We have Weights with Tracked and Accredited RBC Certificates

AAD Scales and Engineeringthrough Inmetro, provides information on an overview and classification of standard weights, their correct use in weighing instruments.

Reference documents

• INMETRO Ordinance No. 233 of 1994

• OIML R111 - Weights of classes E1, E2, F1, F2, M1, M1–2, M2, M2–3 and M3.

Classification of Standard Weights

      The weights are classified based on INMETRO Ordinance No. 233, of December 22 of 1994, which approves the       _cc781905-5cde-3194-bb3b-136bad 5cf58d_ Metrological Technical Regulation, considering the International Regulation R 111 (94) OIML .

      The weights are divided into 7 (seven) classes.

                E1 E2 F1 F2 M1 M2 M3     _cc781905-5cde -3194-bb3b-136bad5cf58d_    

      _cc781905-5cde-3194-bb3b-136bad 5cf58d_Highest accuracy ---> Lowest accuracy

Criteria Used

1. The shape

2. the constructive aspect

3. The material used

4. The specific mass

5. The condition of the surface (Roughness)

6. The type of adjustment

7. The markup used

8. The maximum errors allowed (The complete table is available in Ordinance INMETRO 233 of 1994)

Classe de Accuracy

Class E1 and E2:

      Solid stainless steel weights, without marking on their surface and without adjustment chamber.

Class F1:

      Stainless steel weights with adjustment chamber made of the same material, allow marking of the nominal value on its surface.

Class F2:

_CC781905-5CDE-3194-BB3B-136BAD5CF58D_ _CC781905-5CDE-3194-BB3B-136BAD5CF58D_ _CC781905-5CDE-3194-BB3B36BAD5CF58D_ BLANCH FASTS WITH A CHROME COATING. indication of the nominal value on its surface, followed by the letter F.

Class M1:

      Weights in stainless steel, brass or cast iron (with good paint quality). They must bear the indication of the nominal value on their surface, followed by the M1 or M symbol.

Class M2:

      They must carry the M2 symbol, in high or low relief, or no indication at all class. The material must have hardness and corrosion resistance at least equal to that of cast brass and brittleness not exceed that of gray cast iron.

Class M3:

      The material must have hardness and corrosion resistance at least equal to cast brass and the brittleness does not exceed that of cast brass. gray cast iron. Class M3 weights must bear the M3 or X symbol, in raised or lower relief, together with the indication of the nominal value.