| Classification
and maximal permissible errors |
 |
 |
| |
| CLASSIFICATION OF WEIGHING INSTRUMENTS |
| Class: |
Verifying unit
[e] |
Quantity of verifying units
[n=Max/e] |
Minimal load
[Min]* |
| Minimal | Maximal |
Lower threshold |
| Special |
 | 0,001
g  e ** |
50.000 |
|
100 e |
| High |
 | 0,001
g e
0,005 |
100 |
100.000 |
20 e |
| 0,1 g
e |
5.000 |
100.000 |
50 e |
| Average |
 | 0,1
g e
2 g | 100 | 10.000 |
20 e |
| 5 g
e |
500 |
10.000 |
20 e |
Normal
|  | 5
g e |
100 |
1.000 |
10
e | |
* minimal load is reduced
to 5e for instruments In classes II and III and settling fees according
to sending tariffs.
** because of uncertainty of standard
masses the checking of balance with unit e < 1 mg is not performed normally. |
| |
| MAXIMAL PERMISSIBLE ERRORS FOR FIRST
VERIFICATION OF WEIGHING INSTRUMENTS |
| Maximal Permissible Errors
at First Verification : |
For loads [m] In verifying
units [e] |
| Class | Class
| Class
| Class
|
| ± 0,5 e |
0
m 50.000 |
0
m
5.000 |
0
m 500 |
0
m 50 |
| ± 1 e |
50.000 < m
200.000 |
5.000 < m
20.000 |
500 < m
2.000 |
50 < m
200 |
| ± 1,5 e |
200.000 < m |
20.000 < m
100.000 |
2.000 < m
10.000 |
200 < m
1.000 |
|
| Maximal errors for instruments in
usage are two times higher from errors acceptable for first verification. |
| |
