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Technical Cleanliness Inspection System

OLYMPUS CIX SeriesExplanation of Standards

Explanation of the International Standards for Technical Cleanliness

Most of the processing steps for cleanliness inspection are defined in company-specific and international standards.

The definition of each standard varies according to the application. The international cleanliness standards specify the

methods to be used for evaluating (extracting, analyzing, and reporting) the cleanliness of component parts.

Standards describe not only the evaluation of the filter membranes, but also how they should be prepared. The

following standards are pre-defined in the CIX system:

Standard Mainly used for Last revision

ISO 4406 Fluid used in hydraulic systems 1999

ISO 4407 Hydraulic fluid systems 1991

ISO 11218 Hydraulic fluids 1993

ISO 12345 Fuel injection equipment 2013

ISO 14952 Launch vehicles 2003

ISO 16232 (A) Fluid circuits of motor vehicles 2007

ISO 16232 (N) Fluid circuits of motor vehicles 2007

ISO 16232 (V) Fluid circuits of motor vehicles 2007

NAS 1638 Hydraulic fluids 1964

NF ISO 21018 Fluid used in hydraulic systems 2008

NF E 48-651 Hydraulic fluids 1986

NF E 48-655 Hydraulic fluids 1989

SAE A S4059 Hydraulic fluids in aerospace 2011

VDA 19.1 (A) Fluid circuits in automotive 2015

VDA 19.1 (N) Fluid circuits in automotive 2015

VDA 19.1 (V) Fluid circuits in automotive 2015

Cleanliness Standards

1

Explanation of Standards

Specifics• This standard refers to 1 ml of filtered fluid.

• The results are based on cumulative counts.

This international standard specifies the code to be used in defining the quantity of solid particles in the fluid used in a

given hydraulic fluid power system.

Particle Size ClassificationThe maximum Feret diameter (x) is measured for each particle. All particles are classified into the following cumulative

bins:

The absolute number of particles is counted for each class

Scaling and NormalizationThis absolute number of particles can be scaled if the area of the filter that is scanned differs from the flow-through

area on the filter. The final counting result must be normalized to 1 ml of hydraulic fluid.

Contamination LevelsThe contamination level of each class is defined as:

Cleanliness CodeThe contamination levels of the two particle classes are shown. In order to relate counts obtained with an automatic

particle counter, the code shall be stated in three part form with the first part given as “-“

Example: -/19/14

Particle class name Feret diameter of particle

B x ≥ 5 µmC x ≥ 15 µm

Contamination level Particles in 1 ml fluid

0 0 < n ≤ 0,011 0,01 < n ≤ 0,02

2 0,02 < n ≤ 0,04

3 0,04 < n ≤ 0,08

4 0,08 < n ≤ 0,16

5 0,16 < n ≤ 0,32

6 0,32 < n ≤ 0,64

7 0,64 < n ≤ 1,3

8 1,3 < n ≤ 2,5

9 2,5 < n ≤ 5

10 5 < n ≤ 10

11 10 < n ≤ 20

12 20 < n ≤ 40

13 40 < n ≤ 80

14 80 < n ≤ 160


15 160 < n ≤ 32016 320 < n ≤ 640

17 640 < n ≤ 1,300

18 1,300 < n ≤ 2,500

19 2,500 < n ≤ 5,000

20 5,000 < n ≤ 10,000

21 10,000 < n ≤ 20,000

22 20,000 < n ≤ 40,000

23 40,000 < n ≤ 80,000

24 80,000 < n ≤ 160,000

25 160,000 < n ≤ 320,000

26 320,000 < n ≤ 640,000

27 640,000 < n ≤ 1,300,000

28 1,300,000 < n ≤ 2,500,000

>28 n ≥ 2,500,000

Standard: ISO 4406:1999

2

This international standard defines methods of determining the solid particle contamination of hydraulic fluids used in

hydraulic fluid power systems.

Particle Size ClassificationThe maximum Feret diameter (x) is measured for each particle. All particles are classified into the following differential

bins:



area on the filter. The final counting result must be normalized to 100 ml of hydraulic fluid.

Contamination LevelsThere is no definition of contamination levels.

Cleanliness CodeThere is no definition of a resulting cleanliness code.


