EN ISO 4064-2:2017

SLOVENSKI STANDARD
01-september-2017
1DGRPHãþD
SIST EN ISO 4064-2:2014
9RGRPHUL]DPHUMHQMHKODGQHSLWQHYRGHLQYURþHYRGHGHO3UHVNXVQHPHWRGH
,62
Water meters for cold potable water and hot water - Part 2: Test methods (ISO 4064-
2:2014)
Wasserzähler zum Messen von kaltem Trinkwasser und heißem Wasser - Teil 2:
Prüfverfahren (ISO 4064-2:2014)
Compteurs d'eau potable froide et d'eau chaude - Partie 2: Méthodes d'essai (ISO 4064-
2:2014)
Ta slovenski standard je istoveten z: EN ISO 4064-2:2017
ICS:
17.120.10 Pretok v zaprtih vodih Flow in closed conduits
91.140.60 Sistemi za oskrbo z vodo Water supply systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 4064-2
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2017
EUROPÄISCHE NORM
ICS 91.140.60 Supersedes EN ISO 4064-2:2014
English Version
Water meters for cold potable water and hot water - Part
2: Test methods (ISO 4064-2:2014)
Compteurs d'eau potable froide et d'eau chaude - Wasserzähler zum Messen von kaltem Trinkwasser
Partie 2: Méthodes d'essai (ISO 4064-2:2014) und heißem Wasser - Teil 2: Prüfverfahren (ISO 4064-
2:2014)
This European Standard was approved by CEN on 11 May 2017.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4064-2:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
Annex ZA (informative) Relationship between this European Standard and the essential
requirements of Directive 2014/32/EU aimed to be covered . 4

European foreword
The text of ISO 4064-2:2014 has been prepared by Technical Committee ISO/TC 30 “Measurement of
fluid flow in closed conduits” of the International Organization for Standardization (ISO) and has been
taken over as EN ISO 4064-2:2017 by Technical Committee CEN/TC 92 “Water meters” the secretariat
of which is held by SNV.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by November 2017, and conflicting national standards
shall be withdrawn at the latest by November 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
This document supersedes EN ISO 4064-2:2014.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directives, see informative Annex ZA, which is an integral part of this
document.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 4064-2:2014 has been approved by CEN as EN ISO 4064-2:2017 without any
modification.
Annex ZA
(informative)
Relationship between this European Standard and the essential
requirements of Directive 2014/32/EU aimed to be covered
This European Standard has been prepared under a Commission’s standardization request Mandate to
CEN and CENELEC for standardisation in the field of measuring instruments “M/374 EN” to provide one
voluntary means of conforming to essential requirements of Directive 2014/32/EC EU of the European
Parliament and the Council of 26 February 2014 on measuring instruments (Text with EEA relevance).
Once this standard is cited in the Official Journal of the European Union under that Directive
2014/32/EU, compliance with the normative clauses of this standard given in Table ZA.1 confers,
within the limits of the scope of this standard, a presumption of conformity with the corresponding
essential requirements of that Directive 2014/32/EU, and associated EFTA regulations.
Introduction:
The column “Comment” the term "Addressed" indicates the compliance between EN ISO 4064-2:2014
and the relevant requirement in Directive 2014/32/EU. The term "Not (fully) addressed" indicates that
compliance may not (fully) be realised, whilst "Addressed" may also be qualified in other ways. In the
case the requirement is "Not fully addressed", a short statement may explain what is covered. The
indication “Not applicable” means that the requirement in Annex I of Directive 2014/32/EU is not
relevant for Water Meters
The original Directive 2004/22/EU had been amended by Directive 137/2009/EC. These have been
fully replaced by Directive 2014/32/EU. This latest directive has already been amended by Directive
2015/13/EU.
The numbering in the first column will reflects the structure of the new Directive 2014/32/EU.
For purpose of cross-reference the second column indicates the structure of the original Directive
2004/22/EU.
Table ZA.1 — Correspondence between this European Standard and Annex I of Directive
2014/32/EU.
