|
ISO 4406 - Standard for Particle Counting
in Oil
|
Number of Particles per ml
|
ISO Code
|
| More Than |
Up to & Including |
80,000
40,000
20,000
10,000
5,000
2,500
1,300
640
320
160
80
40
20
10
5
2.5
1.3
0.64
0.32
0.16
0.08
0.04
0.02
0.01
0.005
0.0025 |
160,000
80,000
40,000
20,000
10,000
5,000
2,500
1,300
640
320
160
80
40
20
10
5
2.5
1.3
0.64
0.32
0.16
0.08
0.04
0.02
0.01
0.005 |
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
00 |
The ISO 4406 code specifies either two or
three size ranges for particles. Either one looks at 5 and 15
micron particles or 2, 5 and 15 micron particles. The ISO code number
refers to the number of particles per 1 ml of oil in larger than each
size range. The ISO Code is written with a backslash between the
numbers (e.g. 14/12/7), with the >5 (or >2) micron scale number
first.
See the
Examples Below:
|
2 Code
Particle Count (5 and 15 micron)
| Size |
Count |
Scale |
| >5 |
3620 |
19 |
| >15 |
28 |
12 |
ISO Code =
19/12
|
3 Code
Particle Count (2, 5 and 15 micron)
| Size |
Count |
Scale |
| >2 |
11893 |
21 |
| >5 |
3620 |
19 |
| >15 |
28 |
12 |
ISO Code = 21/19/12
|
|
