SIST EN ISO 4064-2:2017

Water meters for cold potable water and hot water - Part 2: Test methods (ISO 4064-2:2014)

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.

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)

L'ISO 4064-2:2014|OIML R 49-2:2013 est applicable aux essais d'évaluation de type et de vérification primitive des compteurs d'eau potable froide et d'eau chaude tels que définis dans l'ISO 4064‑1:2014|OIML R 49-1. Des certificats de conformité OIML peuvent être délivrés pour les compteurs d'eau couverts par le domaine d'application du système de certificats OIML, à condition que l'ISO 4064‑1:2014|OIML R 49‑1, l'ISO 4064-2:2014|OIML R 49-2:2013, et l'ISO 4064‑3:2014|OIML R 49‑3 soient utilisées conformément aux règles du système.
L'ISO 4064-2:2014|OIML R 49-2:2013 donne des détails sur le programme d'essai, les principes, l'équipement et les modes opératoires à utiliser pour les essais d'évaluation de type et de vérification primitive d'un type de compteur.
Les dispositions de l'ISO 4064-2:2014|OIML R 49-2:2013 s'appliquent également aux dispositifs auxiliaires, si les réglementations nationales l'exigent.
Les dispositions incluent les exigences d'essai du compteur d'eau complet et des exigences d'essai du transducteur de mesure (incluant le capteur de débit ou de volume) et du calculateur (incluant le dispositif indicateur) d'un compteur d'eau en tant qu'unités séparées.

Vodomeri za merjenje hladne pitne vode in vroče vode - 2. del: Preskusne metode (ISO 4064-2:2014)

Ta del standarda ISO 4064|OIML R 49 se uporablja za vrednotenje vrste vodomerov in začetno preverjanje vodomerov za hladno pitno vodo in vročo vodo, kot je določeno v standardih ISO 4064-1:2014|OIML R 49 1:2013.
Certifikat o skladnosti OIML se lahko izda za vodomere, ki jih zajema sistem certificiranja OIML, če se ta del standardov ISO 4064|OIML R 49, ISO 4064-1:2014|OIML R 49 1:2013 in ISO 4064-3:2014|OIML R 49 3:2013 uporablja v skladu s predpisi sistema.
Ta del standarda ISO 4064|OIML R 49 navaja podrobnosti preskusnega programa, načel, opreme in
postopkov za vrednotenje vrste in začetnega preverjanja vodomera.
Določila tega dela standarda ISO 4064|OIML R 49 se uporabljajo tudi za pomožne naprave, če to zahtevajo nacionalni predpisi.
Ta določila vključujejo zahteve za preskušanje celotnega vodomera in za preskušanje merilnega pretvornika (vključno s senzorjem pretoka) ter kalkulatorja vodomera (vključno s
prikazovalno napravo) kot ločenih enot.

General Information

• Status: Published
• Public Enquiry End Date: 02-Oct-2016
• Publication Date: 08-Aug-2017
• ICS: 17.120.10 - Flow in closed conduits
• ICS: 91.140.60 - Water supply systems
• Technical Committee: IMIN - Measurement instruments
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 10-Jul-2017
• Due Date: 14-Sep-2017
• Completion Date: 09-Aug-2017
• Directive: 2014/32/EU - Directive 2014/32/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of measuring instruments
• Mandate: M/374 - Mandate to CEN and CENELEC for standards in the field of measuring instruments
• Ref Project: EN ISO 4064-2:2017 - Water meters for cold potable water and hot water - Part 2: Test methods (ISO 4064-2:2014)

Relations

• Amended By: SIST EN ISO 4064-2:2017/A11:2023 - Water meters for cold potable water and hot water - Part 2: Test methods (ISO 4064-2:2014)
• Effective Date: 20-May-2020
• Replaces: SIST EN ISO 4064-2:2014 - Water meters for cold potable water and hot water - Part 2: Test methods (ISO 4064-2:2014)
• Effective Date: 01-Sep-2017
• Replaces: SIST EN ISO 4064-2:2014 - Water meters for cold potable water and hot water - Part 2: Test methods (ISO 4064-2:2014)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 4064-2:2017
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
SIST EN ISO 4064-2:2017 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 4064-2:2017

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SIST EN ISO 4064-2:2017


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.