Essential Requirements Essential Requirements Clause(s)/subclause( Qualifying
(ERs) of Directive (ERs) of Directive s) of this EN remarks/Notes
32/2014/EU 22/2004/EC
Annex I Essential Annex I Essential
Requirements Requirements
Note: Amended by Directive Note: Amended by Directive
2015/13/EU 2009/137
I.1.1 and 1.2 Allowable errors, 7.4 Reference conditions
I.1.1 and 1.2 Allowable errors,
Rated operating conditions
Rated operating conditions
I.1.3.1 Climatic environments, 8.2 Addressed
I.1.3.1 Climatic environments,
temperature limits
8.3
temperature limits
8.4
I.1.3.2 Mechanical 8.6 Addressed
I.1.3.2 Mechanical
environments
environments
8.7
I.1.3.3 Electromagnetic 8.5 Addressed
environments
8.8
8.9
8.10
I.1.3.3 Electromagnetic
environments
8.11
8.12
8.13
8.14
8.15
7.4.4 Addressed
I.1.3.4 Other influences I.1.3.4 Other influences 8.5.3
8.5.4
7.2.2 Addressed
7.4.2
I.1.4.1 Basic rules for testing I.1.4.1 Basic rules for testing 7.4.3
7.4.4
7.4.5
8.1
6.4 / 8.4 Addressed, damp
I.1.4.2 Ambient humidity I.1.4.2 Ambient humidity
heat cyclic only
I.2 Reproducibility I.2 Reproducibility EN ISO 4064-1, 7.2.9.3 Addressed
I.3 Repeatability 7.4.4 Addressed via
I.3 Repeatability
acceptance criteria
Covered by
of tests
performance tests
I.4 Discrimination and I.4 Discrimination and 6.4.3.6 Addressed via
sensitivity sensitivity acceptance criteria
Covered by
of tests
performance tests
I.5 Durability 7.11 Addressed via
I.5 Durability acceptance criteria
of tests
I.6 Reliability 7.11 Addressed via
I.6 Reliability acceptance criteria
of tests
I.7 Suitability
I.7.1 Fraudulent use 6.2 Addressed (sealing
I.7.1 Fraudulent use
is addressed in
6.4.4
4064-1, 6.8)
7.12
I.7.2 Suitable for use 6.4.3 Addressed
I.7.2 Suitable for use
I.7.3 Unduly biasing I.7.3 Unduly biasing 7.4 Addressed (test at
Q4 in 7.4)
8.17
I.7.4 Insensitivity to 8.17 Typically not
I.7.4 Insensitivity to
measurand fluctuations applicable however,
measurand fluctuations
absence of flow
addresses in of EN
ISO 4064-2, 8.17
I.7.5 Robustness and I.7.5 Robustness and Addressed by 7.11 and Also addressed in EN
suitability of materials suitability of materials other parts sections 7 ISO 4064-1, 6.1
and 8
I.7.6 Allow for control after 6.4.3.6.1 Also addressed in EN
I.7.6 Allow for control after
placing on the market. ISO 4064-1, 6.8
6.4.3.6.2
placing on the market
6.4.4
Annex A
I.8.1 Not to be influenced in I.8.1 Not to be influenced in Not addressed in EN Addressed in EN
any admissible way any admissible way ISO 4064-2 ISO 4064-1, 5.1.1
and 6.3
I.8.2 Securing of hardware I.8.2 Securing of hardware Not addressed in EN Addressed in EN
components components ISO 4064-2 ISO 4064-1, 6.8

I.8.3 Securing and I.8.3 Securing and Not addressed in EN Addressed in EN
identification of software identification of software ISO 4064-2 ISO 4064-1, 6.8
I.8.4 Measurement data I.8.4 Measurement data Not addressed in EN Addressed in EN
adequately protected against adequately protected against ISO 4064-2 ISO 4064, 1, 6.8
corruption corruption
I.8.5 Total quantity supplied I.8.5 Total quantity supplied Not addressed in EN Addressed in EN
not to be reset not to be reset ISO 4064-2 ISO 4064-1, 6.8
I.9.1 Inscriptions I.9.1 Inscriptions 6.4.2 Addressed
I.9.2 Marking of packaging and I.9.2 Marking of packaging and Not addressed in EN Addressed in EN
documents documents ISO 4064-2 ISO 4064-1, 6.6
I.9.3 Information on operation Not addressed in EN Addressed EN
