The International Organization of Legal Metrology (OIML) is a worldwide, intergovernmental organization whose primary aim is to harmonize the regulations and metrological controls applied by the national metrological services, or related organizations, of its Member States.
The two main categories of OIML publications are:
• International Recommendations (OIML R), which are model regulations that establish the metrological charac- teristics required of certain measuring instruments and which specify methods and equipment for checking their conformity; the OIML Member States shall implement these Recommendations to the greatest possible extent;
• International Documents (OIML D), which are inform- ative in nature and intended to improve the work of the metrology services.
OIML Draft Recommendations and Documents are devel- oped by technical committees or subcommittees which are formed by Member States. Certain international and regional institutions also participate on a consultation basis.
Cooperative agreements are established between OIML and certain institutions, such as ISO and IEC, with the objective of avoiding contradictory requirements; consequently, manu- facturers and users of measuring instruments, test labor- atories, etc. may apply simultaneously OIML publications and those of other institutions. International Recommendations and International Docu- ments are published in French (F) and English (E) and are subject to periodic revision. This publication - OIML R 111-1, Edition 2004 (E) - was developed by TC 9/SC 3 Weights. It was directly sanctioned by the International Conference of Legal Metrology in 2004.
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