B 5 µm ≤ x < 15 µmC 15 µm ≤ x < 25 µm

D 25 µm ≤ x < 50 µm

E 50 µm ≤ x < 100 µm

F x ≥ 100 µm


3

This international standard specifies a cleanliness classification for hydraulic fluids in airplanes, helicopters and space

vehicles. Requirements for this standard are specified in SAE AS4059A.


bins:


Scaling and NormalizationThis absolute number of particles can be scaled if the area of the filter that is scanned differs from the flow-through area

on the filter. The final counting result must be normalized to 100 ml of hydraulic fluid.

Contamination LevelsThe contamination level is defined by the maximum particle number for each class as:

Cleanliness CodeThe result is the largest contamination level of all particle classes. It is written with the name “AS4059” of the

cleanliness standard and the maximum contamination class and level.

Example: AS4059 Class 11F


B 5 µm ≤ x < 15 µmC 15 µm ≤ x < 25 µm

D 25 µm ≤ x < 50 µm

E 50 µm ≤ x < 100 µm

F x ≥ 100 µm


Class B Class C Class D Class E Class F

00 125 22 4 1 00 250 44 8 2

1 500 88 16 3 1

2 1,000 178 32 6

3 2,000 356 63 11 2

4 4,000 712 126 22 4

5 8,000 1,425 253 45 8

6 16,000 2,850 506 90 16

7 32,000 5,700 1,012 180 32

8 64,000 11,400 2,025 360 64

9 128,000 22,800 4,050 720 128

10 256,000 45,600 8,100 1,440 256

11 512,000 91,200 16,200 2,880 512

12 1,024,000 182,400 32,400 5,720 1,024



4

This international standard is concerned with the assessment of the cleanliness of the fuel injection equipment as

originally supplied to the engine manufacturer.


bins:



area on the filter.


Cleanliness CodeThe combination of particle class and number of particles results in a cleanliness code.

Example: B52171/C11072/D5412/E1199/F181/G50/H47/I2/J2/K0


B 5 µm ≤ x < 15 µmC 15 µm ≤ x < 25 µm

D 25 µm ≤ x < 50 µm

E 50 µm ≤ x < 100 µm

F 100 µm ≤ x < 150 µm

G 150 µm ≤ x < 200 µm

H 200 µm ≤ x < 400 µm

I 400 µm ≤ x < 600 µm

J 600 µm ≤ x < 1,000 µm

K x ≥ 1,000 µm


5

This international standard defines analytical methods to verify the cleanliness level for parts and components used in

space fluid systems. It can be used to determine the cleanliness level of precision-cleaned parts and components used

in ground support equipment, launch vehicles and spacecraft. Requirements for this standard are specified in ISO

5884.


bins:


Scaling and NormalizationThis absolute number of particles can be scaled if the scanned filter area differs from the flow-through area on the

filter. The final counting result must be normalized to a wetted surface area of 1000 cm².




B 5 µm ≤ x < 15 µmC 15 µm ≤ x < 25 µm

D 25 µm ≤ x < 50 µm

E 50 µm ≤ x < 100 µm

F x ≥ 100 µm



6

This international standard defines the rules and the forms of expression and presentation of the results of

measurements of particulate cleanliness of components for the fluid circuits of motor vehicles. It also defines the levels

of contamination of these components. This standard refers to 1000 cm² of wetted surface of the component.


bins:


Scaling and NormalizationThis absolute number of particles can be scaled if the scanned area of the filter differs from the flow-through area on

the filter. The final counting result must be normalized to a wetted surface area of 1000 cm².

Contamination LevelsThe contamination level is defined by the maximum number of particles for each class as:

Cleanliness CodeThe combination of particle class and the number of particles results in a cleanliness code. The prefix “A” indicates the

normalization to a wetted surface area of 1000 cm².

Example: A (B15/C13/D12/E10/F7/GH5/IJ0/K00)


