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3
2000
356
64
11
2
4
4000
712
128
22
4
5
8000
1425
253
45
8
6
16000
2850
506
90
16
7
32000
5700
1012
180
32
8
64000 11400
2025
360
64
9
12800
0
22800
4050
720
128
10
25600
0
45600
8100
1440
256
11
51200
0
91200 16200
2880
512
12
10240
00
18240
0
32400
5760
1024
13
20480
00
36480
0
64800 11520
2048
14
40960
00
72900
0
12960
0
23040
4096
SHEET 2
Standard table of ISO 4406 contamination class
(Unit: particle quantity/100ml)
Particle quantity per
100ml
Class
code
particle
quantity/100ml
Class
code
Larger
than
Upper
limit
value
Larger
than
Upper
limit
value
1300000
00
2500000
00
28
4000
8000
13
6400000
0
1300000
00
27
2000
4000
12
3200000
0
6400000
0
26
1000
2000
11
1600000
0
3200000
0
25
500
1000
10
8000000
1600000
0
24
250
500
9
4000000
8000000
23
130
250
8
2000000
4000000
22
64
130
7
1000000
2000000
21
32
64
6
500000
1000000
20
16
32
5
250000
500000
19
8
16
4