I.9.3 Information on operation
ISO 4064-2 ISO 4064-5, 4.2
I.9.4 Necessity of instruction I.9.4 Necessity of instruction Not addressed in EN Addressed EN
manual manual ISO 4064-2 ISO 4064-5, 4.2
I.9.5 Scale interval for the I.9.5 Scale interval for the 6.4.3.6.2.1 Addressed
measurand measurand
I.9.6 Material measure I.9.6 Unit of measurement 6.4.3.2 Addressed
Not addressed in EN Addressed in EN
I.9.7 Unit of measurement I.9.7 Unit of measurement
ISO 4064-2 ISO 4064-1, 6.7.1.2
I.9.8 Marking properties I.9.8 Marking properties 6.4.2 Addressed
I.10.1 Display or hard copy I.10.1 Display or hard copy 6.4.3 Addressed
I.10.2 Reading properties I.10.2 Reading properties 6.4.3.1 Addressed
I.10.3 Hard-copy or print I.10.3 Hard-copy or print - Not applicable
properties properties
I.10.4 Direct sales trading I.10.4 Direct sales trading - Not applicable
transactions transactions
I.10.5 Properties of display for I.10.5 Properties of display for 6.4.3 Addressed
remote reading remote reading
I.11.1 Recording properties of I.11.1 Recording properties of - Not applicable
non-utility measuring non-utility measuring
instrument instrument
I.11.2 Availability of durable I.11.2 Availability of durable - Not applicable
proof of measurement result proof of measurement result
I.12 Conformity evaluation 10 Addressed also in EN
I.12 Conformity evaluation ISO 4064-1, 3.6 and
7.3
Specific Requirements of Specific Requirements of Clause(s)/subclause( Qualifying
Annex III for WATER Annex MI-001 for WATER s) of this European remarks/Notes
METERS (MI-001) METERS Standard
Rated Operating Conditions 4 Reference conditions
Rated Operating Conditions
only
MI.1 Values of flow rate range MI.1 Values of flow rate range 7.4 Addressed
Note: addresses amendment of Note: addresses amendment of
Directive 2015/13/EU Directive 2015/13/EU
MI.2 Temperature range of the 7.5 Addressed
MI.2 Temperature range of the
water
water
7.6
MI.3 Relative pressure of the 7.3 Addressed
MI.3 Relative pressure of the
water water 7.7
MI.4 Nominal value of AC MI.4 Nominal value of AC Not addressed in EN But addressen in EN
voltage supply and limits of DC voltage supply and limits of DC ISO 4064-2 ISO 4064-5, 4.1
supply supply
MI.5 MPE ± 2 % for water MI.5 MPE ± 2 % for water 7.4.5 Addressed
temperature ≤ 30 °C for flow temperature ≤ 30 °C for flow
rate between Q2 (included) rate between Q2 (included)
and Q4 and Q4
MI.5 MPE ±3% for water MI.5 MPE ±3% for water 7.4.5 Addressed
temperature > 30 °C for flow temperature > 30 °C for flow
rate between Q2 (included) rate between Q2 (included)
and Q4 and Q4
MI.6 MPE ± 5 % for any water MI.6 MPE ± 5 % for any water 7.4.5 Addressed
temperature for flow rate temperature for flow rate
between Q1 and Q2 (excluded) between Q1 and Q2 (excluded)
(see: Directive 137/2009/EC
MI.6 Non exploitation of MPE
Requirements below)
MI.7.1.1 Electromagnetic 8.1.3 Addressed
MI.7.1.1 Electromagnetic
immunity
immunity
8.12
8.13
MI.7.1.2 Condition after 8.1.3 Addressed
MI.7.1.2 Condition after
electromagnetic disturbance
electromagnetic disturbance
8.12
8.13
MI 7.1.3 Critical change value 8.1.3 Addressed
MI 7.1.3 Critical change value
8.12
8.13
MI 7.2.1 Variation of MI 7.2.1 Variation of 7.11 Addressed
measurement after durability measurement after durability
MI 7.2.2 Error of indication MI 7.2.2 Error of indication 7.11 Addressed
after durability after durability
MI.8.1 Meter able to be MI.8.1 Meter able to be 7.4 Addressed
