EN 14154-2:2005+A2:2011

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Vodomeri - 2. del: Vgradnja in pogoji uporabeWasserzähler - Teil 2: Einbau und Voraussetzungen für die VerwendungCompteurs d'eau - Partie 2: Installation et conditions d'utilisationWater meters - Part 2: Installation and conditions of use91.140.60Sistemi za oskrbo z vodoWater supply systemsICS:Ta slovenski standard je istoveten z:EN 14154-2:2005+A2:2011SIST EN 14154-2:2005+A2:2011en,de01-julij-2011SIST EN 14154-2:2005+A2:2011SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14154-2:2005+A2
April 2011 ICS 91.140.60 Supersedes EN 14154-2:2005+A1:2007English Version
Water meters - Part 2: Installation and conditions of use
Compteurs d'eau - Partie 2: Installation et conditions d'utilisation
Wasserzähler - Teil 2: Einbau und Voraussetzungen für die Verwendung This European Standard was approved by CEN on 26 August 2004 and includes Amendment 1 approved by CEN on 6 March 2007 and Amendment 2 approved by CEN on 22 February 2011.
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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14154-2:2005+A2:2011: ESIST EN 14154-2:2005+A2:2011

#Concentric manifold solutions$ . 16Annex B (normative)
#Connection interfaces - Solutions for cartridge meters . 18B.1Concentric cartridge meters . 18B.2Axial cartridge meters$ . 28Annex C (informative)
#Examples of adaptors and converters$ . 33SIST EN 14154-2:2005+A2:2011

!Relationship between this European Standard and the Essential Requirements of EU Directive 22/2004/EC on Measuring Instruments" . 36Bibliography . 39 SIST EN 14154-2:2005+A2:2011

 combination meters, care should be taken that 'cross-over' flowrates are different from (and below) normal operating flowrates;  available supply pressure;  physical and chemical characteristics of the water;  possibility of deposition of substances from solution within the water meter;  acceptable pressure loss across the meter;  available space and pipe work to install the meter and fittings;  sustainability of the power supply of the water meter (where applicable). 4.2 Information to be provided by the manufacturer The manufacturer shall supply sufficient information to enable the correct choice and installation of a meter: such that influencing factors shall not lead to either failure or non conformance with the specified metrological characteristics. This is particularly important for hydraulic disturbances. Specifically, the manufacturer shall determine the influence factors, which affect the indicating error and state of the individual meter design. For each influence factor the manufacturer shall state the relevant rated operating conditions applicable to the meter. 4.3 Meters operating in parallel or in a group For meters operating in parallel, means shall be provided so that the unserviceability of one or more meters within a group shall not cause the remaining meters to operate at a flowrate in excess of each individual meter’s limit of operation. In order to ensure that water meters of different types will operate satisfactorily in parallel, the individual characteristics of all the meters operating in parallel shall be compatible. This may be achieved, for example, by grouping them according to pressure loss, flowrate range and maximum working pressure. However, the installation conditions for each type shall be respected. For meters operating in parallel and multiple meter operation, the possibilities of interaction between one meter or meter type and another, to the detriment of their life and accuracy shall be considered; for example pressure surges and vibration. SIST EN 14154-2:2005+A2:2011

Key a Bad b Good 1 Feed line 2 Main line Figure 1 A compatible flow straightening device may be used upstream of the water meter to reduce or even eliminate the straight lengths of pipe detailed above. However, the instructions of the meter manufacturer shall be followed. NOTE Special consideration should be given to bi-directional applications. 5.1.3.4 #Adaptors and converters The use of adaptors as defined under 3.3 is not permitted on cartridge meters and their related connection interfaces. The application of converters, as defined under 3.4, however, which are not adaptors in the context of a cartridge meter systems, is permitted. Examples of converters are shown in Annex C.$ 5.1.4 Water quality (suspended particles) If, for the specific installation conditions, the accuracy of measurement of volume flow by the water meter is likely to be affected by the presence of suspended particles in the water, then it may be installed with a strainer or filter. The strainer or filter should be placed either at the inlet of the water meter or in the pipework upstream. 5.1.5 Electromagnetic meters To ensure accurate measurement and prevent galvanic corrosion at the electrodes the meter and the measured fluid shall be electrically connected at the same potential. Whilst in general this means grounding the water, the manufacturer’s individual installation instructions for a particular meter design shall be followed. On a conducting but uninsulated fluid pipe, without a non-conducting internal coating, the connecting point(s) of the meter’s primary element shall be electrically linked to the secondary element and both connected to ground. On non-conducting pipes, or pipes isolated from the fluid, metal grounding rings shall be interposed between the pipe and the primary element of the meter. These shall be electrically linked to the secondary element and both to ground. Where the fluid cannot be grounded for technical reasons, the meter may be connected without referencing the fluid potential but only when the meter model and manufacturer’s instructions permit. SIST EN 14154-2:2005+A2:2011

Where national regulation(s) neither exist nor apply, protection against reverse water flow shall be provided when the type of meter installed is designed or specified to correctly meter in one direction only and where reverse flow could cause either (i) failure to comply with MPE or (ii) lead to the deterioration of the meter.
Where the meter design provides for correct metering of reverse flow without detriment, a reverse flow indicating device may be implemented as an alternative to protection. For example: in the case of a bi-directional electromagnetic mete
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