标准摘要
[中文适用范围]： 本国际标准规定了超声波液体流量计的要求和建议，这种流量计利用超声波信号的传播时间来测量单相均质液体的流量。 流量计的最小或最大尺寸没有限制。 本国际标准规定了用于液体流量测量的超声波流量计（USM）的性能、校准和输出特性，并涉及安装条件。 它涵盖了带或不带专用检验（校准）系统的安装。 它涵盖了在线和夹式传感器（用于光束非折射和折射的配置）。 其中包括带有仪表主体的仪表和带有现场安装传感器的仪表。 [外文原描述]： ISO 12242:2012 specifies requirements and recommendations for ultrasonic liquid flowmeters, which utilize the transit time of ultrasonic signals to measure the flow of single-phase homogenous liquids in closed conduits. There are no limits on the minimum or maximum sizes of the meter. ISO 12242:2012 specifies performance, calibration and output characteristics of ultrasonic meters (USMs) for liquid flow measurement and deals with installation conditions. It covers installation with and without a dedicated proving (calibration) system. It covers both in-line and clamp-on transducers (used in configurations in which the beam is non-refracted and in those in which it is refracted). Included are both meters incorporating meter bodies and meters with field-mounted transducers.
英文名称Measurement of fluid flow in closed conduits — Ultrasonic transit-time meters for liquid