EN 14154-3:2005

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Water meters - Part 3 : Test methods and equipmentVodomeri - 3. del: Preskusne metode in opremaCompteurs d'eau - Partie 3 : Méthodes et équipment d'essaiWasserzähler - Teil 3: Prüfverfahren und -einrichtungenTa slovenski standard je istoveten z:EN 14154-3:2005SIST EN 14154-3:2005en91.140.60Sistemi za oskrbo z vodoWater supply systemsICS:SLOVENSKI
STANDARDSIST EN 14154-3:200501-maj-2005

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14154-3February 2005ICS 91.140.60English versionWater meters - Part 3 : Test methods and equipmentCompteurs d'eau - Partie 3 : Méthodes et équipmentd'essaiWasserzähler - Teil 3: Prüfverfahren und -einrichtungenThis European Standard was approved by CEN on 26 July 2004.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14154-3:2005: E

Irregularity in water velocity field.46 A.1 Irregularity in water velocity field.46 A.2 Flow disturbers.46 Annex B (informative)
Examples of methods and components used for testing Concentric Water Meters.57 Annex C (normative)
Equipment and method used to determine meter error.60 C.1 Principle.60 C.2 Description of the test rig.60 C.3 Pipe-work.60 C.3.1 Description.60 C.3.2 Test section.61 C.3.3 Precautions to be taken during tests.61 C.3.4 Special arrangements for the installation of meters.61

Equipment and methods for pressure loss test.65 D.1 Principle.65 D.2 Pressure loss test equipment.65 D.2.1 General.65 D.2.2 Measuring section.65 D.3 Test procedure.69 D.3.1 Determination of pressure loss attributable to pipe lengths for water meters (measurement 1)69 D.3.2 Measurement and calculation of the actual ∆∆∆∆P of a water meter (measurement 2).70 Annex E (informative)
Characteristics of reference devices.71 E.1 General.71 E.2 Types of reference devices.71 E.2.1 Calibration using volumetric vessels.71 E.2.2 Calibration using reference meters (master meters).72 E.2.3 Calibration using calibrated tubes.73 E.2.4 Calibration by weighing method.74 E.2.5 Other calibration methods.74 Bibliography.75

For meters T ≥ 70: (50 ± 5) °C Working (water) pressure: 200 kPa (2,0 bar) Ambient temperature range: 15 °C to 25 °C* Ambient relative humidity range: 45 % to 75 %* Ambient atmospheric pressure range: 86 kPa to 106 kPa (0,86 bar to 1,06 bar) Power supply voltage (mains a.c.): Nominal voltage (Unom) ± 5 % Power supply frequency: Nominal frequency (fnom) ± 2 % Power supply voltage (battery): A voltage U in the range; Umin ≤ U ≤ Umax During each test, the temperature and relative humidity shall not vary by more than 5 °C or 10 % respectively within the reference range. * Here the ambient temperature and/or ambient relative humidity exceed the above-mentioned ranges, the effect on the error (of indication) shall be taken in account. 4 Administrative and external examination for approval programme The meter and its technical documentation shall be examined before entering the rest of the test program. The administrative examination shall demonstrate that the water meter fulfils the respective requirements of Clause 4 of EN 14154-1:2005, which can be verified by administrative work and shall show that the meter is manufactured in conformity with it. The following documents shall be examined, as far as is relevant, for the respective water meter:  general description of the water meter and its working principle;

Where the initial error curve is close to the maximum permissible error at a point other than at Q1, Q2 or Q3, if this error can be shown to be typical of the meter type, the approving authority may choose to define an alternative flowrate for initial verification in the pattern approval certificate. b) Test the water meter without its supplementary devices (if any) attached; c) during a test hold all other influence factors at reference conditions; d) measure the errors (of indication) at other flowrates if required, depending on the shape of the error curve; e) calculate the relative error (of indication) for each flowrate. 5.3.4 Acceptance criteria a) The errors observed for each of the seven flowrates shall not exceed the maximum permissible errors. If the error observed on one or more meters is greater than the maximum permissible error at one flowrate only, the test at that flowrate shall be repeated. The test shall be declared satisfactory if two out of the three results lie within the maximum permissible error and the arithmetic mean of the results for the three tests at that flowrate is less than or equal to the maximum permissible error; b) if all the errors (of indication) of the water meter have the same sign, at least one of these errors shall not exceed one half of the maximum permissible error. In all cases this requirement shall be applied equitably with respect to the water supplier and the consumer. 5.4 Error (of indication) tests 5.4.1 Object of test To verify that the meter complies with the requirements in 8 of EN 14154-1:2005. 5.4.2 Preparation Apply the installation and operational requirements described in 5.3.2. 5.4.3 Test Procedure a) Take the intrinsic error of the water meter for the defined flowrate(s); b) apply the influence quantity to be tested;
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