B 5 µm ≤ x < 15 µmC 15 µm ≤ x < 25 µm

D 25 µm ≤ x < 50 µm

E 50 µm ≤ x < 100 µm

F 100 µm ≤ x < 150 µm

G 150 µm ≤ x < 200 µm

H 200 µm ≤ x < 400 µm

I 400 µm ≤ x < 600 µm

J 600 µm ≤ x < 1,000 µm

K x ≥ 1,000 µm

Contamination level Particles per 100 cm² washed surface area

00 00 0 < n ≤ 1

1 1 < n ≤ 2

2 2 < n ≤ 4

3 4 < n ≤ 8

4 8 < n ≤ 16

5 16 < n ≤ 32

6 32 < n ≤ 64

7 64 < n ≤ 130

8 130 < n ≤ 250

9 250 < n ≤ 500

10 500 < n ≤ 1,000

11 1,000 < n ≤ 2,000


12 2,000 < n ≤ 4,00013 4,000 < n ≤ 8,000

14 8,000 < n ≤ 16,000

15 16,000 < n ≤ 32,000

16 32,000 < n ≤ 64,000

17 64,000 < n ≤ 130,000

18 130,000 < n ≤ 250,000

19 250,000 < n ≤ 500,000

20 500,000 < n ≤ 1,000,000

21 1,000,000 < n ≤ 2,000,000

22 2,000,000 < n ≤ 4,000,000

23 4,000,000 < n ≤ 8,000,000

24 8,000,000 < n ≤ 16,000,000

Standard: ISO 16232-10:2007 (A)

7



of contamination of these components. This standard refers to the number of particles per component.


bins:



the filter. The final counting result must be normalized to the number of washed parts.

Contamination LevelsThe number of particles is the final result. A contamination level is not defined.

Cleanliness CodeThe combination of particle class and number of particles results in a cleanliness code. The prefix “N” indicates

normalization to washed parts.

Example: N (B52171/C11072/D5412/E1199/F181/G50/H47/I12/J2/K0)


B 5 µm ≤ x < 15 µmC 15 µm ≤ x < 25 µm

D 25 µm ≤ x < 50 µm

E 50 µm ≤ x < 100 µm

F 100 µm ≤ x < 150 µm

G 150 µm ≤ x < 200 µm

H 200 µm ≤ x < 400 µm

I 400 µm ≤ x < 600 µm

J 600 µm ≤ x < 1,000 µm

K x ≥ 1,000 µm

Standard: ISO 16232-10:2007 (N)


8



of contamination of these components. This standard refers to 100 cm³ of wetted volume of the component.


bins:



the filter. The final counting result must be normalized to a wetted volume of 100 cm³.


Cleanliness CodeThe combination of particle class and contamination level results in a cleanliness code. The prefix “V” indicates the

normalization to a wetted volume of 100 cm³.

Example: V (B12/C10/D9/E6/F4/GH2/IJ0/K00)


B 5 µm ≤ x < 15 µmC 15 µm ≤ x < 25 µm

D 25 µm ≤ x < 50 µm

E 50 µm ≤ x < 100 µm

F 100 µm ≤ x < 150 µm

G 150 µm ≤ x < 200 µm

H 200 µm ≤ x < 400 µm

I 400 µm ≤ x < 600 µm

J 600 µm ≤ x < 1,000 µm

K x ≥ 1,000 µm

Contamination level Particles per 100 cm3 washed surface volume

00 00 0 < n ≤ 1

1 1 < n ≤ 2

2 2 < n ≤ 4

3 4 < n ≤ 8

4 8 < n ≤ 16

5 16 < n ≤ 32

6 32 < n ≤ 64

7 64 < n ≤ 130

8 130 < n ≤ 250

9 250 < n ≤ 500

10 500 < n ≤ 1,000

11 1,000 < n ≤ 2,000

Contamination level Particles per 100 cm3 washed surface volume

12 2,000 < n ≤ 4,00013 4,000 < n ≤ 8,000

14 8,000 < n ≤ 16,000

15 16,000 < n ≤ 32,000

16 32,000 < n ≤ 64,000

17 64,000 < n ≤ 130,000

18 130,000 < n ≤ 250,000

19 250,000 < n ≤ 500,000

20 500,000 < n ≤ 1,000,000

21 1,000,000 < n ≤ 2,000,000

22 2,000,000 < n ≤ 4,000,000

23 4,000,000 < n ≤ 8,000,000

24 8,000,000 < n ≤ 16,000,000

Standard: ISO 16232-10:2007 (V)

9

This international standard defines cleanliness classes for particulate contamination of hydraulic fluids.


bins:



the filter. The final counting result must be normalized to 100 ml of hydraulic fluid.


Cleanliness CodeThe result is the largest contamination level of all particle classes. The particle class itself is not displayed.

