ISO 20456:2017
Measurement of fluid flow in closed conduits - Guidance for the use of electromagnetic flowmeters for conductive liquids

Standard No.

ISO 20456:2017

Release Date

2017

Published By

International Organization for Standardization (ISO)

Latest

ISO 20456:2017

Scope

This document 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. This document 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. This document does not specify safety requirements in relation to hazardous environmental usage of the flowmeter.

ISO 20456:2017 Referenced Document

• IEC 60068-2-27:2008 Environmental testing - Part 2-27: Tests - Test Ea and guidance: Shock
• IEC 60068-2-67:1995 Environmental testing - Part 2: Tests - Test Cy: Damp heat, steady state, accelerated test primarily intended for components
• IEC 60068-2-6:2007 Environmental testing - Part 2-6: Tests - Test Fc: Vibration (sinusoidal)
• IEC 60068-2-78:2012 Environmental testing - Part 2-78: Tests - Test Cab: Damp heat, steady state
• IEC 60359:2001 Electrical and electronic measurement equipment - Expression of performance
• IEC 60381-1:1982 Analogue signals for process control systems. Part 1 : Direct current signals
• IEC 60381-2:1978 Analogue signals for process control systems. Part 2 : Direct voltage signals
• IEC 60529:1989 Degrees of protection provided by enclosures (IP code)
• ISO 4006:1991 Measurement of fluid flow in closed conduits; vocabulary and symbols
• ISO 4064-1:2014 Water meters for cold potable water and hot water - Part 1: Metrological and technical requirements
• ISO 4064-2:2014 Water meters for cold potable water and hot water - Part 2: Test methods
• ISO 4064-3:2014 Water meters for cold potable water and hot water - Part 3: Test report format
• ISO 4064-4:2014 Water meters for cold potable water and hot water - Part 4: Non-metrological requirements not covered in ISO 4064-1
• ISO 4064-5:2014 Water meters for cold potable water and hot water - Part 5: Installation requirements
• ISO 4185:1980 Measurement of liquid flow in closed conduits; Weighing method
• ISO 5168:2005 Measurement of fluid flow - Procedures for the evaluation of uncertainties
• ISO 6316:2012 Hot-rolled steel strip of structural quality
• ISO 7005-1:2011 Pipe flanges - Part 1: Steel flanges for industrial and general service piping systems
• ISO 7066-1:1989 Assessment of uncertainty in the calibration and use of flow measurement devices; part 1: linear calibration relationships
• ISO 7194:2008 Measurement of fluid flow in closed conduits - Velocity-area methods of flow measurement in swirling or asymmetric flow conditions in circular ducts by means of current-meters or Pitot static tubes
• ISO 8316:1987 Measurement of liquid flow in closed conduits; Method by collection of the liquid in a volumetric tank
• ISO/IEC GUIDE 98-1:2009 Uncertainty of measurement — Part 1: Introduction to the expression of uncertainty in measurement*， 2024-04-20 Update
• ISO/IEC GUIDE 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
• ISO/IEC GUIDE 99:2007 International vocabulary of metrology - Basic and general concepts and associated terms (VIM)

ISO 20456:2017 history

• 2017 ISO 20456:2017 Measurement of fluid flow in closed conduits - Guidance for the use of electromagnetic flowmeters for conductive liquids