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SIST EN ISO 4064-2:2017
EN ISO 4064-2:2017 (E)
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

2

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SIST EN ISO 4064-2:2017
EN ISO 4064-2:2017 (E)
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.
3

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SIST EN ISO 4064-2:2017
EN ISO 4064-2:2017 (E)
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.
4

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SIST EN ISO 4064-2:2017
EN ISO 4064-2:2017 (E)
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
4
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
5

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SIST EN ISO 4064-2:2017
EN ISO 4064-2:2017 (E)
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
7

8
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
6

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SIST EN ISO 4064-2:2017
EN ISO 4064-2:2017 (E)
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
7

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SIST EN ISO 4064-2:2017
EN ISO 4064-2:2017 (E)
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
8

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SIST EN ISO 4064-2:2017
EN ISO 4064-2:2017 (E)
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.

9

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SIST EN ISO 4064-2:2017

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SIST EN ISO 4064-2:2017
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

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SIST EN ISO 4064-2:2017
ISO 4064-2:2014(E)

COPYRIGHT PROTECTED DOCUMENT
© 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
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved

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SIST EN ISO 4064-2:2017
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 2014 – All rights reserved iii

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SIST EN ISO 4064-2:2017
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

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SIST EN ISO 4064-2:2017
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 suc
...

SLOVENSKI STANDARD
oSIST prEN ISO 4064-2:2016
01-september-2016
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: prEN ISO 4064-2
ICS:
17.120.10 Pretok v zaprtih vodih Flow in closed conduits
91.140.60 Sistemi za oskrbo z vodo Water supply systems
oSIST prEN ISO 4064-2:2016 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN ISO 4064-2:2016

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oSIST prEN ISO 4064-2:2016


DRAFT
EUROPEAN STANDARD
prEN ISO 4064-2
NORME EUROPÉENNE

EUROPÄISCHE NORM

August 2016
ICS 91.140.60 Will supersede 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 draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 92.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN ISO 4064-2:2016 E
worldwide for CEN national Members.

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oSIST prEN ISO 4064-2:2016
prEN ISO 4064-2:2016 (E)
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

2

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oSIST prEN ISO 4064-2:2016
prEN ISO 4064-2:2016 (E)
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 prEN ISO 4064-2:2016 by Technical Committee CEN/TC 92 “Water meters” the
secretariat of which is held by SNV.
This document is currently submitted to the CEN Enquiry.
This document will supersede 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.
For relationship with EU Directive, see informative Annex ZA, which is an integral part of this
document.
Endorsement notice
The text of ISO 4064-2:2014 has been approved by CEN as prEN ISO 4064-2:2016 without any
modification.
3

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oSIST prEN ISO 4064-2:2016
prEN ISO 4064-2:2016 (E)
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.

4

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oSIST prEN ISO 4064-2:2016
prEN ISO 4064-2:2016 (E)
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
2009/137
Note: Amended by Directive
2015/13/EU

I.1.1 and 1.2 Allowable errors, 7.4
I.1.1 and 1.2 Allowable errors,
Rated operating conditions
Rated operating conditions
4 Reference 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
I.1.3.3 Electromagnetic
environments
environments
8.8

8.9

8.10

8.11

8.12

8.13

8.14

8.15
7.44 Adressed
I.1.3.4 Other influences I.1.3.4 Other influences 8.5.3
8.5.4
I.1.4.1 Basic rules for testing I.1.4.1 Basic rules for testing 7.2.2 Adressed
 7.4.2
 7.4.3
 7.4.4
 7.4.5
 8.1
6.4 / 8.4 Adressed, damp heat
I.1.4.2 Ambient humidity I.1.4.2 Ambient humidity
cyclic only
I.2 Reproducibility 7.2.9.3 (EN ISO 4064 Addressed
I.2 Reproducibility
part 1)
I.3 Repeatability I.3 Repeatability 7.4.4 Addressed via
acceptance criteria
Covered by
5