Example: 11


B 5 µm ≤ x < 15 µmC 15 µm ≤ x < 25 µm

D 25 µm ≤ x < 50 µm

E 50 µm ≤ x < 100 µm

F x ≥ 100 µm



00 125 22 4 1 00 250 44 8 2

1 500 88 16 3 1

2 1,000 178 32 6

3 2,000 356 63 11 2

4 4,000 712 126 22 4

5 8,000 1,425 253 45 8

6 16,000 2v850 506 90 16

7 32,000 5,700 1,012 180 32

8 64,000 11,400 2,025 360 64

9 128,000 22,800 4,050 720 128

10 256,000 45,600 8,100 1,440 256

11 512,000 91,200 16,200 2,880 512

12 1,024,000 182,400 32,400 5,720 1,024

13 2,048,000 364,800 64,800 11,520 2,048

14 4,096,000 729,000 129,600 23,040 4,096

Standard: NAS 1638:1964


10

This international standard specifies the code to be used in defining the quantity of solid particles in the fluid used in a

given hydraulic fluid power system. This standard refers to 1 ml of the filtered fluid.


bins:




Contamination LevelsThe contamination level of each class is defined as::

Cleanliness CodeThe contamination levels of the two particle classes are shown.

Example: 19/14


B x ≥ 5 µmC x ≥ 15 µm


0 0 < n ≤ 0.011 0,01 < n ≤ 0,02

2 0,02 < n ≤ 0,04

3 0,04 < n ≤ 0,08

4 0,08 < n ≤ 0,16

5 0,16 < n ≤ 0,32

6 0,32 < n ≤ 0,64

7 0,64 < n ≤ 1,3

8 1,3 < n ≤ 2,5

9 2,5 < n ≤ 5

10 5 < n ≤ 10

11 10 < n ≤ 20

12 20 < n ≤ 40

13 40 < n ≤ 80

14 80 < n ≤ 160


15 160 < n ≤ 32016 320 < n ≤ 640

17 640 < n ≤ 1,300

18 1,300 < n ≤ 2,500

19 2,500 < n ≤ 5,000

20 5,000 < n ≤ 10,000

21 10,000 < n ≤ 20,000

22 20,000 < n ≤ 40,000

23 40,000 < n ≤ 80,000

24 80,000 < n ≤ 160,000

25 160,000 < n ≤ 320,000

26 320,000 < n ≤ 640,000

27 640,000 < n ≤ 1,300,000

28 1,300,000 < n ≤ 2,500,000

>28 n ≥ 2,500,000

Standard: INF ISO 21018:2008

11

This French standard is for determination of particulate contamination in hydraulic fluids.


bins:







B 5 µm ≤ x < 15 µmC 15 µm ≤ x < 25 µm

D 25 µm ≤ x < 50 µm

E 50 µm ≤ x < 100 µm

F x ≥ 100 µm

Standard: NF E 48-651:1986


12

Specifics• The results can be based on differential or on cumulative counts.

• The contamination levels are defined for differential and for cumulative classification.

This French standard is inspired by NAS 1638, but with different expression of results.

Particle Size ClassificationThe maximum Feret diameter (x) is measured for each particle. All particles are classified into one of two bins:

Differential bins

Scaling and NormalizationThis number of particles can be scaled if the scanned area of the filter differs from the flow-through area on the filter.

The final counting result must be normalized to 100 ml of hydraulic fluid.

Cumulative bins


B 5 µm ≤ x < 15 µmC 15 µm ≤ x < 25 µm

D 25 µm ≤ x < 50 µm

E 50 µm ≤ x < 100 µm

F x ≥ 100 µm


B x ≥ 5 µmC x ≥ 15 µm

D x ≥ 25 µm

E x ≥ 50 µm

F x ≥ 100 µm

Standard: NF E 48-655:1989

13


Cleanliness CodeThe result is the contamination level for each particle class.

Example: [8-8-10-10-11]



00 125 22 4 1 00 250 44 8 2

1 500 88 16 3 1

2 1,000 178 32 6

3 2,000 356 63 11 2

4 4,000 712 126 22 4

5 8,000 1,425 253 45 8

6 16,000 2,850 506 90 16

7 32,000 5,700 1,012 180 32

8 64,000 11,400 2,025 360 64

9 128,000 22,800 4,050 720 128

10 256,000 45,600 8,100 1,440 256

11 512,000 91,200 16,200 2,880 512

12 1,024,000 182,400 32,400 5,720 1,024

13 2,048,000 364,800 64,800 11,520 2,048

14 4,096,000 729,000 129,600 23,040 4,096


14

The contamination level for cumulative classes is defined by the maximum particle number for each class as:



00 152 27 5 1 00 304 54 10 2

1 609 109 20 4 1

2 1,217 217 39 7

3 2,432 432 76 13 2

4 4,864 864 152 26 4

5 9,731 1,731 306 53 8

6 19,462 3,462 612 106 16

7 38,924 6,924 1,224 212 32

8 77,849 13,849 2,448 424 64

9 155,558 27,698 4,898 848 128

10 311,396 55,396 9,796 1,896 256

11 622,792 110,792 19,592 3,392 512

12 1,245,584 221,584 39,184 6,784 1,024

13 2,491,188 443,168 78,368 13,668 2,048

14 4,981,736 885,736 156,736 27,136 4,096

This international standard defines cleanliness classes for particulate contamination of hydraulic fluids. The classes

selected are based on NAS 1638 cleanliness classes.

