ISO INTERNATIONAL STANDARD 4064-1 Fourth edition 2014-06-01 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 metrologiques et techniques Reference number IS0 4064-1:2014(E) LSO @ IS0 2014 ed without license from IHS Not for Resale IS0 4064-1:2014(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2014 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 copyright@iso.org Web www.iso.org Published in Switzerland @ IS0 2014 - All rights reserved Not for Resale IS0 4064-1:2014(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references .1 3 Terms and definitions 3.1 Water meter and its constituents. .1 3.2 Metrologicalcharacteristics 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 Q1, Q2, Q3, and Q4 ·11 4.2 Accuracy class and maximum permissible error .12 4.3 Requirements for meters and ancillary devices. ..13 5 Water meters equipped with electronic devices .15 5.1 General requirements .15 5.2 Power supply .15 6 Technical requirements. ..16 6.1 Materials and construction of water meters .16 6.2 Adjustment and correction. ..17 6.3 Installation conditions .17 6.4 Rated operating conditions 19 6.5 Pressureloss .19 6.6 Marks and inscriptions 19 6.7 Indicating device .21 6.8 Protection devices. .24 Metrological controls .24 7.1 Reference conditions 24 7.2 Type evaluation and approval 25 7.3 Initial verification.. .29 Annex A (normative) Performance tests for water meters with electronic devices ..31 Annex B (normative) Checking facilities. .33 AnnexC(informative)Permissibleerrorsinserviceandsubsequentverification ..37 Bibliography .38 iii se with ISt ed without license from IHS Not for Resale