MP Filtri ICM, Руководство пользователя

Страница: 77 / 82

Appendix G
New ISO Medium Test Dust and its effect on ISO . . . 77
Correlation
The table shows the correla-
tion between Particle Sizes Ob-
tained using ACFTD (ISO 4402:1991)
and NIST (ISO 11171) Cali-
bration Methods
This table is only a guideline.
The exact relationship between
ACFTD sizes and the NIST
sizes may vary from instrument
to instrument depending on the
characteristics of the particle
counter and original ACFTD
calibration.
Particle Size Obtained Using
ACFTD
(ISO
4402:1991)
ISO/NIST
MTD
(ISO 11171)
µm µm(c)
1 4.2
2 4.6
3 5.1
4 5.8
5 6.4
6 7.1
7 7.7
8 8.4
9 9.1
10 9.8
11 10.6
12 11.3
13 12.1
14 12.9
15 13.6
16 14.4
17 15.2
18 15.9
19 16.7
20 17.5
21 18.2
22 19.0
23 19.7
24 20.5
25 21.2
26 22.0
27 22.7
28 23.5
29 24.2
30 24.9
31 25.7
32 26.4
33 27.1
34 27.9
35 28.5
36 29.2
37 29.9
38 30.5
39 31.1
40 31.7
Other Standards
Although the ISO 4406:1999 standard is being used extensively within the hydraulics
industry other standards are occasionally required and a comparison may be requested.
The following table gives a very general comparison but often no direct comparison is