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CEN
EN 12405-3:2015

EN 12405-3:2015

Current

Current

The latest, up-to-date edition.

Gas meters - Conversion devices - Part 3: Flow computer

Published date

02-12-2015

Publisher

Comite Europeen de Normalisation

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European foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions and symbols
4 Principle of measurement
5 Rated operating conditions
6 Construction requirements
7 Installation requirements
8 Performance
9 Tests of conformity
10 Marking
11 Installation and operating instructions
Annex A (normative) - Type test
Annex B (normative) - Pressure transducers
Annex C (normative) - Temperature transducers
Annex D (normative) - Requirements and testing
        of meter error correction
Annex E (informative) - Range of application of meter
        error correction with functions: e(Q) or e (Re)
Bibliography

Part 3 of this European Standard specifies the requirements and tests for the construction, performance, safety and conformity of flow computers (FCs) used to meet the metrological and technical requirements of a high accuracy volume conversion device.They are used to determine volume of fuel gases, including those of the first and second families according to EN 437.For the purpose of this European Standard, only flow computers that are intended to operate with ultrasonic meters according to ISO 17089 1 or gas turbine meters conforming to EN 12261 are considered.For the purpose of this European Standard only classification classes E2 and M1 are considered for the flow computer calculator.FCs are equipped with external separate transducers for pressure and temperature which may be approved separately.The provisions concerning pressure and temperature transducers are given in Annex B and C.Requirements and tests are given for energy calculator in EN 12405 2.

Committee
CEN/TC 237
DevelopmentNote
Supersedes PREN 12405-3. (12/2015)
DocumentType
Standard
PublisherName
Comite Europeen de Normalisation
Status
Current
Supersedes

