NBN EN 12261 : 2002 AMD 1 2006
Current
The latest, up-to-date edition.
1 Scope
2 Normative references
3 Terms, definitions and symbols
3.1 Terms and definitions
3.2 Symbols
4 Meter classification
4.1 Flange pressure ratings
4.2 Gas meter sizes, rangeability and connection diameter sizes
4.3 Connections and dimensions
4.4 Temperature ranges
5 Metrological performance requirements
5.1 General
5.2 Type testing
6 Design and material requirements
6.1 General
6.2 Robustness
6.3 Resistance to environmental conditions
6.4 Removable meter mechanisms
6.5 Indicating devices and accessories
6.6 Pressure and temperature tappings
6.7 Lubrication
7 Meter output
7.1 General
7.2 Indicating device
7.3 Pulse generator
7.4 Output shaft
7.5 Test element
8 Marking
8.1 General
8.2 Data plate
8.3 Direction of flow
8.4 Working position
8.5 Other connections
Annex A (normative) Test facility specifications
Annex B (normative) Perturbation testing
Annex C (informative) Recommendations for use
Annex D (normative) Individual factory testing
Annex E (normative) Metrological requirements and tests for
each meter prior to dispatch (Individual meter testing)
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