IEC 60068-2-31IEC 60068-3-4IEC 60068-2-78IEC 60068-2-47IEC 61000-4-2IEC 60068-2-6IEC 61000-4-3IEC 61000-4-29IEC 60512-14-7IEC 60068-2-18ISO 11631:1998ISO 9951:1993/COR 1:1994IEC 61000-6-2API MPMS 13.2:1996IEC 60068-2-1IEC 60529ISO 80000-4IEC 61000-6-1IEC 60068-3-1IEC 61000-4-1IEC 60068-2-2ISO/IEC Guide 98-3:2008IEC/TR 61000-2-1lSO 5167-1:2003IEC 61000-4-11All current amendments available at time of purchase are included with the purchase of this document.