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2. Weighing measurement systems
2.1 Relationship between mass and level
It seems easy to place a tank or silo on a scale or weighbridge to obtain a level measurement.
The mass measurement results from the integration of the product of height and density, and therefore corresponds to a head measurement for liquids, with the form factor or barometric effect carefully taken into account. In the case of bulk solids whose apparent density is highly variable in space and time (due to hygrometry, settling, vaulting, etc.), the relationship between level and mass becomes suspect and is only possible for free-flowing products.
More often than not, the parameter sought is actually the weight, mass or, possibly, the volume of the product, and the operator is only interested...
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Bibliography
Websites
Online course on level measurement using radar technology :
https://academy-online.krohne.com/elearning/fr/cours/mesure-de-niveau-radar/
Engineer's Garage: level sensors :
...Standards and norms
- Radiation protection – Sealed radioactive sources – General requirements and classification - ISO 2919 - 2012
- Tanks for transporting hazardous materials – Tank service equipment – Fill limiters for liquid petroleum fuels - NF EN 13922 - 2011
The catalog of Iso and Afnor standards can be consulted online on the Afnor website: http://www.afnor.fr
...Regulations
Arrêté du 8 juillet 2003 relatif au contrôle métrologique des récipients-mesures. NOR : INDI0301736A
Decision no. 09.00.110.003.1 of October 21, 2009 relating to calibration resources in the field of static and dynamic liquid measurement.
Arrêté du 24 mars 2009 relatif aux jaugeurs. NOR : ECEI0906617A
Decree no. 2002-460 of April 4, 2002 on the general...
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European Committee for Electrotechnical Standardization (CENELEC): https://www.cenelec.eu
Institut national de l'environnement industriel et des risques (INERIS): https://www.ineris.fr...
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