installed in defined position installed in defined position
MI.8.2 Meter is not designed to MI.8.2 Meter is not designed to 7.8 Addressed
measure reverse flow measure reverse flow
MI.9 Cubic metre MI.9 Cubic metre 6.4.3.2 Addressed
MI 10 Putting into use MI 10 Putting into use Not addressed in EN Addressed in EN
ISO 4064-2 ISO 4064-5, 6.2.6
and 8.3.2 and I.7
Directive 137/2009/EC Clause(s)/subclause(s Qualifying
Requirements ) of this European remarks/Notes
Standard
MI 001 6a Exploitation of MPE 7.4.5b) " non-exploitation of
the maximum
permissible errors",
not addressed
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
Standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
INTERNATIONAL ISO
STANDARD 4064-2
Fourth edition
2014-06-01
Water meters for cold potable water
and hot water —
Part 2:
Test methods
Compteurs d’eau potable froide et chaude —
Partie 2: Méthodes d’essai
Reference number
ISO 4064-2:2014(E)
©
ISO 2014
ISO 4064-2:2014(E)
© ISO 2014
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
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Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail copyright@iso.org
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved

ISO 4064-2:2014(E)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Reference conditions . 2
5 Symbols, units and equations . 3
6 External examination . 3
6.1 General . 3
6.2 Object of the examination . 3
6.3 Preparation . 3
6.4 Examination procedures . 4
7 Performance tests for all water meters . 8
7.1 General . 8
7.2 Required conditions for all tests . 8
7.3 Static pressure test (ISO 4064-1:2014|OIML R 49-1:2013, 4.2.10) . 9
7.4 Determination of intrinsic errors (of indication) (ISO 4064-1:2014|OIML R 49-1:2013,
7.2.3) .10
7.5 Water temperature test (ISO 4064-1:2014|OIML R 49-1:2013, 4.2.8) .18
7.6 Overload water temperature test (ISO 4064-1:2014|OIML R 49-1:2013, 7.2.5) .18
7.7 Water pressure test (ISO 4064-1:2014|OIML R 49-1:2013, 4.2.8) .19
7.8 Reverse flow test (ISO 4064-1:2014|OIML R 49-1:2013, 4.2.7) .19
7.9 Pressure loss test (ISO 4064-1:2014|OIML R 49-1:2013, 6.5) .21
7.10 Flow disturbance tests (ISO 4064-1:2014|OIML R 49-1:2013, 6.3.4) .25
7.11 Durability tests (ISO 4064-1:2014|OIML R 49-1:2013, 7.2.6) .26
7.12 Magnetic field testing .31
7.13 Tests on ancillary devices of a water meter .31
7.14 Environmental testing .32
8 Performance tests related to influence factors and disturbances .32
8.1 General requirements (ISO 4064-1:2014|OIML R 49-1:2013, A.1) .32
8.2 Dry heat (non-condensing) (ISO 4064-1:2014|OIML R 49-1:2013, A.5) .36
8.3 Cold (ISO 4064-1:2014|OIML R 49-1:2013, A.5).37
8.4 Damp heat, cyclic (condensing) (ISO 4064-1:2014|OIML R 49-1:2013, A.5) .38
8.5 Power supply variation (ISO 4064-1:2014|OIML R 49-1:2013, A.5) .39
8.6 Vibration (random) (ISO 4064-1:2014|OIML R 49-1:2013, A.5) .42
8.7 Mechanical shock (ISO 4064-1:2014|OIML R 49-1:2013, A.5) .43
8.8 AC mains voltage dips, short interruptions and voltage variations (ISO 4064-
1:2014|OIML R 49-1:2013, A.5) .44
8.9 Bursts on signal lines (ISO 4064-1:2014|OIML R 49-1:2013, A.5) .45
8.10 Bursts (transients) on AC and DC mains (ISO 4064-1:2014|OIML R 49-1:2013, A.5) .47
8.11 Electrostatic discharge (ISO 4064-1:2014|OIML R 49-1:2013, A.5) .48
8.12 Radiated electromagnetic fields (ISO 4064-1:2014|OIML R 49-1:2013, A.5) .49
8.13 Conducted electromagnetic fields (ISO 4064-1:2014|OIML R 49-1:2013, A.5) .51
