EN ISO 4064-2:2017

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Reference conditions
5 Symbols, units and equations
6 External examination
7 Performance tests for all water meters
8 Performance tests related to influence
   factors and disturbances
9 Test program for type evaluation
10 Tests for initial verification
11 Presentation of results
Annex A (normative) - Type examination and testing
        of checking facilities of electronic devices
Annex B (normative) - Calculating the relative error
        (of indication) of a water meter
Annex C (normative) - Installation requirements for flow
        disturbance tests
Annex D (normative) - Type evaluation of a family of
        water meters
Annex E (informative) - Examples of methods and
        components used for testing concentric Water meters
Annex F (informative) - Determining the density of water
Annex G (informative) - Maximum uncertainties in the
        measurement of influence factors and disturbances
Annex H (informative) - Pressure loss test pressure tappings,
        hole and slot details
Annex I (normative) - Flow disturbers
Bibliography
Annex ZA (informative) - Relationship between this
         European Standard and the essential requirements
         of Directive 2014/32/EU aimed to be covered

ISO 4064-2:2014|OIML R 49-2:2013 is applicable to the type evaluation and initial verification testing of water meters for cold potable water and hot water as defined in ISO 4064‑1:2014|OIML R 49‑1:2013. OIML Certificates of Conformity can be issued for water meters under the scope of the OIML Certificate System, provided that ISO 4064-2:2014|OIML R 49-2:2013, ISO 4064‑1:2014|OIML R 49‑1:2013 and ISO 4064‑3:2014|OIML R 49‑3:2013 are used in accordance with the rules of the system.ISO 4064-2:2014|OIML R 49-2:2013 sets out details of the test programme, principles, equipment and procedures to be used for the type evaluation, and initial verification of a meter type.The provisions of ISO 4064-2:2014|OIML R 49-2:2013 also apply to ancillary devices, if required by national regulations.The provisions include requirements for testing the complete water meter and for testing the measurement transducer (including the flow or volume sensor) and the calculator (including the indicating device) of a water meter as separate units.