SIST EN ISO 4064-2:2025

Water meters for cold potable water and hot water - Part 2: Test methods (ISO 4064-2:2024)

This document is applicable to the type evaluation and initial verification testing of water meters for cold potable water and hot water as defined in ISO 4064-1:2024|OIML R 49‑1:2024. OIML Certificates of conformity can be issued for water meters under the scope of the OIML Certificate System, provided that this document, ISO 4064-1:2024|OIML R 49‑1:2024 and ISO 4064-3:2024|OIML R 49‑3:2024 are used in accordance with the rules of the system.
This document 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 document 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 4064-2:2024)

Der vorliegende Teil der ISO 4064|OIML R 49 gilt für die Baumusterprüfung und die Ersteichung von Wasserzählern für kaltes Trinkwasser und heißes Wasser, die in ISO 4064 1:xxx|OIML R 49 1:xxx definiert sind. Die OIML Konformitätszertifikate können für Wasserzähler ausgestellt werden, die in den Anwendungsbereich des OIML Zertifizierungssystems fallen, vorausgesetzt, dass dieser Teil der ISO 4064|OIML R 49, ISO 4064 1:xxx|OIML R 49 1:xxx und ISO 4064 3:xxx|OIML R 49 3:xxx in Übereinstimmung mit den Regeln des Systems angewendet werden.
Der vorliegende Teil der ISO 4064|OIML R 49 legt die Einzelheiten des Prüfprogramms, Grundsätze, Ausrüstung und Verfahren fest, die für die Baumusterprüfung und die Ersteichung einer Zählerart zum Einsatz kommen.
Die Bestimmungen des vorliegenden Teils der ISO 4064|OIML R 49 gelten ebenfalls für Zusatzeinrichtungen, sofern diese aufgrund nationaler Vorschriften erforderlich sind.
Die Bestimmungen enthalten Anforderungen an die Prüfung des vollständigen Wasserzählers sowie an die Prüfung des Messwertgebers (einschließlich Durchfluss- und Volumensensor) und des Rechners (einschließlich Anzeigeeinrichtung) von Wasserzählern als eigenständige Einheiten.

Compteurs d'eau potable froide et d'eau chaude - Partie 2: Méthodes d'essai (ISO 4064-2:2024)

Le présent document 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 4064-1:2024|OIML R 49-1:2024. 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 le présent document, l’ISO 4064-1:2024|OIML R 49-1:2024 et l’ISO 4064-3:2024|OIML R 49-3:2024 soient utilisées conformément aux règles du système.
Le présent document 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 du présent document s’appliquent également aux dispositifs complémentaires, 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 4064-2:2024)

General Information

• Status: Published
• Public Enquiry End Date: 28-Dec-2023
• Publication Date: 12-Mar-2025
• 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-Mar-2025
• Due Date: 15-May-2025
• Completion Date: 13-Mar-2025
• 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/541 - [C(2015)8558] Standardization request in support of the implementation of Directive 2014/32/EU on measuring instruments
• Ref Project: EN ISO 4064-2:2025 - Water meters for cold potable water and hot water - Part 2: Test methods (ISO 4064-2:2024)

