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2. Checking meters at atmospheric pressure and in dry air
French regulations currently only require verification of meters of certain types: diaphragm meters (or meters with deformable walls), rotary piston meters, turbine meters (or speed meters) and ultrasonic meters, as well as any meter involved in financial transactions.
The regulations stipulate that meters must be tested in air at atmospheric pressure. The frequency of verification is set by the decree of October 21, 2010 (consolidated on November 16, 2016) on fuel gas meters (article 21 and appendix 3).
We will only describe the main methods that can be used in this case.
A distinction must be made between the verification of diaphragm meters and the verification of rotary piston meters, turbine meters or ultrasonic meters, known as "industrial meters".
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Checking meters at atmospheric pressure and in dry air
Venturi-tuyères operating in sonic regime
Bibliography
Websites
French metrology :
http://www.metrologie-francaise.fr/fr/organisation/laboratoires-associes.asp
Bureau International des Poids et Mesures (BIPM) :
International...
Events
The European Flow Measurement Workshop is held in Europe in partnership with CEESI (USA) every year: http://www.efmws.eu/
The North Sea Flow Measurement Workshop takes place every year between Norway and Scotland.
Standards and norms
- Mesure de débit de gaz au moyen de Venturi-tuyères en régime critique. - NF EN ISO 9300 - 2005
- Compteurs de volume de gaz à parois déformables. - NF EN 1359 - 1999
- Mesure de débit des fluides au moyen d'appareils déprimogènes insérés dans des conduites en charge de section circulaire. - NF EN ISO 5167 - 2003
- Compteurs de gaz à turbine. - NF EN 12261 - 2002
- Compteurs de gaz à déplacement...
Regulations
Decree no. 72-866 of September 6, 1972 regulating the category of measuring instruments: gas volume meters. Consolidated version as of May 17, 2017.
Arrêté du 21 octobre 2010 relatif aux compteurs de gaz combustible (NOR : ECEI1025327A). Version consolidée au 21 septembre 2017.
Arrêté du 2 novembre 2016 relatif aux instruments de mesure (NOR: ECFI1628264A). Consolidated version...
Directory
Manufacturers with a calibration bench for gas meters:
ELSTER-INSTROMET (Honeywell), Lognes :
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