EN 14154-3:2005+A1:2007

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 équipement d'essaiWasserzähler - Teil 3: Prüfverfahren und -einrichtungenTa slovenski standard je istoveten z:EN 14154-3:2005+A1:2007SIST EN 14154-3:2005+A1:2007en;de91.140.60Sistemi za oskrbo z vodoWater supply systemsICS:SIST EN 14154-3:20051DGRPHãþDSLOVENSKI
STANDARDSIST EN 14154-3:2005+A1:200701-junij-2007

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 14154-3:2005+A1
April 2007 ICS 91.140.60 Supersedes EN 14154-3:2005English Version
Water meters - Part 3: Test methods and equipment
Compteurs d'eau - Partie 3: Méthodes et équipement d'essai
Wasserzähler - Teil 3: Prüfverfahren und -einrichtungen This European Standard was approved by CEN on 26 July 2004 and includes Amendment 1 approved by CEN on 6 March 2007.
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 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 Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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.
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B-1050 Brussels © 2007 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14154-3:2005+A1:2007: E

Irregularity in water velocity field.47 A.1 Irregularity in water velocity field.47 A.2 Flow disturbers.47 Annex B (informative)
Examples of methods and components used for testing Concentric Water Meters.58 Annex C (normative)
Equipment and method used to determine meter error.61 C.1 Principle.61 C.2 Description of the test rig.61 C.3 Pipe-work.61 C.3.1 Description.61

Equipment and methods for pressure loss test.66 D.1 Principle.66 D.2 Pressure loss test equipment.66 D.2.1 General.66 D.2.2 Measuring section.66 D.3 Test procedure.71 D.3.1 Determination of pressure loss attributable to pipe lengths for water meters (measurement 1)71 D.3.2 Measurement and calculation of the actual ∆∆∆∆P of a water meter (measurement 2).72 Annex E (informative)
Characteristics of reference devices.73 E.1 General.73 E.2 Types of reference devices.73 E.2.1 Calibration using volumetric vessels.73 E.2.2 Calibration using reference meters (master meters).74 E.2.3 Calibration using calibrated tubes.75 E.2.4 Calibration by weighing method.76 E.2.5 Other calibration methods.76 Annex ZA (informative)
!!!!Relationship between this European Standard and the Essential Requirements of EU Directive 22/2004/EC on Measuring Instruments.77 Bibliography.84

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+A1:2007", which can be verified by administrative work and shall show that the meter is manufactured in conformity with it.

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.
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