INTERNATIONAL STANDARD
Watermetersforcoldpotablewater andhotwater-
Part 1: Metrological and technical requirements
Compteurs d'eau potable froideet d'eau chaude-Partie1:Exigencesmetrologiqueset techniques
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Contents
Page
3.1 Watermeter anditsconstituents. 13.2 Metrological characteristics. 53.3 Operating conditions. 63.4 Test conditions. .83.5 Electronic and electrical equipment.. 103.6 UseofcertaintermswithintheEuropeanEconomicArea. 11
Metrologicalrequirements. 11
4.1 Values ofQ1 Q2 Q3 andQ4 114.2 Accuracy class andmaximum permissible error. 124.3 Requirements for meters and ancillary devices. 13
Watermetersequippedwithelectronicdevices. .15
5.1 Generalrequirements. 155.2 Power supply 15
Technicalrequirements.6.1 Materials and construction of watermeters. 166.2 Adjustment and correction.. 176.3 Installation conditions. 176.4 Rated operating conditions.. 196.5 Pressure loss.. 196.6 Marks and inscriptions. 196.7 Indicatingdevice 216.8 Protection devices. 24
Metrological controls. .24
7.1 Reference conditions. 247.2 Type evaluation and approval. 257.3 Initial verification. 29
Foreword
bodies (IsO member bodies).The work of preparing International Standards is normally carried outmittee has been established has theright toberepresented onthat mittee.Internationalorganizations governmental andnon-governmental inliaison with ISo also take partin the work.ISOcollaborates closelywiththeInternationalElectrotechnical Commission(IEC)on all matters ofelectrotechnicalstandardization.
The procedures used to develop this document and those intended for itsfurther maintenance aredifferent types of Iso documents should be noted.This document was drafted in accordance with theeditorialrules of theISo/IECDirectives Part 2
Attentionis drawnto thepossibility that someof theelementsof thisdocumentmaybethesubject ofpatentrightsidentifiedduringthedevelopment of thedocumentwill beintheIntroduction and/or on the ISOlist of patent declarations received
Any trade name used in this document is information given for the convenience of users and does notconstitute anendorsement.
ThemitteesresponsibleforthisdocumentareTechnicalCommitteeISo/TC30 Measurementoffluidflowinclosed conduits SubmitteeSC 7 Volumemethodsincludingwatermeters andOIML TechnicalSubmitteeTC8/SC5Watermeters.
ThisfourtheditionofISO4064-1cancels andpartiallyreplacesthethirdedition(ISO4064-1:2005) which
ISO4064 consists ofthefollowing parts under the generaltitleWatermetersforcold potablewater andhotwater:
-Part 1:Metrological and technicalrequirements-Part 2:Test methods-Part5:Installationrequirements
This edition of ISO4064-1is identical to the correspondingedition of OIMLR 49-1 which has beenissuedconcurrently.OIMLR49-1was approvedforfinalpublicationbytheInternationalCommitteeofLegal Metrology atits 48thmeetinginHo Chi Minh City Vietnam in October2013.It willbe submittedto theInternational Conference onLegalMetrologyin2016forformalsanction.
Watermetersforcoldpotablewaterandhotwater-
Part 1: Metrological andtechnicalrequirements
1Scope
Thispartof ISO4064lOIMLR49specifiesthemetrologicaland technicalrequirementsforwatermetersforcold potablewaterand hotwaterflowingthroughafullycharged closed conduit.These watermetersincorporatedeviceswhichindicatetheintegratedvolume.
In addition towatermetersbased onmechanicalprinciples thispart ofISO4064|OIMLR49 appliestodevices based onelectricalorelectronic principles andmechanical principlesincorporating electronicdevices used tomeasure the volume of cold potable water and hot water.
optional. However it is possible for national or regional regulations to render some ancillary devicesmandatoryinrelationtotheutilizationofwatermeters.
NOTEAny national regulations apply in the country of use.
2Normativereferences
The following documents in whole or in part are normatively referenced in this document and areindispensable for its application.For datedreferences only the edition cited applies.For undatedreferences thelatesteditionofthereferenceddocument(includinganyamendments)applies.
ISO 4064-2:2014|OIMLR 49-2:2013 Watermetersfor cold potable water andhot water -Part 2:Testmethods
3Terms and definitions
Forthepurposes of this document thefollowing definitions apply
NOTEThis terminology conforms to that used inISO/IEC Guide 99:2007|OIMLV 2-200:2012 [1] OIMLV 1:2013[2] and OIML D 11.[3] Modified versions of some terms defined in Referencesl1]-[3] are listed here.
3.1Watermeteranditsconstituents
3.1.1
watermeter
instrumentintended to measure continuously memorize and displaythevolume ofwater passingthrough themeasurement transducer at meteringconditions
correction devices if present) and an indicating device.These three devices can be in different housings.
Note 2 to entry: A water meter may be a bination meter (see 3.1.16).
Note 3 to entry: In this International Standard a water meter is also referred to as a“meter”
