标准摘要
[中文适用范围]： 本文件适用于测量封闭管道中充满的导电液体的流量的工业电磁流量计。 它涵盖了利用交流电 (AC) 和脉冲直流 (DC) 电路来驱动由主电源运行的励磁线圈和仪表以及由电池或其他电源运行的流量计类型。 本文件不适用于设计用于在明渠或部分充满的管道中工作的插入式流量计或电磁流量计，也不适用于磁导浆料或液态金属应用的测量。 本文件没有规定与流量计危险环境使用相关的安全要求。 [外文原描述]： ISO 20456:2017 applies to industrial electromagnetic flowmeters used for the measurement of flowrate of a conductive liquid in a closed conduit running full. It covers flowmeter types utilizing both alternating current (AC) and pulsed direct current (DC) circuits to drive the field coils and meters running from a mains power supply and those operating from batteries or other sources of power. ISO 20456:2017 is not applicable to insertion-type flowmeters or electromagnetic flowmeters designed to work in open channels or pipes running partially full, nor does it apply to the measurement of magnetically permeable slurries or liquid metal applications. ISO 20456:2017 does not specify safety requirements in relation to hazardous environmental usage of the flowmeter.
英文名称Measurement of fluid flow in closed conduits — Guidance for the use of electromagnetic flowmeters for conductive liquids