Grading standard of weights

1. There are 9 grades of weights: E1, E2, F1, F2, M1, M11, M2, M22 and M3

The difference between grade and grade lies in:

The equal weight is divided according to the uncertainty, that is, the equal weight has a correction value,

The grade is divided according to the indication error, that is, the grade weight has no correction value. As long as the indication error is within this range, it is considered qualified

2. Others:

Balance weight: material type - non-magnetic stainless steel Non magnetic stainless steel, copper chromium plating, iron chromium plating.

Weight shape - circular cylinder, circular cone, plate shape, sheet shape, ring (ring) shape, riding shape and strip (rod) shape

Combination form - conventional combination 5, 2, 2, 1, (can be combined arbitrarily according to user requirements)

Accuracy class - first class (E2) Second class (F1 real difference) F1 (Level 3 tolerance) F2 (Level 4) M1 (Level 5) M2 (Level 6)

Complete specifications (mass range): 20kg ~ 10kg, 10kg ~ 1kg, 5kg ~ 1kg, 2kg ~ 1kg, 2kg ~ 1mg, 1kg ~ 1mg, 500g ~ 1mg, 200g ~ 1mg, 100g ~ 1mg, 500mg ~ 1mg (chip code), 500mg ~ 10mg (circle code), 50mg ~ 1mg (circle code)

Single specification (nominal value): 20kg, 10kg, 5kg, 2kg, 1kg, 500g, 200g, 100g, 50g, 20g, 10g, 5g, 2G, 1g, 500mg, 200mg, 100mg, 50mg, 20mg, 10mg, 5mg, 2mg, 1mg

3、

At present, the grading of weights is mainly divided into two grades and nine grades according to the provisions of jjg99-1990 weights, including grade I, grade II, grade E1, grade E2, grade F1, grade F2, grade M1, grade M11, grade m2 and grade M22

And level 0.

If we take into account the previous recognition of equivalent weights, we can also divide weights according to grade.

1. First class standard measuring tools (weights)

1) First class standard weight.

2) E1 and other standard weights.

3) E1 standard weight.

4) E2 and other standard weights.

5) E2 standard weight.

2. Second class standard measuring tools (weights)

1) Second class standard weight.

2) F1 and other standard weights.

3) Class F1 standard weight.

3. Third class standard measuring tools (weights)

1) F2 and other standard weights.

2) Class F2 standard weight.

4. Fourth class standard measuring tools (weights)

1) M1 and other standard weights.

2) M1 standard weight.

3) M11 and other standard weights.

4) M11 standard weight.

5) M2 and other standard weights.

6) M22 standard weight.

7) M22 and other standard weights.

8) M22 standard weight.

5. Fifth class measuring tools (weights)

There is only one class 0 weight.

Therefore, when we are used to the fifth class weight in the old regulations, we can use the above method to distinguish.

In addition, the new regulations can only be divided into standard weight (equal weight) and working weight (grade weight). The standard weight has a correction value, while the working weight has only a tolerance but no correction value.