SN EN 12405-1 : 2005 + A2 2011

Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
   3.1 Terms and definitions
   3.2 Symbols
4 Principle of measurement
   4.1 Conversion as a function of temperature
   4.2 Conversion as a function of pressure and temperature
   4.3 Conversion as a function of pressure, temperature and
        deviation from the ideal gas law
   4.4 Correction of the volume at measurement conditions
5 Rated operating conditions
   5.1 Specified field of measurement
   5.2 Environmental class
   5.3 Power supply
6 Construction requirements
   6.1 General
   6.2 Casings
   6.3 Indications
   6.4 Inputs for volume conversion
   6.5 Battery powered conversion device
   6.6 Security devices and alarms
7 Installation requirements
   7.1 General
   7.2 Temperature transducer
   7.3 Pressure transducer
8 Performance
   8.1 Reference conditions
   8.2 Rated operating conditions
   8.3 Maximum permissible errors
   8.4 Conditions of matching the constituent elements of a
        conversion device type 2
   8.5 Influence factors
   8.6 Disturbances
   8.7 Durability
9 Tests of conformity
   9.1 Verification of the construction requirements
   9.2 Verification of the performance requirements
   9.3 Test report
10 Marking
Annex A (normative) Type test
                    A.1 General conditions
                    A.2 Accuracy tests under reference conditions
                    A.3 Effect of ambient temperature
                    A.4 Effect of damp heat, steady state test
                    A.5 Effect of damp heat, cyclic test
                    A.6 Electrical power variation
                    A.7 Short time power reductions
                    A.8 Electrical bursts
                    A.9 Electromagnetic susceptibility
                    A.10 Electrostatic discharges
                    A.11 Overload of pressure (only for type 1 and
                         pressure transducers)
                    A.12 Effect of vibrations
                    A.13 Effect of shocks
                    A.14 Overload of pressure (mechanical)
                    A.15 Durability
                    A.16 Alarms operation
Annex B (normative) Pressure transducers
                    B.1 Scope
                    B.2 Rated operating conditions
                    B.3 Construction requirements
                    B.4 Performances
                    B.5 Tests of conformity
                    B.6 Marking
Annex C (normative) Platinum resistance thermometer sensors
                    C.1 Scope
                    C.2 Operating rated conditions
                    C.3 Construction requirements
                    C.4 Performances
                    C.5 Marking
                    C.6 Metrological verifications
                    C.7 Verification procedure
Annex D (normative) Temperature transducers
                    D.1 Scope
                    D.2 Rated operating conditions
                    D.3 Construction requirements
                    D.4 Performances
                    D.5 Tests of conformity
                    D.6 Marking
Annex E (informative) Model type test report for conversion devices
                      E.1 General
                      E.2 Accuracy tests under reference conditions
                      E.3 Ambient temperature
                      E.4 Effect of damp heat, steady state test
                      E.5 Effect of damp heat, cyclic test
                      E.6 Electrical power variation
                      E.7 Short time power reductions
                      E.8 Electrical bursts
                      E.9 Electromagnetic immunity
                      E.10 Electrostatic discharges
                      E.11 Effect of an overload of static pressure
                      E.12 Effect of vibrations
                      E.13 Effect of shocks
                      E.14 Mechanical resistance to overload of
                           static pressure
                      E.15 Durability
Annex F (informative) Model type test report for associated
                      transducers
                      F.1 General
                      F.2 Accuracy tests under reference conditions
                      F.3 Ambient temperature
                      F.4 Effect of damp heat, steady state test
                      F.5 Effect of damp heat, cyclic test
                      F.6 Electrical power variation
                      F.7 Short time power reductions
                      F.8 Electrical bursts
                      F.9 Electromagnetic immunity
                      F.10 Electrostatic discharges
                      F.11 Effect of an overload of static pressure
                      F.12 Effect of vibrations
                      F.13 Effect of shocks
                      F.14 Mechanical resistance to overload of
                           static pressure
                      F.15 Durability
Bibliography

Describes the requirements and tests for the construction, performance, safety and conformity of gas-volume electronic conversion devices associated to gas meters, used to measure volumes of fuel gases of the 1st and 2nd families according to EN 437.