At present, the weights of the classification according to main JJG99 - 1990 "weights", divided into two equal nine eleven grades, including first, second stages E1, E2, F1, F2, M1, M11, M2, M22 grade 0.in accordance with the level by dividing the weights:
1. - class standard gauge (weights), the first class has two stages: 1) superior to the standard of weights.The E1 standard weights, etc.The E1 grade standard weights.E2 (4) such as standard weights.(5), i.e. the E2 grade standard weights.
2. Standard gauge (weight), there is an a - class: The class standard weights.The standard weights F1, etc.The two F1 stages pass the standard weight.
3. A third standard gauge (weight), as follows: F2 standard weights, etc.The Class F2 standard weights.
4. Fourth - grade standard gauge (weights), have four levels: The M1 standard weights, etc.The M1 level standard weights.The M11 has elapsed the standard weight.The M11 grade standard weights.(5), i.e., M2, in each of the standard weight.M22 (Grade 6 standard weights.⑦ M22 and standard weights.M22 (Grade 8 standard weights.
5. A fifth measure (weight), primary anti - return: there is only one level - 0.So, they used the old rules of the ranks of the weights, the above - mentioned method may be employed.
In addition, the new regulation only standard weights (weights) and weights (work weight) stage.Fa has standard correction values, and the only working weight tolerance without the correction value.Farmar has a hierarchy: E1, E2, F1, F2, M1, M11, M2, M22, and M3, a total of 9 levels.
OIML International Organization weight specification level (allowable error) in the following table:
|
grade weight |
E1 ±mg |
E2 ±mg |
F1 ±mg |
F2 ±mg |
M1 ±mg |
M2 ±mg |
M3 ±mg |
|
1kg |
0.5 |
1.5 |
5 |
15 |
50 |
150 |
500 |
|
2kg |
1 |
3 |
10 |
30 |
100 |
300 |
1000 |
|
5kg |
2.5 |
7.5 |
25 |
75 |
250 |
750 |
2500 |
|
10kg |
5 |
15 |
50 |
150 |
500 |
1500 |
5000 |
|
50kg |
25 |
75 |
250 |
750 |
2500 |
7500 |
25000 |
like with the level of difference or the like is not determined in accordance with the degree of separation, i.e., Fa and the like each having a code value;Class is in accordance with the indication error is to free of, i.e. grade poise due to no correction value, as long as the indication error in this range are considered qualified.
