These weights, except E0 class, are according to the international OIML R111 recommendation in terms of material
(roughness, magnetism, …) and shape and marking.
OIML WEIGHTS FROM 1mg to 50kg E0, E1 and E2 classes
Class E1 weights are intended to ensure traceability between national mass standards and weights of a lower accuracy class.
Class E2 weights are intended for use in the calibration of weights of a lower accuracy class and for use with weighing instruments of special accuracy class I. Class E2 weights or weight sets have to be accompanied by a calibration certificate.
OIML WEIGHTS FROM 1mg to 50kg F1 and F2 classes
These weights are according to the international OIML R111.
Weights intended for use in the calibration of weights of a lower accuracy class and for use with weighing instruments of special accuracy class I and high accuracy class II. They can also be used as control weights and are usually accompanied by a calibration certificate.
OIML WEIGHTS FROM 1mg to 50kg M1, M2 and M3 classes
These weights are according to the international OIML R111.
Weights intended for use in the calibration of weights of a lower accuracy class and for use with weighing instruments of medium accuracy class III and ordinary accuracy class IIII. They can also be used as control weights and are usually accompanied by a calibration certificate.
MASSES FROM 100 kg to 2t E, F and M classes
These masses are intended for use in the calibration of weights of a lower accuracy class and for use with weighing instruments of special accuracy class I, high accuracy class II, and medium accuracy class III. They are usually accompanied by a calibration certificate.
All these masses can be handled with slings to be fixed at the rings.
M class weights with feet have been conceived to be stackable and can be handled with a forklift truck or pallet lift.