NEN EN 14154-1 : 2005 + A2 2011

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Technical characteristics
  4.1 Meter size and overall dimensions
      4.1.1 Meter size
      4.1.2 Dimensions of in-line meters
      4.1.3 Dimensions of concentric meters
  4.2 Meter and connections
      4.2.1 Connections interfaces
      4.2.2 Threaded and connections
      4.2.3 Flanged connections
      4.2.4 Connection for bolting in between flanges
      4.2.5 Dimensions for manifold(s) for concentric meters
  4.3 Indicating device
      4.3.1 General requirements
      4.3.2 Types of indicating device
      4.3.3 Verification devices - First element -
            Verification scale interval
  4.4 Water meters which utilise electronic devices
      4.4.1 Checking facilities
      4.4.2 Power supply
      4.4.3 Correction device
      4.4.4 Calculator
      4.4.5 Ancillary device
  4.5 Materials and construction
  4.6 Protection against solid particles
  4.7 Reverse flow
  4.8 Meter security and protection against fraud
      4.8.1 Mechanical protection devices
      4.8.2 Electronic sealing devices
5 Meter classification
  5.1 Meter pressure classes
      5.1.1 Admissible water pressure
      5.1.2 Internal pressure
      5.1.3 Concentric meters
  5.2 Meter temperature classes
  5.3 Flow profile sensitivity classes
  5.4 Pressure loss
6 Marking
7 Metrological characteristics
  7.1 Permanent flowrate (Q[3])
  7.2 Measuring range
  7.3 Relationship between permanent flowrate (Q[3]) and
      overload flowrate (Q[4])
  7.4 The relationship between transitional flowrate (Q[2])
      and minimum flowrate (Q[1])
  7.5 Reference flowrate
  7.6 Maximum permissible error
      7.6.1 Sign of the error
      7.6.2 Relative error, epsilon
      7.6.3 MPE lower flow range
      7.6.4 MPE upper flow range
      7.6.5 Maximum permissible errors in service
      7.6.6 Absence of flow
  7.7 Meters with subassemblies
8 Meter performance requirements
  8.1 Measurement error tests
  8.2 Pressure tests
  8.3 Pressure loss tests
  8.4 Overload temperature tests
  8.5 Climatic and mechanical environment
  8.6 Electromagnetic environment
  8.7 Static magnetic field
  8.8 Endurance
9 Metrological control
  9.1 Pattern approval
      9.1.1 Extent of pattern approval
      9.1.2 Objective of pattern approval
      9.1.3 Number of meters to be tested
      9.1.4 Test verdict
  9.2 Initial verification
      9.2.1 General
      9.2.2 Static pressure test
      9.2.3 Error (of indication) measurements
      9.2.4 Water temperature of tests
Annex A (normative) Checking facilities
  A.1 Action of checking facilities
  A.2 Checking facilities for the measurement transducer
      A.2.1 Pulse input solutions
      A.2.2 Other technologies
  A.3 Checking facilities for the calculator
      A.3.1 Checking of correct functioning
      A.3.2 Checking of the validity of calculations
  A.4 Checking facility for the indicating device
      A.4.1 First possibility
      A.4.2 Second possibility
  A.5 Checking facilities for ancillary devices
  A.6 Checking facilities for the associated measuring
      instruments
Annex B (normative) In-line meter dimensions (including
                      alternative lengths)
Annex C (informative) Table of rated operating, limiting and
                      references conditions
Annex D (informative) Test program
Bibliography

Pertains to water meters intended for residential, commercial, light industrial and industrial use, and specifies the requirements and certification procedures for water meters, irrespective of the design technologies used to meter the actual volume of clean cold potable water or heated water, flowing through a fully charged, closed conduit.