Overview Of Modifications - Iso4406:1987 <-> Iso4406:1999 - HYDAC FILTER SYSTEMS ContaminationSensor CS 1939 Series Operating And Maintenance Instructions Manual

Note: increasing the measurement reference by 1 causes the particle count
to double.
Example:
Cleanliness class
Overview of modifications - ISO4406:1987 <-> ISO4406:1999
Size ranges
Dimension
determined
Test dust
Comparable size
ranges
ContaminationSensor CS 1939
BeWa CS1939 3978342c V100 en-us 2019-10-08.docx
ISO Code 18 / 15 / 11 says:
Particle count / ml
18
15
11
"old" ISO 4406:1987
> 5 µm
> 15 µm
Longest dimension of
a particle
ACFTD - dust
Old ACFTD calibration Comparable
-----
5 µm
15 µm
1,300 – 2,500
160 – 320
10 – 20
"new" ISO 4406:1999
1-10 µm ultra
fine fraction
SAE Fine,
AC – Fine
SAE 5-80 µm
ISO MTD
Calibration dust
for particle
counters
SAE Coarse
Coarse fraction
ACFTD dusts
< 1 µm
4.3 µm
15.5 µm
en
Glossary
Size ranges
> 4 µm
(c)
> 6 µm
(c)
> 14 µm
(c)
> 4 µm
(c)
> 6 µm
(c)
> 14 µm
(c)
Diameter of the
coextensive circle
ISO 11171:1999
ISO 12103-1A1
ISO 12103-1A2
ISO 12103-1A3
ISO 12103-1A4
New Nist calibration
4 µm
(c)
6 µm
(c)
14 µm
(c)
Page 42 / 48
2019-10-08