Relations

• Replaces: 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: 05-Mar-2025
• Revises: SIST EN ISO 4064-2:2017 - Water meters for cold potable water and hot water - Part 2: Test methods (ISO 4064-2:2014)
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2025
Nadomešča:
SIST EN ISO 4064-2:2017/A11:2023
Vodomeri za merjenje hladne pitne vode in vroče vode - 2. del: Preskusne metode
(ISO 4064-2:2024)
Water meters for cold potable water and hot water - Part 2: Test methods (ISO 4064-
2:2024)
Wasserzähler zum Messen von kaltem Trinkwasser und heißem Wasser - Teil 2:
Prüfverfahren (ISO 4064-2:2024)
Compteurs d'eau potable froide et d'eau chaude - Partie 2: Méthodes d'essai (ISO 4064-
2:2024)
Ta slovenski standard je istoveten z: EN ISO 4064-2:2025
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 4064-2
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2025
EUROPÄISCHE NORM
ICS 91.140.60 Supersedes EN ISO 4064-2:2017
English Version
Water meters for cold potable water and hot water - Part
2: Test methods (ISO 4064-2:2024)
Compteurs d'eau potable froide et d'eau chaude - Wasserzähler zum Messen von kaltem Trinkwasser
Partie 2: Méthodes d'essai (ISO 4064-2:2024) und heißem Wasser - Teil 2: Prüfverfahren (ISO 4064-
2:2024)
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 4064-2:2025 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 4064-2:2025) 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 4064-2:2017.
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 4064-2:2024 has been approved by CEN as EN ISO 4064-2:2025 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/EC 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 Clause(s)/subclause(s) Qualifying
32/2014/EU of this EN remarks/Notes
Annex I Essential Requirements
Note: Amended by Directive 2015/13/EU
7.4
I.1.1 and 1.2 Allowable errors, Rated
operating conditions
8.2
I.1.3.1 Climatic environments, temperature
8.3
limits
8.4
8.6
I.1.3.2 Mechanical environments
8.7
8.5
8.8
8.9
8.10
8.11
I.1.3.3 Electromagnetic environments
8.12
8.13
8.14
8.15
8.16
8.5.2
I.1.3.4 Other influences 8.5.3
8.5.4
7.2.2
7.4.2
7.4.3
I.1.4.1 Basic rules for testing 7.4.4
7.4.5
7.4.6
8.1
I.1.4.2 Ambient humidity
8.4
7.10
I.2 Reproducibility
I.3 Repeatability 7.4.4
I.4 Discrimination and sensitivity 6.4.3.6
I.5 Durability 7.11
I.6 Reliability 7.11
6.2
I.7.1 Fraudulent use 6.4.4
7.12
6.4.3
I.7.2 Suitable for use 7
7.4
I.7.3 Unduly biasing
8.17
I.7.5 Robustness and suitability of materials
6.4.3
I.7.6 Allow for control after placing on the
6.4.4
market
Annex A
I.9.1 Inscriptions 6.4.2
I.9.5 Scale interval for the measurand 6.4.3.6.2.1
I.9.7 Unit of measurement 6.4.3.2
I.9.8 Marking properties 6.4.2
I.10.1 Display or hard copy 6.4.3
I.10.2 Reading properties 6.4.3.1
I.10.5 Properties of display for remote reading 6.4.3
I.12 Conformity evaluation 9
Specific Requirements of Annex III for Clause(s)/subclause(s) Qualifying
WATER METERS (MI-001) of this European remarks/Notes
Standard
MI.1 Values of flow rate range 7.4
Note: addresses amendment of Directive
2015/13/EU
7.5
MI.2 Temperature range of the water
7.6
7.3
MI.3 Relative pressure of the water
7.7
MI.4 Nominal value of AC voltage supply and 8.5
limits of DC supply
MI.5 MPE ±2 % for water temperature ≤ 30 °C 7.4.5
for flow rate between Q2 (included) and Q4
MI.5 MPE ±3 % for water temperature > 30 °C 7.4.5
for flow rate between Q2 (included) and Q4
MI.6 MPE ±5 % for any water temperature for 7.4.5
flow rate between Q1 and Q2 (excluded)
7.4.5
MI.6 Non exploitation of MPE
10.1.4
8.1.3
MI.7.1.1 Electromagnetic immunity 8.12
8.13
8.1.3
MI.7.1.2 Condition after electromagnetic
8.12
disturbance
8.13
8.1.3
MI 7.1.3 Critical change value 8.12
8.13
MI 7.2.1 Variation of measurement after 7.11
durability
MI 7.2.2 Error of indication after durability 7.11
MI.8.1 Meter able to be installed in defined 7.4.2.2.7.5
position
MI.8.2 Meter is not designed to measure 7.8
reverse flow
MI.9 Cubic metre 6.4.3.2
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 4064-1|OIML ISO 4064- Water meters for cold EN ISO 4064-1:2025
R 49-1 1:2024|OIML R 49- potable water and hot
1:2024 water — Part 1:
Metrological and technical
requirements
ISO 4064-3 ISO 4064-3:2024 Water meters for cold EN ISO 4064-3:2025
potable water and hot
water — Part 3: Test
report format
ISO/IEC Guide 98- ISO/IEC Guide 98- Uncertainty of None