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EN 50160 : 2010 AMD 1 2015 VOLTAGE CHARACTERISTICS OF ELECTRICITY SUPPLIED BY PUBLIC ELECTRICITY NETWORKS
EN 60068-3-1:2011 Environmental testing - Part 3-1: Supporting documentation and guidance - Cold and dry heat tests
EN 12405-1:2005+A2:2010 Gas meters - Conversion devices - Part 1: Volume conversion
EN ISO 13443:2005 Natural gas - Standard reference conditions (ISO 13443:1996 including Corrigendum 1:1997)
EN 61000-4-1:2007 Electromagnetic compatibility (EMC) - Part 4-1: Testing and measurement techniques - Overview of IEC 61000-4 series
ISO 6976:2016 Natural gas — Calculation of calorific values, density, relative density and Wobbe indices from composition
OIML D 11 : 2013 GENERAL REQUIREMENTS FOR MEASURING INSTRUMENTS - ENVIRONMENTAL CONDITIONS
IEC 61000-4-1:2006 Electromagnetic compatibility (EMC) - Part 4-1: Testing and measurement techniques - Overview of IEC 61000-4 series
ISO 5168:2005 Measurement of fluid flow — Procedures for the evaluation of uncertainties
EN 61000-4-11:2004/A1:2017 ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 4-11: TESTING AND MEASUREMENT TECHNIQUES - VOLTAGE DIPS, SHORT INTERRUPTIONS AND VOLTAGE VARIATIONS IMMUNITY TESTS (IEC 61000-4-11:2004/A1:2017)
EN 60068-2-1:2007 Environmental testing - Part 2-1: Tests - Test A: Cold
EN 60079-0:2012/A11:2013 EXPLOSIVE ATMOSPHERES - PART 0: EQUIPMENT - GENERAL REQUIREMENTS (IEC 60079-0:2011, MODIFIED)
IEC 60068-3-1:2011 Environmental testing - Part 3-1: Supporting documentation and guidance - Cold and dry heat tests
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IEC 62054-21:2004+AMD1:2017 CSV Electricity metering (AC) - Tariff and load control - Part 21: Particular requirements for time switches
EN 24006:1993 Measurement of fluid flow in closed conduits - Vocabulary and symbols (ISO 4006:1991)
EN 60950-1:2006/A2:2013 INFORMATION TECHNOLOGY EQUIPMENT - SAFETY - PART 1: GENERAL REQUIREMENTS (IEC 60950-1:2005/A2:2013, MODIFIED)
EN 60068-2-64:2008 ENVIRONMENTAL TESTING - PART 2-64: TESTS - TEST FH: VIBRATION, BROADBAND RANDOM AND GUIDANCE
IEC 61000-4-8:2009 Electromagnetic compatibility (EMC) - Part 4-8: Testing and measurement techniques - Power frequency magnetic field immunity test
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IEC 61000-4-4:2012 RLV Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement techniques - Electrical fast transient/burst immunity test
EN 61000-4-2:2009 Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement techniques - Electrostatic discharge immunity test
ISO/IEC/IEEE 60559:2011 Information technology — Microprocessor Systems — Floating-Point arithmetic
IEC 60068-2-31:2008 Environmental testing - Part 2-31: Tests - Test Ec: Rough handling shocks, primarily for equipment-type specimens
IEC 60068-2-64:2008 Environmental testing - Part 2-64: Tests - Test Fh: Vibration, broadband random and guidance
IEC 61000-4-6:2013 Electromagnetic compatibility (EMC) - Part 4-6: Testing and measurement techniques - Immunity to conducted disturbances, induced by radio-frequency fields
IEC 61520:2000 Metal thermowells for thermometer sensors - Functional dimensions
EN 61000-4-3 : 2006 AMD 2 2010 ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 4-3: TESTING AND MEASUREMENT TECHNIQUES - RADIATED, RADIO-FREQUENCY, ELECTROMAGNETIC FIELD IMMUNITY TEST
ISO/IEC Guide 99:2007 International vocabulary of metrology Basic and general concepts and associated terms (VIM)
EN 60079-11:2012 Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"
IEC 60079-11:2011 Explosive atmospheres - Part 11: Equipment protection by intrinsic safety "i"
ISO 7498-2:1989 Information processing systems Open Systems Interconnection Basic Reference Model Part 2: Security Architecture
ISO 15970:2008 Natural gas Measurement of properties Volumetric properties: density, pressure, temperature and compression factor
EN 60947-5-6:2000 Low-voltage switchgear and controlgear - Part 5-6: Control circuit devices and switching elements - DC interface for proximity sensors and switching amplifiers (NAMUR)
EN 437:2003+A1:2009 Test gases - Test pressures - Appliance categories
EN 60751:2008 INDUSTRIAL PLATINUM RESISTANCE THERMOMETERS AND PLATINUM TEMPERATURE SENSORS
EN 60079-25:2010/AC:2013 EXPLOSIVE ATMOSPHERES - PART 25: INTRINSICALLY SAFE ELECTRICAL SYSTEMS (IEC 60079-25:2010)
IEC 60529:1989+AMD1:1999+AMD2:2013 CSV Degrees of protection provided by enclosures (IP Code)
EN 61000-4-8:2010 Electromagnetic compatibility (EMC) - Part 4-8: Testing and measurement techniques - Power frequency magnetic field immunity test
ISO 13443:1996 Natural gas Standard reference conditions
EN 22768-1:1993 General tolerances - Part 1: Tolerances for linear and angular dimensions without individual tolerance indications (ISO 2768-1:1989)
EN ISO 12213-3:2009 Natural gas - Calculation of compression factor - Part 3: Calculation using physical properties (ISO 12213-3:2006)
IEC 60068-2-2:2007 Environmental testing - Part 2-2: Tests - Test B: Dry heat
IEC 61000-4-2:2008 Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement techniques - Electrostatic discharge immunity test
IEC 61000-4-3:2006+AMD1:2007+AMD2:2010 CSV Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test
IEC 60079-25:2010 Explosive atmospheres - Part 25: Intrinsically safe electrical systems
IEC 60079-0:2011 Explosive atmospheres - Part 0: Equipment - General requirements
IEC 62262:2002 Degrees of protection provided by enclosures for electrical equipment against external mechanical impacts (IK code)
IEC 60751:2008 Industrial platinum resistance thermometers and platinum temperature sensors
EN 60068-2-78:2013 Environmental testing - Part 2-78: Tests - Test Cab: Damp heat, steady state
EN 61000-4-4:2012 ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 4-4: TESTING AND MEASUREMENT TECHNIQUES - ELECTRICAL FAST TRANSIENT/BURST IMMUNITY TEST (IEC 61000-4-4:2012)
CISPR 11:2015 RLV Industrial, scientific and medical equipment - Radio-frequency disturbance characteristics - Limits and methods of measurement
IEC 60068-2-1:2007 Environmental testing - Part 2-1: Tests - Test A: Cold
ISO 17089-1:2010 Measurement of fluid flow in closed conduits - Ultrasonic meters for gas Part 1: Meters for custody transfer and allocation measurement
EN 61000-4-6:2014/AC:2015 ELECTROMAGNETIC COMPATIBILITY (EMC) - PART 4-6: TESTING AND MEASUREMENT TECHNIQUES - IMMUNITY TO CONDUCTED DISTURBANCES, INDUCED BY RADIO-FREQUENCY FIELDS (IEC 61000-4-6:2013)
EN 60529:1991/AC:2016-12 DEGREES OF PROTECTION PROVIDED BY ENCLOSURES (IP CODE) (IEC 60529 EDITION 2.2 CORRIGENDUM 2:2015)
EN 60068-2-30:2005 Environmental testing - Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle)
EN ISO 6976:2016 Natural gas - Calculation of calorific values, density, relative density and Wobbe indices from composition (ISO 6976:2016)
EN ISO 12213-2:2009 Natural gas - Calculation of compression factor - Part 2: Calculation using molar-composition analysis (ISO 12213-2:2006)
ISO 12213-2:2006 Natural gas Calculation of compression factor Part 2: Calculation using molar-composition analysis
IEC 61000-4-29:2000 Electromagnetic compatibility (EMC) - Part 4-29: Testing and measurement techniques - Voltage dips, short interruptions and voltage variations on d.c. input power port immunity tests
EN 12405-2:2012 Gas meters - Conversion devices - Part 2: Energy conversion
ISO 4006:1991 Measurement of fluid flow in closed conduits — Vocabulary and symbols
EN 61000-4-29:2000 Electromagnetic compatibility (EMC) - Part 4-29: Testing and measurement techniques - Voltage dips, short interruptions and voltage variations on d.c. input power port immunity tests
IEC 60947-5-6:1999 Low-voltage switchgear and controlgear - Part 5-6: Control circuit devices and switching elements - DC interface for proximity sensors and switching amplifiers (NAMUR)
EN ISO 15970:2014 Natural gas - Measurement of properties - Volumetric properties: density, pressure, temperature and compression factor (ISO 15970:2008)
ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
EN 1776:2015 Gas infrastructure - Gas measuring systems - Functional requirements
EN 60068-2-31:2008 ENVIRONMENTAL TESTING - PART 2-31: TESTS - TEST EC: ROUGH HANDLING SHOCKS, PRIMARILY FOR EQUIPMENT-TYPE SPECIMENS
IEC 60068-2-30:2005 Environmental testing - Part 2-30: Tests - Test Db: Damp heat, cyclic (12 h + 12 h cycle)

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