OIML Recommendation R 111:1994

Weights of classes E₁, E₂, F₁, F₂, M₁, M_1-2, M₂, M_2-3 and M₃

Scope: This Recommendation contains the principal physical characteristics and metrological requirements for weights which are used: 1) for the verification of weighing instruments; 2) for the verification of weights of a lower class of accuracy; 3) with weighing instruments.