8.14 Surges on signal, data and control lines (ISO 4064-1:2014|OIML R 49-1:2013, A.5) .53
8.15 Surges on AC and DC mains power lines (ISO 4064-1:2014|OIML R 49-1:2013, A.5) . .54
8.16 Static magnetic field (ISO 4064-1:2014|OIML R 49-1:2013, 7.2.8) .55
8.17 Absence of flow test .56
9 Test program for type evaluation .57
9.1 Number of samples required .57
9.2 Performance test applicable to all water meters .57
9.3 Performance tests applicable to electronic water meters, mechanical water meters fitted
with electronic devices, and their separable parts .58
ISO 4064-2:2014(E)
9.4 Type evaluation of separable parts of a water meter .58
9.5 Families of water meters .59
10 Tests for initial verification .59
10.1 Initial verification of complete and combined water meters .59
10.2 Initial verification of separable parts of a water meter .60
11 Presentation of results .61
11.1 Object of the reports .61
11.2 Identification and test data to be included in records .61
Annex A (normative) Type examination and testing of checking facilities of electronic devices .63
Annex B (normative) Calculating the relative error (of indication) of a water meter .69
Annex C (normative) Installation requirements for flow disturbance tests .75
Annex D (normative) Type evaluation of a family of water meters .77
Annex E (informative) Examples of methods and components used for testing concentric
water meters .79
Annex F (informative) Determining the density of water .82
Annex G (informative) Maximum uncertainties in the measurement of influence factors
and disturbances .84
Annex H (informative) Pressure loss test pressure tappings, hole and slot details .87
Annex I (normative) Flow disturbers .90
Bibliography .101
iv © ISO 2014 – All rights reserved

ISO 4064-2:2014(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2, www.iso.org/directives.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received, www.iso.org/patents.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
The committees responsible for this document are Technical Committee ISO/TC 30, Measurement of fluid
flow in closed conduits, Subcommittee SC 7, Volume methods including water meters and OIML Technical
Subcommittee TC 8/SC 5 Water meters.
This fourth edition of ISO 4064-2 cancels and replaces the third edition (ISO 4064-2:2005), which has
been technically revised. Provisions of the third edition are addressed in ISO 4064-5:2014.
ISO 4064 consists of the following parts, under the general title Water meters for cold potable water and
hot water:
— Part 1: Metrological and technical requirements
— Part 2: Test methods
— Part 3: Test report format
— Part 4: Non-metrological requirements not covered in ISO 4064-1
— Part 5: Installation requirements
This edition of ISO 4064-2 is identical with the corresponding edition of OIML R 49-2, which has been
issued concurrently. OIML R 49-2 was approved for final publication by the International Committee of
Legal Metrology at its 48th meeting in Ho Chi Minh City, Vietnam in October 2013 and will be submitted
to the International Conference on Legal Metrology in 2016 for formal sanction.
INTERNATIONAL STANDARD ISO 4064-2:2014(E)
Water meters for cold potable water and hot water —
Part 2:
Test methods
1 Scope
This part of ISO 4064|OIML R 49 is applicable to the type evaluation and initial verification testing of
water meters for cold potable water and hot water as defined in ISO 4064-1:2014|OIML R 49-1:2013.