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oSIST prEN ISO 4064-2:2016
prEN ISO 4064-2:2016 (E)
performance tests of 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 I.7.1 Fraudulent use 6.2 , Addressed (sealing
is addressed in 4064
6.4.4
part 1 chapter 6.8)
7.12
I.7.2 Suitable for use I.7.2 Suitable for use 6.4.3 Addressed
 7
8
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 8.17 of

EN ISO 4064 part 2
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 part 1
and 8 chapter 6.1

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 part 1
placing on the market
6.4.3.6.2
chapter 6.8

6.4.4

Annex A
I.8.1 Not to be influenced in I.8.1 Not to be influenced in Not addressed in part Addressed in EN ISO
any admissible way any admissible way 2 4064 part 1 chapter
5.1.1 and 6.3

I.8.2 Securing of hardware I.8.2 Securing of hardware Not addressed in part Addressed in EN ISO
components components 2 4064 part 1 chapter
6.8

I.8.3 Securing and Not addressed in part Addressed in EN ISO
I.8.3 Securing and
identification of software 2 4064 part chapter
identification of software
6.8
I.8.4 Measurement data I.8.4 Measurement data Not addressed in part Addressed in EN ISO
adequately protected against adequately protected against 2 4064 part 1 chapter
corruption corruption 6.8
6

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oSIST prEN ISO 4064-2:2016
prEN ISO 4064-2:2016 (E)
I.8.5 Total quantity supplied Not addressed in part Addressed in EN ISO
I.8.5 Total quantity supplied
not to be reset 2 4064 part 1 chapter
not to be reset
6.8
I.9.1 Inscriptions I.9.1 Inscriptions 6.4.2 Addressed
I.9.2 Marking of packaging and Not addressed in part Addressed in EN ISO
I.9.2 Marking of packaging and
documents 2 4064 part 1 chapter
documents
6.6
I.9.3 Information on operation Not addressed in part Addressed EN ISO
I.9.3 Information on operation 2 4064 part 5 chapter
4.2
I.9.4 Necessity of instruction Not addressed in part Addressed EN ISO
I.9.4 Necessity of instruction
manual 2 4064 part 5 chapter
manual
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
Addressed in EN ISO
Not addressed in part
I.9.7 Unit of measurement I.9.7 Unit of measurement 4064 part 1 chapter
2
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 part 1
chapters 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
7

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oSIST prEN ISO 4064-2:2016
prEN ISO 4064-2:2016 (E)
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 part But addressen in EN
voltage supply and limits of DC voltage supply and limits of DC 2 ISO 4064 part 5
supply supply chapter 4.1
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 MI 7.1.3 Critical change value 8.1.3 Addressed
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 part Addressed in EN ISO
8

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oSIST prEN ISO 4064-2:2016
prEN ISO 4064-2:2016 (E)
2 4064 part 5 chapters
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) / [service(s)] / […] falling
within the scope of this standard.
9

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oSIST prEN ISO 4064-2:2016

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oSIST prEN ISO 4064-2:2016
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

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oSIST prEN ISO 4064-2:2016
ISO 4064-2:2014(E)

COPYRIGHT PROTECTED DOCUMENT
© 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
Case postale 56 • CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 749 09 47
E-mail [e-mail]
Web www.iso.org
Published in Switzerland
ii © ISO 2014 – All rights reserved

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oSIST prEN ISO 4064-2:2016
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 2014 – All rights reserved iii

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oSIST prEN ISO 4064-2:2016
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

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oSIST prEN ISO 4064-2:2016
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, Mea
...