3:2008 3:2008 measurement — Part 3:
For applicable standard edition
Guide to the expression of
see Column 2
uncertainty in
measurement (GUM:1995)
IEC 60068-2-1 IEC 60068-2- Environmental testing — EN 60068-2-1:2007
1:2007 Part 2-1: Tests — Test A:
Cold
IEC 60068-2-2 IEC 60068-2- Environmental testing — EN 60068-2-2:2007
2:2007 Part 2-2: Tests — Test B:
Dry heat
IEC 60068-2-30 IEC 60068-2- Environmental testing — EN 60068-2-30:2005
30:2005 Part 2-30: Tests — Test
Db: Damp heat, cyclic
(12 h + 12 h cycle)
IEC 60068-2-31 IEC 60068-2- Environmental testing — EN 60068-2-31:2008
31:2008 Part 2-31: Tests — Test Ec:
Rough handling shocks,
primarily for equipment-
type specimens
IEC 60068-2-47 IEC 60068-2- Environmental testing — EN 60068-2-47:2005
47:2005 Part 2-47: Tests —
Mounting of specimens for
vibration, impact and
similar dynamic tests
IEC 60068-2-64 IEC 60068-2- Environmental testing — EN 60068-2-
64:2008+AMD1:20 Part 2-64: Tests — Test Fh: 64:2008+AMD1:2019
19 Vibration, broadband
random and guidance
IEC 60068-3-4 IEC 60068-3- Environmental testing — IEC 60068-3-4:2002
4:2001 Part 3-4: Supporting
documentation and
Column 1 Column 2 Column 3 Column 4
Reference in International
Title Corresponding European
Clause 2 Standard Edition
Standard Edition
guidance — Damp heat
tests
IEC 60654-2 IEC 60654-2:1979 Operating conditions for EN 60654-2:1997
industrial process
measurement and control
equipment — Part 2:
Power
IEC 61000-2-1 IEC TR 61000-2- Electromagnetic None
1:1990 compatibility (EMC) —
For applicable standard edition
Part 2: Environment —
see Column 2
Section 1: Description of
the environment —
Electromagnetic
environment for low-
frequency conducted
disturbances and signaling
in public power supply
systems
IEC 61000-2-2 IEC 61000-2- Electromagnetic EN 61000-2-2/A2:2019
2/AMD2:2018 compatibility (EMC) —
And
Part 2-2: Environment —
EN 61000-2-2:2002/A1:2017
Compatibility levels for
low-frequency conducted
disturbances and signaling
in public low-voltage
power supply systems
IEC 61000-4-1 IEC TR 61000-4- Electromagnetic None
1:2016 compatibility (EMC) —
For applicable standard edition
Part 4-1: Testing and
see Column 2
measurement techniques
— Overview of IEC 61000-
4 series
IEC 61000-4-2 IEC 61000-4- Electromagnetic None
2:2008 compatibility (EMC) —
For applicable standard edition
Part 4-2: Testing and
see Column 2
measurement techniques
— Electrostatic discharge
immunity test
IEC 61000-4-3 IEC 61000-4- Electromagnetic EN 61000-4-3:2006
3:2020 compatibility (EMC) —
and
Part 4-3: Testing and
EN IEC 61000-4-3:2020
measurement techniques
and
— Radiated, radio
EN 61000-4-3:2006/A2:2010
frequency, electromagnetic
field immunity test
and
Column 1 Column 2 Column 3 Column 4
Reference in International
Title Corresponding European
Clause 2 Standard Edition
Standard Edition
EN 61000-4-3:2006/IS1:2009
And
EN 61000-4-3:2006/A1:2008
(all Active!)
IEC 61000-4-4 IEC 61000-4- Electromagnetic EN 61000-4-4:2012
4:2012 LRV compatibility (EMC) —
Part 4-4: Testing and
measurement techniques
— Electrical fast
transient/burst immunity
test
IEC 61000-4-5 IEC 61000-4- Electromagnetic EN 61000-4-5:2014/A1:2017
5:2014+AMD1:201 compatibility (EMC) —
7 CSV Part 4-5: Testing and
measurement techniques
— Surge immunity test
IEC 61000-4-6 IEC 61000-4- Electromagnetic EN 61000-4-6:2014/AC:2015
6:2013 compatibility (EMC) —
Part 4-6: Testing and
measurement techniques
— Immunity to conducted
disturbances, induced by
radio-frequency fields
IEC 61000-4-11 IEC 61000-4- Electromagnetic EN 61000-4-11:2004/A1:2017
11:2020 RLV compatibility (EMC) —
And
Part 4-11: Testing and
EN IEC 61000-4-
measurement techniques
11:2020/AC:2020-06
— Voltage dips, short
interruptions and voltage
variations immunity tests
IEC 61000-6-1 IEC 61000-6- Electromagnetic EN IEC 61000-6-1:2019
1:2016 RLV compatibility (EMC) —
Part 6-1: Generic standards
— Immunity for
residential, commercial
and light-industrial
environments
IEC 61000-6-2 IEC 61000-6- Electromagnetic None
2:2016 RLV compatibility (EMC) —
For applicable standard edition
Part 6-2: Generic standards
see Column 2
— Immunity for industrial
environments
OIML D 11:2004 General requirements for
electronic measuring
instruments
Column 1 Column 2 Column 3 Column 4
Reference in International
Title Corresponding European
Clause 2 Standard Edition
Standard Edition
OIML G 13 Planning of metrology and
testing laborat
...