OIML Certificates of Conformity can be issued for water meters under the scope of the OIML Certificate
System, provided that this part of ISO 4064|OIML R 49, ISO 4064-1:2014|OIML R 49-1:2013 and
ISO 4064-3:2014|OIML R 49-3:2013 are used in accordance with the rules of the System.
This part of ISO 4064|OIML R 49 sets out details of the test programme, principles, equipment and
procedures to be used for the type evaluation, and initial verification of a meter type.
The provisions of this part of ISO 4064|OIML R 49 also apply to ancillary devices, if required by national
regulations.
The provisions include requirements for testing the complete water meter and for testing the
measurement transducer (including the flow or volume sensor) and the calculator (including the
indicating device) of a water meter as separate units.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 4064-1:2014|OIML R 49-1:2013, Water meters for cold potable water and hot water — Part 1:
Metrological and technical requirements
ISO 4064-3:2014|OIML R 49-3:2013, Water meters for cold potable water and hot water — Part 3: Test
report format
ISO/IEC Guide 98-3:2008, Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in
measurement (GUM:1995)
IEC 60068-2-1, Environmental testing — Part 2-1: Tests — Test A: Cold
IEC 60068-2-2, Environmental testing — Part 2-2: Tests — Test B: Dry heat
IEC 60068-2-30, Environmental testing — Part 2-30: Tests — Test Db: Damp heat, cyclic (12 h + 12 h cycle)
IEC 60068-2-31, Environmental testing — Part 2-31: Tests — Test Ec: Rough handling shocks, primarily for
equipment-type specimens
IEC 60068-2-47, Environmental testing — Part 2-47: Tests — Mounting of specimens for vibration, impact
and similar dynamic tests
IEC 60068-2-64, Environmental testing — Part 2-64: Tests — Test Fh: Vibration, broadband random and
guidance
IEC 60068-3-4, Environmental testing — Part 3-4: Supporting documentation and guidance — Damp heat
tests
ISO 4064-2:2014(E)
IEC 60654-2, Operating conditions for industrial process measurement and control equipment — Part 2:
Power
IEC 61000-2-1, Electromagnetic compatibility (EMC) — Part 2: Environment — Section 1: Description of
the environment — Electromagnetic environment for low-frequency conducted disturbances and signaling
in public power supply systems
IEC 61000-2-2, Electromagnetic compatibility (EMC) — Part 2-2: Environment — Compatibility levels for
low-frequency conducted disturbances and signaling in public low-voltage power supply systems
IEC 61000-4-1, Electromagnetic compatibility (EMC) — Part 4-1: Testing and measurement techniques —
Overview of IEC 61000-4 series
IEC 61000-4-2, Electromagnetic compatibility (EMC) — Part 4-2: Testing and measurement techniques —
Electrostatic discharge immunity test
IEC 61000-4-3, Electromagnetic compatibility (EMC) — Part 4-3: Testing and measurement techniques —
Radiated, radio frequency, electromagnetic field immunity test
IEC 61000-4-4, Electromagnetic compatibility (EMC) — Part 4-4: Testing and measurement techniques —
Electrical fast transient/burst immunity test
IEC 61000-4-5, Electromagnetic compatibility (EMC) — Part 4-5: Testing and measurement techniques —
Surge immunity test
IEC 61000-4-6, Electromagnetic compatibility (EMC) — Part 4-6: Testing and measurement techniques —
Immunity to conducted disturbances, induced by radio-frequency fields
IEC 61000-4-11, Electromagnetic compatibility (EMC) — Part 4-11: Testing and measurement techniques —
Voltage dips, short interruptions and voltage variations immunity tests
IEC 61000-6-1, Electromagnetic compatibility (EMC) — Part 6-1: Generic standards — Immunity for
residential, commercial and light-industrial environments
IEC 61000-6-2, Electromagnetic compatibility (EMC) — Part 6-2: Generic standards — Immunity for
industrial environments
OIML D 11:2004, General requirements for electronic measuring instruments
OIML G 13, Planning of metrology and testing laboratories
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 4064-1:2014|OIML R 49-
1:2013 apply.
