FprEN ISO 4064-1

SLOVENSKI STANDARD
oSIST prEN ISO 4064-1:2023
01-december-2023
Vodomeri za merjenje hladne pitne vode in vroče vode - 1. del: Metrološke in
tehnične zahteve (ISO/DIS 4064-1:2023)
Water meters for cold potable water and hot water - Part 1: Metrological and technical
requirements (ISO/DIS 4064-1:2023)
Wasserzähler zum Messen von kaltem Trinkwasser und heißem Wasser - Teil 1:
Metrologische und technische Anforderungen (ISO/DIS 4064-1:2023)
Compteurs d'eau potable froide et d'eau chaude - Partie 1: Exigences métrologiques et
techniques (ISO/DIS 4064-1:2023)
Ta slovenski standard je istoveten z: prEN ISO 4064-1
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 4064-1:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO 4064-1:2023
oSIST prEN ISO 4064-1:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 4064-1
ISO/TC 30/SC 7 Secretariat: BSI
Voting begins on: Voting terminates on:
2023-10-09 2024-01-01
Water meters for cold potable water and hot water —
Part 1:
Metrological and technical requirements
Compteurs d'eau potable froide et d'eau chaude —
Partie 1: Exigences métrologiques et techniques
ICS: 91.140.60
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
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NATIONAL REGULATIONS.
ISO/DIS 4064-1:2023(E)
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. © ISO 2023

oSIST prEN ISO 4064-1:2023
ISO/DIS 4064-1:2023(E)
DRAFT INTERNATIONAL STANDARD
ISO/DIS 4064-1
ISO/TC 30/SC 7 Secretariat: BSI
Voting begins on: Voting terminates on:

Water meters for cold potable water and hot water —
Part 1:
Metrological and technical requirements
Compteurs d'eau potable froide et d'eau chaude —
Partie 1: Exigences métrologiques et techniques
ICS: 91.140.60
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
© ISO 2023
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
NOT BE REFERRED TO AS AN INTERNATIONAL
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on STANDARD UNTIL PUBLISHED AS SUCH.
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WHICH REFERENCE MAY BE MADE IN
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NATIONAL REGULATIONS.
Website: www.iso.org ISO/DIS 4064-1:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
Published in Switzerland
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
ii
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023

oSIST prEN ISO 4064-1:2023
ISO/DIS 4064-1:2023(E)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
3.1 Water meter and its constituents . 1
3.2 Metrological characteristics . 5
3.3 Operating conditions . 6
3.4 Test conditions . 8
3.5 Electronic and electrical equipment . 10
3.6 Use of certain terms within the European Economic Area. 11
4 Metrological requirements . .11
4.1 Values of Q , Q , Q , and Q . 11
1 2 3 4
4.2 Accuracy class and maximum permissible error .12
4.2.1 General .12
4.2.2 Accuracy class 1 water meters .12
4.2.3 Accuracy class 2 water meters .12
4.2.4 Meter temperature classes .12
4.2.5 Water meters with separable calculator and measurement transducer .13
4.2.6 Relative error of indication . 13
4.2.7 Reverse flow . 13
4.2.8 Water temperature and water pressure . 13
4.2.9 Absence of flow or of water . 13
4.2.10 Static pressure . 14
4.3 Requirements for meters and ancillary devices . 14
4.3.1 Connections between electronic parts . 14
4.3.2 Adjustment device . 14
4.3.3 Correction device . 14
4.3.4 Calculator . 14
4.3.5 Indicating device .15
4.3.6 Ancillary devices . 15
5 Water meters equipped with electronic devices .15
5.1 General requirements . 15
5.2 Power supply . 16
5.2.1 General . 16
5.2.2 External power supply . 16
5.2.3 Non-replaceable battery . 17
5.2.4 Replaceable battery . 17
6 Technical requirements .18
6.1 Materials and construction of water meters . 18
6.2 Adjustment and correction . . 18
6.3 Installation conditions . 18
6.4 Rated operating conditions . 20
6.5 Pressure loss . 20
6.6 Marks and inscriptions . 21
6.7 Indicating device . .22
6.7.1 General requirements .22
6.7.2 Types of indicating device . 23
6.7.3 Verification devices — First element of an indicating device — Verification
scale interval . 24
6.8 Protection devices . 25
6.8.1 General . 25
6.8.2 Electronic sealing devices . 25
iii
oSIST prEN ISO 4064-1:2023
ISO/DIS 4064-1:2023(E)
7 Metrological controls .26
7.1 Reference conditions .26
7.2 Type evaluation and approval . 26
7.2.1 External examination . 26
7.2.2 Number of samples .26
7.2.3 Errors (of indication) . 26
7.2.4 Repeatability .
...