Standard: SAE A S4059:2011

15

Specifics• The results can be based on differential or on cumulative counts.

• The contamination levels are defined for differential and for cumulative classification.

Particle Size ClassificationThe maximum Feret diameter (x) is measured for each particle. All particles are classified into one of two bins:

Differential bins

Scaling and NormalizationThis number of particles can be scaled if the scanned area of the filter differs from the flow-through area on the filter.

The final counting result must be normalized to 100 ml of hydraulic fluid.

Cumulative bins


B 5 µm ≤ x < 15 µmC 15 µm ≤ x < 25 µm

D 25 µm ≤ x < 50 µm

E 50 µm ≤ x < 100 µm

F x ≥ 100 µm


B x ≥ 5 µmC x ≥ 15 µm

D x ≥ 25 µm

E x ≥ 50 µm

F x ≥ 100 µm


Cleanliness CodeThe result is the largest contamination level of all particle classes. It is written with the name “AS4059” of the

cleanliness standard and the maximum contamination class and level.

Example: AS4059 Class 11F



00 125 22 4 1 00 250 44 8 2

1 500 88 16 3 1

2 1,000 178 32 6

3 2,000 356 63 11 2

4 4,000 712 126 22 4

5 8,000 1,425 253 45 8

6 16,000 2,850 506 90 16

7 32,000 5,700 1,012 180 32

8 64,000 11,400 2,025 360 64

9 128,000 22,800 4,050 720 128

10 256,000 45,600 8,100 1,440 256

11 512,000 91,200 16,200 2,880 512

12 1,024,000 182,400 32,400 5,720 1,024


16

The contamination level for cumulative classes is defined by the maximum particle number for each class as:



000 76 14 3 1 000 152 27 5

0 304 54 10 2

1 609 109 20 4 1

2 1,217 217 39 7

3 2,432 432 76 13 2

4 4,864 864 152 26 4

5 9,731 1,731 306 53 8

6 19,462 3,462 612 106 16

7 38,924 6,924 1,224 212 32

8 77,849 13,849 2,449 424 64

9 155,698 27,698 4,898 848 128

10 311,396 55,396 9,796 1,696 256

11 622,792 110,792 19,592 3,392 512

12 1,245,584 211,584 39,184 6,784 1,024

This standard is based on the international standard ISO 16232 and modified by the German association of car

manufacturers (VDA = Verband der Automobilindustrie). The standard defines the cleanliness of components for the

fluid circuits of motor vehicles. It also defines the levels of contamination of these components. This standard refers to

1000 cm² of wetted surface of the component.

Specifics• Adjust the camera exposure time or the microscope illumination to get an image intensity of 55% of the possible

image dynamics for the white filter membrane.

• Intensity threshold for particle detection set to 70% of the value for the filter membrane.


bins:


the filter. The final counting result must be normalized to a 1000 cm² wetted surface area.

The absolute number of particles is counted for each class. The small

classes B, C, and D are optional.


B 5 µm ≤ x < 15 µmC 15 µm ≤ x < 25 µm

D 25 µm ≤ x < 50 µm

E 50 µm ≤ x < 100 µm

F 100 µm ≤ x < 150 µm

G 150 µm ≤ x < 200 µm

H 200 µm ≤ x < 400 µm

I 400 µm ≤ x < 600 µm

J 600 µm ≤ x < 1,000 µm

K 1,000 µm ≤ x < 1,500 µm

L 1,500 µm ≤ x < 2,000 µm

M 2,000 µm ≤ x < 3,000 µm

N x ≥ 3,000 µm

Standard: VDA 19.1:2015 (A)

17


Cleanliness CodeThe combination of particle class and number of particles results in a cleanliness code. The prefix “A” indicates

normalization to a 1000 cm² wetted surface area

Example: A (B15/C13/D12/E10/F7/GH5/IJ0/KLMN00)