4 Reference conditions
All applicable influence quantities, except for the influence quantity being tested, shall be held at the
following values during type evaluation tests on a water meter. However, for influence factors and
2 © ISO 2014 – All rights reserved

ISO 4064-2:2014(E)
disturbances for electronic water meters, it is permissible to use the reference conditions defined in the
applicable IEC standard:
Flow rate: 0,7 × (Q + Q ) ± 0,03 × (Q + Q )
2 3 2 3
Water temperature: T30, T50 is 20 °C ± 5 °C
T70 to T180 is 20 °C ± 5 °C and 50 °C ± 5 °C
T30/70 to T30/180 is 50 °C ± 5 °C
Water pressure: Within rated operating conditions
(see ISO 4064-1:2014|OIML R 49-1:2013, 6.4)
Ambient temperature range: 15 °C to 25 °C
Ambient relative humidity range: 45 % to 75 %
Ambient atmospheric pressure range: 86 kPa to 106 kPa [0,86 bar to 1,06 bar]
Power supply voltage (mains AC): Nominal voltage, U ± 5 %
nom
Power supply frequency: Nominal frequency, f ± 2 %
nom
Power supply voltage (battery): A voltage V in the range U ≤ V ≤ U
bmin bmax
During each test, the temperature and relative humidity shall not vary by more than 5 °C or 10 %,
respectively, within the reference range. The reference conditions are permitted to deviate from the
defined tolerance values during the performance tests if evidence can be given to the body responsible
for type approval that the type of meter under consideration is not affected by the deviation of the
condition in question. The actual values of the deviating condition, however, shall be measured and
documented as part of the performance test documentation.
5 Symbols, units and equations
Equations, symbols and their units, concerning the calculation of the error (of indication) of a water
meter used in this part of ISO 4064|OIML R 49, are given in Annex B.
6 External examination
6.1 General
During the external examination, all relevant values, dimensions, and observations shall be recorded.
NOTE 1 For presentation of the results of type examinations, see Clause 11.
NOTE 2 The relevant subclauses of ISO 4064-1:2014|OIML R 49-1:2013 are shown in parentheses in the
following.
6.2 Object of the examination
To verify that a water meter meets the requirements of ISO 4064-1:2014|OIML R 49-1:2013 with respect
to the design of the indicating device, the marking of the meter and the application of protection devices.
6.3 Preparation
Linear measurements that have to be taken of a meter shall be made using traceable, calibrated
measuring devices.
ISO 4064-2:2014(E)
The actual or apparent dimensions of the scales of the indicating device shall be taken without removing
the meter lens or disassembling the meter.
NOTE A travelling microscope (cathetometer) can be used to measure the width, spacing and height of the
scale divisions and the height of the numerals.
6.4 Examination procedures
6.4.1 General
The following aspects of a meter design shall be examined on at least one meter from the sample.
Either the same meter sample may be used for all the external examinations or different meters from
the samples submitted may be used for some of the examinations.
6.4.2 Marks and inscriptions (ISO 4064-1:2014|OIML R 49-1:2013, 6.6)
a) Verify that a place is provided for affixing the verification mark which is visible without dismantling
the water meter.
b) Verify that the water meter is clearly and indelibly marked with the information presented in
ISO 4064-1:2014|OIML R 49-1:2013, 6.6.2.
c) Complete the section reference ISO 4064-1:2014|OIML R 49-1:2013, 6.6.1 and 6.6.2 (r) in
ISO 4064-3:2014|OIML R 49-3:2013, 4.4.1.
6.4.3 Indicating device (ISO 4064-1:2014|OIML R 49-1:2013, 6.7)
6.4.3.1 Function (ISO 4064-1:2014|OIML R 49-1:2013, 6.7.1.1)
a) Verify that the indicating device provides an easily read, reliable and unambiguous visual indication
of the indicated volume.
b) Verify that the indicating device includes visual means for testing and calibration.
c) If the indicating device includes additional elements for testing and calibration by other methods,
e.g. for automatic testing and calibration, record the type(s) of device.
d) If the meter is a combination meter with two indicating devices, 6.4.3 applies to both indicating
devices.
e) Complete the section reference ISO 4064-1:2014|OIML R 49-1:2013, 6.7.1.1 in
ISO 4064-3:2014|OIML R 49-3:2013, 4.4.1.
