OIML Recommendation R 47:1979

Standard weights for testing of high capacity weighing machines

Scope: This Recommendation applies to standard weights having a nominal value equal to or greater than 50 kg, used for testing (and adjusting, where appropriate) of high capacity weighing machines in  accuracy classes III (medium) and IIII (ordinary), which are defined in International Recommendation n° 3: "Metrological regulations for non-automatic weighing machines".