SIST EN ISO 4064-1:2025
(Main)Water meters for cold potable water and hot water - Part 1: Metrological and technical requirements (ISO 4064-1:2024)
Water meters for cold potable water and hot water - Part 1: Metrological and technical requirements (ISO 4064-1:2024)
This document specifies the metrological and technical requirements for water meters for cold potable water and hot water flowing through a fully charged, closed conduit. These water meters incorporate devices which indicate the accumulated volume.
In addition to water meters based on mechanical principles, this document applies to devices based on electrical or electronic principles, and mechanical principles incorporating electronic devices, used to measure the volume of cold potable water and hot water.
This document also applies to electronic ancillary devices. Ancillary devices are optional. However, it is possible for national or regional regulations to render some ancillary devices mandatory in relation to the utilization of water meters.
NOTE Any national regulations apply in the country of use.
Wasserzähler zum Messen von kaltem Trinkwasser und heißem Wasser - Teil 1: Metrologische und technische Anforderungen (ISO 4064-1:2024)
Der vorliegende Teil der ISO 4064|OIML R 49 legt die metrologischen und technischen Anforderungen für Wasserzähler für kaltes Trinkwasser und heißes Wasser fest, das durch eine vollkommen gefüllte, geschlossene Leitung fließt. Diese Wasserzähler sind mit Einrichtungen versehen, die das kumulierte Volumen anzeigen.
Zusätzlich zu den auf mechanischen Funktionsprinzipien beruhenden Wasserzählern gilt der vorliegende Teil der ISO 4064|OIML R 49 außerdem für Einrichtungen nach elektrischem oder elektronischem Funktionsprinzip und nach mechanischem Funktionsprinzip mit elektronischen Einrichtungen, die zur Messung des Volumens von kaltem Trinkwasser und heißem Wasser dienen.
Dieser Teil der ISO 4064|OIML R 49 gilt außerdem für elektronische Zusatzeinrichtungen. Zusatzeinrichtungen sind optional. Jedoch können in nationalen oder internationalen Regelungen einige Zusatzeinrichtungen hinsichtlich der Verwendung von Wasserzählern verbindlich vorgeschrieben sein.
ANMERKUNG In den Anwendungsländern gelten nationale Vorschriften.
Compteurs d'eau potable froide et d'eau chaude - Partie 1: Exigences métrologiques et techniques (ISO 4064-1:2024)
Le présent document spécifie les exigences métrologiques et techniques applicables aux compteurs d’eau potable froide et d’eau chaude circulant dans une conduite fermée entièrement chargée. Ces compteurs d’eau comportent des dispositifs indiquant le volume cumulé.
En plus des compteurs d’eau dont le fonctionnement est basé sur des principes mécaniques, le présent document s’applique aux dispositifs dont le fonctionnement est basé sur un principe électrique ou électronique, ainsi qu’à un fonctionnement mécanique incluant des dispositifs électroniques utilisés pour mesurer le volume débité d’eau potable froide et d’eau chaude.
Le présent document s’applique également aux dispositifs électroniques complémentaires. Les dispositifs complémentaires sont facultatifs. Il est cependant possible que des réglementations nationales ou régionales rendent certains dispositifs complémentaires obligatoires selon l’utilisation des compteurs d’eau.
NOTE Toute réglementation nationale est applicable dans le pays d’utilisation.
Vodomeri za merjenje hladne pitne vode in vroče vode - 1. del: Metrološke in tehnične zahteve (ISO 4064-1:2024)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2025
Nadomešča:
SIST EN ISO 4064-1:2017/A11:2023
Vodomeri za merjenje hladne pitne vode in vroče vode - 1. del: Metrološke in
tehnične zahteve (ISO 4064-1:2024)
Water meters for cold potable water and hot water - Part 1: Metrological and technical
requirements (ISO 4064-1:2024)
Wasserzähler zum Messen von kaltem Trinkwasser und heißem Wasser - Teil 1:
Metrologische und technische Anforderungen (ISO 4064-1:2024)
Compteurs d'eau potable froide et d'eau chaude - Partie 1: Exigences métrologiques et
techniques (ISO 4064-1:2024)
Ta slovenski standard je istoveten z: EN ISO 4064-1:2025
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 4064-1
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2025
EUROPÄISCHE NORM
ICS 91.140.60 Supersedes EN ISO 4064-1:2017
English Version
Water meters for cold potable water and hot water - Part
1: Metrological and technical requirements (ISO 4064-
1:2024)
Compteurs d'eau potable froide et d'eau chaude - Wasserzähler zum Messen von kaltem Trinkwasser
Partie 1: Exigences métrologiques et techniques (ISO und heißem Wasser - Teil 1: Metrologische und
4064-1:2024) technische Anforderungen (ISO 4064-1:2024)
This European Standard was approved by CEN on 23 September 2024.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2025 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4064-1:2025 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
This document (EN ISO 4064-1:2025) has been prepared by Technical Committee ISO/TC 30
"Measurement of fluid flow in closed conduits" in collaboration with 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 August 2025, and conflicting national standards shall
be withdrawn at the latest by August 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 4064-1:2017.
This document has been prepared under a standardization request addressed to CEN by the European
Commission. The Standing Committee of the EFTA States subsequently approves these requests for its
Member States.
For the relationship with EU Legislation, see informative Annex ZA, which is an integral part of this
document.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 4064-1:2024 has been approved by CEN as EN ISO 4064-1:2025 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/541 EN” to provide one
voluntary means of conforming to essential requirements of Directive 2014/32/EU of the European
Parliament and the Council of 26 February 2014 on measuring instruments.