6.4.3.2 Unit of measurement, symbol, and its placement (ISO 4064-1:2014|OIML R 49-1:2013,
6.7.1.2)
a) Verify that the indicated volume of water is expressed in cubic metres.
b) Verify that the symbol m appears on the dial or immediately adjacent to the numbered display.
c) Complete the section reference ISO 4064-1:2014|OIML R 49-1:2013, 6.7.1.2 in
ISO 4064-3:2014|OIML R 49-3:2013, 4.4.1.
6.4.3.3 Indicating range (ISO 4064-1:2014|OIML R 49-1:2013, 6.7.1.3)
a) Verify that the indicating device is able to record the indicated volume in cubic metres given in
ISO 4064-1:2014|OIML R 49-1:2013, Table 5 corresponding to the permanent flow rate Q without
passing through zero.
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ISO 4064-2:2014(E)
b) Complete the section reference ISO 4064-1:2014|OIML R 49-1:2013, 6.7.1.3, in
ISO 4064-3:2014|OIML R 49-3:2013, 4.4.1.
6.4.3.4 Colour coding for indicating devices (ISO 4064-1:2014|OIML R 49-1:2013, 6.7.1.4)
a) Verify that either:
1) the colour black is used to indicate the cubic metre and its multiples; and
2) the colour red is used to indicate sub-multiples of a cubic metre; and
3) the colours are applied either to the pointers, indexes, numbers, wheels discs, dials or aperture
frames;
or other means of indicating the cubic metre are used in which there is no ambiguity in
distinguishing between the primary indication and alternative displays, e.g. sub-multiples for
verification and testing.
b) Complete the section reference ISO 4064-1:2014|OIML R 49-1:2013, 6.7.1.4, in
ISO 4064-3:2014|OIML R 49-3:2013, 4.4.1.
6.4.3.5 Types of indicating device (ISO 4064-1:2014|OIML R 49-1:2013, 6.7.2)
6.4.3.5.1 Type 1 — Analogue device (ISO 4064-1:2014|OIML R 49-1:2013, 6.7.2.1)
a) If a type 1 indicating device has been used, verify that volume is indicated by:
— either continuous movement of one or more pointers moving relative to graduated scales;
— or continuous movement of one or more circular scales or drums, each passing an index.
n
b) Verify that the value expressed in cubic metres for each scale division is of the form 10 , where n is a
positive or a negative whole number or zero, thereby establishing a system of consecutive decades.
c) Verify that each scale is either graduated in values expressed in cubic metres or accompanied by a
multiplication factor (×0,001; ×0,01; ×1; ×10; ×100; ×1 000, etc.).
d) Verify that the rotational movements of the pointers or circular scales are clockwise.
e) Verify that the linear movement of the pointers or scales is from left to right.
f) Verify that the movement of the numbered roller indicators is upwards.
g) Complete the section reference ISO 4064-1:2014|OIML R 49-1:2013, 6.7.2.1, in
ISO 4064-3:2014|OIML R 49-3:2013, 4.4.1.
6.4.3.5.2 Type 2 — Digital device (ISO 4064-1:2014|OIML R 49-1:2013, 6.7.2.2)
a) Verify that the indicated volume is given by a line of digits, appearing in one or more apertures.
b) Verify that the advance of one digit is completed while the digit of the next immediately lower decade
changes from 9 to 0.
c) Verify that the actual or apparent height of the digits is at least 4 mm.
d) For non-electronic devices:
1) verify that the movement of the numbered roller indicators (drums) is upwards;
ISO 4064-2:2014(E)
2) if the lowest value decade has a continuous movement, verify that the aperture is large enough
to permit a digit to be read without ambiguity.
For electronic devices:
3) verify that for non-permanent displays the volume can be displayed at any time for at least 10 s;
4) check the entire display visually in the following sequence:
i) for seven segment type verify that all the elements can be correctly displaye
...