NEN EN 1434-4 : 2015

Foreword
1 Scope
2 Normative references
3 General
4 Requirements
5 Specification of operating conditions
    5.1 Rated operating conditions
    5.2 Reference conditions
    5.3 Reference values for the measurand, RVM
          5.3.1 Reference values for the measurand
                  RVM for qp><-3,5 m3/h
          5.3.2 Reference values for the measurand
                  RVM for qp>3,5m3/h
6 Tests and measurements
    6.1 General
    6.2 Test programme
    6.3 Uncertainty of test equipment
    6.4 Performance test
          6.4.1 Flow sensor
          6.4.2 Calculator
          6.4.3 Temperature sensors
          6.4.4 Combined sub-assemblies or complete meter
    6.5 Dry heat
          6.5.1 Calculator
          6.5.2 Flow sensor
          6.5.3 Combined sub-assemblies or complete meter
    6.6 Cold
          6.6.1 Calculator
          6.6.2 Flow sensor
          6.6.3 Combined sub-assemblies or complete meter
    6.7 Static deviations in supply voltage
    6.8 Durability test
          6.8.1 Flow sensor
          6.8.2 Temperature sensors
          6.8.3 Combined sub-assemblies or complete meter
    6.9 Damp heat cyclic
    6.10 Short time mains voltage reduction
    6.11 Electrical transients
          6.11.1 Fast transients (bursts)
          6.11.2 Surge transients
    6.12 Electromagnetic field
    6.13 Electrostatic discharge
    6.14 Static magnetic field (fraud protection)
    6.15 Electromagnetic field at mains frequency
    6.16 Internal pressure
    6.17 Pressure loss
    6.18 Electromagnetic emission
          6.18.1 Conducted emission on power a.c. lines
          6.18.2 Conducted emission on signal and d.c.
                  power lines
          6.18.3 Radiated emission
7 Documentation

Defines pattern approval tests for heat meters. Heat meters are instruments intended for measuring the energy which in a heat-exchange circuit is absorbed (cooling) or given up (heating) by a liquid called the heat-conveying liquid.