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 and
application of the edition of the normatively referenced standards as given in Table ZA.2 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.
Table ZA.1 — Correspondence between this European Standard and Annex I of Directive
2014/32/EU.
Essential Requirements (ERs) of Directive
32/2014/EU Clause(s)/sub-clause(s) Qualifying remarks/
Annex I Essential Requirements
of this EN Notes
Note: Amended by Directive 2015/13/EU
4.2.1
4.2.2
I.1.1 and 1.2 Allowable errors, Rated
4.2.3
operating conditions
4.2.8
6.4
6.4
I.1.3.1 Climatic environments, temperature
A.2
limits
A.5
A.2
I.1.3.2 Mechanical environments
A.5
A.3
I.1.3.3 Electromagnetic environments
A.5
7.2.12.2.2
I.1.3.4 Other influences
Annex A table A.1
7.1
I.1.4.1 Basic rules for testing
A.1
8.4
I.1.4.2 Ambient humidity
Annex A.5 table A.1
I.2 Reproducibility 7.2.9.3
I.3 Repeatability 7.2.4
6.7.2
I.4 Discrimination and sensitivity
6.7.3.2
4.2
I.5 Durability
7.2.6
I.6 Reliability 6.1
6.1.7
I.7.1 Fraudulent use
6.8
6.1.8
I.7.2 Suitable for use 6.7.1
6.4
6.1.9
I.7.3 Unduly biasing
6.2
I.7.5 Robustness and suitability of materials 6.1
4.3.4
5.1.3
I.7.6 Allow for control after placing on the
market and put into use
6.7.1
Annex B
4.3.4
5.1.1
I.8.1 Not to be influenced in any admissible
6.3
way
6.8.2.2.
6.8.2.3
I.8.2 Securing of hardware components 6.8
I.8.3 Securing and identification of software 6.8
I.8.4 Measurement data adequately protected
6.8
against corruption
I.8.5 Total quantity supplied not to be reset 6.8
I.9.1 Inscriptions 6.6
I.9.2 Marking of packaging and documents 6.6
6.3
I.9.3 Information on operation
6.6
6.7. 3.2.1
I.9.5 Scale interval for the measurand
6.7.3.2.3
I.9.7 Unit of measurement 6.7.1.2
6.6.1
I.9.8 Marking properties
6.6.2
I.10.1 Display or hard copy 6.7.2
I.10.2 Reading properties 6.7.1.1
I.10.5 Properties of display for remote
6.1.8
reading
3.6
I.12 Conformity evaluation
7.2
MI.1 Values of flow rate range
4.1
Note: addresses amendment of Directive
6.4
2015/13/EU
Clause(s)/subclause(s)
Specific Requirements of Annex III for Qualifying
of this European
WATER METERS (MI-001) remarks/Notes
Standard
4.2.4
MI.2 Temperature range of the water
6.4
4.2.8
MI.3 Relative pressure of the water
6.4
MI.4 Nominal value of AC voltage supply and
5.2
limits of DC supply
MI.5 MPE ±2 % for water temperature ≤
30 °C for flow rate between Q2 (included) 4.2.3
and Q4
MI.5 MPE ±3 % for water temperature >
30 °C for flow rate between Q2 (included) 4.2.3
and Q4
MI.6 MPE ±5 % for any water temperature
4.2.3
for flow rate between Q1 and Q2 (excluded)
4.3.3
6.1.9
MI.6 Non exploitation of MPE 6.2.1
7.2.3
7.3.6
MI.7.1.1 Electromagnetic immunity A.3
5.1.1
MI.7.1.2 Condition after electromagnetic
A.3
disturbance
A.5
5.1.2
MI 7.1.3 Critical change value
A.3
MI 7.2.1 Variation of measurement after
7.2.6.3
durability
MI 7.2.2 Error of indication after durability 7.2.6.3
MI.8.1 Meter able to be installed in defined
7.2.3
position
MI.8.2 Meter is not designed to measure
4.2.7
reverse flow
MI.9 Cubic metre 6.7.1.2
Table ZA.2 — Normative references from Clause 2 of this document and their corresponding
European publications
Column 1 Column 2 Column 3 Column 4
Reference in International
Title Corresponding European
Clause 2 Standard Edition
Standard Edition
ISO 4064- ISO 4064- Water meters for cold EN ISO 4064-2:2025
2:2024¦OIML R 2:2024¦OIML R 49- potable water and hot
49-2:2024 2:2024 water — Part 2: Test
methods
The documents listed in the Column 1 of Table [ZA.2], in whole or in part, are normatively referenced in
this document, i.e. are indispensable for its application. The achievement of the presumption of
conformity is subject to the application of the edition of Standards as listed in Column 4 or, if no
European Standard Edition exists, the International Standard Edition given in Column 2 of Table [ZA.2].
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
Standard
ISO 4064-1
Fifth edition
Water meters for cold potable water
2024-12
and hot water —
Part 1:
Metrological and technical
requirements
Compteurs d'eau potable froide et d'eau chaude —
Partie 1: Exigences métrologiques et techniques
Reference number
ISO 4064-1:2024(en) © ISO 2024
ISO 4064-1:2024(en)
© ISO 2024
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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.
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Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 4064-1:2024(en)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Water meter and its constituents .2
3.2 Metrological characteristics .5
3.3 Operating conditions .7
3.4 Test conditions .8
3.5 Electronic and electrical equipment .10
4 Metrological requirements . .11
4.1 Values of Q , Q , Q , and Q .
...
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