Contamination level Particles per 100 cm2 washed surface area

00 00 0 < n ≤ 1

1 1 < n ≤ 2

2 2 < n ≤ 4

3 4 < n ≤ 8

4 8 < n ≤ 16

5 16 < n ≤ 32

6 32 < n ≤ 64

7 64 < n ≤ 130

8 130 < n ≤ 250

9 250 < n ≤ 500

10 500 < n ≤ 1,000

11 1,000 < n ≤ 2,000


12 2,000 < n ≤ 4,00013 4,000 < n ≤ 8,000

14 8,000 < n ≤ 16,000

15 16,000 < n ≤ 32,000

16 32,000 < n ≤ 64,000

17 64,000 < n ≤ 130,000

18 130,000 < n ≤ 250,000

19 250,000 < n ≤ 500,000

20 500,000 < n ≤ 1,000,000

21 1,000,000 < n ≤ 2,000,000

22 2,000,000 < n ≤ 4,000,000

23 4,000,000 < n ≤ 8,000,000

24 8,000,000 < n ≤ 16,000,000


18




100 cm³ of wetted volume of the component.





bins:

Scaling and NormalizationThe combination of particle class and contamination level results in a cleanliness code. The prefix “V” indicates the

normalization to a wetted volume of 100 cm³.




B 5 µm ≤ x < 15 µmC 15 µm ≤ x < 25 µm

D 25 µm ≤ x < 50 µm

E 50 µm ≤ x < 100 µm

F 100 µm ≤ x < 150 µm

G 150 µm ≤ x < 200 µm

H 200 µm ≤ x < 400 µm

I 400 µm ≤ x < 600 µm

J 600 µm ≤ x < 1,000 µm

K 1,000 µm ≤ x < 1,500 µm

L 1,500 µm ≤ x < 2,000 µm

M 2,000 µm ≤ x < 3,000 µm

N x ≥ 3,000 µm

Standard: VDA 19.1:2015 (V)

19


Cleanliness CodeThe combination of particle class and contamination level results in a cleanliness code. The prefix “V” indicates the

normalization on wetted volume.

Example: V (B12/C10/D9/E6/F4/GH2/IJ0/KLMN00)

Contamination level Particles per 100 cm³ washed volume

00 00 0 < n ≤ 1

1 1 < n ≤ 2

2 2 < n ≤ 4

3 4 < n ≤ 8

4 8 < n ≤ 16

5 16 < n ≤ 32

6 32 < n ≤ 64

7 64 < n ≤ 130

8 130 < n ≤ 250

9 250 < n ≤ 500

10 500 < n ≤ 1,000

11 1,000 < n ≤ 2,000

Contamination level Particles per 100 cm³ washed volume

12 2,000 < n ≤ 4,00013 4,000 < n ≤ 8,000

14 8,000 < n ≤ 16,000

15 16,000 < n ≤ 32,000

16 32,000 < n ≤ 64,000

17 64,000 < n ≤ 130,000

18 130,000 < n ≤ 250,000

19 250,000 < n ≤ 500,000

20 500,000 < n ≤ 1,000,000

21 1,000,000 < n ≤ 2,000,000

22 2,000,000 < n ≤ 4,000,000

23 4,000,000 < n ≤ 8,000,000

24 8,000,000 < n ≤ 16,000,000


20




the number of particles per component.





bins

Scaling and NormalizationThe maximum Feret diameter (x) is measured for each particle. All particles are classified into the following differential

bins




Cleanliness CodeThe combination of particle class and number of particles results in a cleanliness code. The prefix “N” indicates the

normalization to washed parts.

Example: N (B52171/C11072/D5412/E1199/F181/G50/H47/I12/J2/KLMN0)


B 5 µm ≤ x < 15 µmC 15 µm ≤ x < 25 µm

D 25 µm ≤ x < 50 µm

E 50 µm ≤ x < 100 µm

F 100 µm ≤ x < 150 µm

G 150 µm ≤ x < 200 µm

H 200 µm ≤ x < 400 µm

I 400 µm ≤ x < 600 µm

J 600 µm ≤ x < 1,000 µm

K 1,000 µm ≤ x < 1,500 µm

L 1,500 µm ≤ x < 2,000 µm

M 2,000 µm ≤ x < 3,000 µm

N x ≥ 3,000 µm

Standard: VDA 19.1:2015 (N)

21

M E M O


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Shinjuku Monolith, 2-3-1 Nishi-Shinjuku, Shinjuku-ku, Tokyo 163-0914, Japan

technical cleanliness inspection system …...technical cleanliness inspection system olympus cix...

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