Room Cleanliness
The proposed site must be clean of dust. The advised dust class in ISO 8.
Class
| Maximum Particles/m3
| FED STD 209E equivalent
|
≧0.1 µm |
≧0.2 µm |
≧0.3 µm |
≧0.5 µm |
≧1 µm |
≧5 µm |
ISO 1 |
10 |
2 |
|
|
|
|
|
ISO 2 |
100 |
24 |
10 |
4 |
|
|
|
ISO 3 |
1,000 |
237 |
102 |
35 |
8 |
|
Class1 |
ISO 4 |
10,000 |
2,370 |
1,020 |
352 |
83 |
|
Class10 |
ISO 5 |
100,000 |
23,700 |
10,200 |
3,520 |
830 |
29 |
Class100 |
ISO 6 |
1,000,000 |
237,000 |
102,000 |
35,200 |
8,300 |
293 |
Class1K |
ISO 7 |
|
|
|
352,000 |
83,000 |
2,930 |
Class10K |
ISO 8 |
|
|
|
3,520,000 |
830,000 |
29,300 |
Class100K |
ISO 9 |
|
|
|
35,200,000 |
8,300,000 |
293,000 |
Room air |