GB/T 14039:2002 is based on ISO 4406:1999.
|
Particle Size |
Size x in µm |
|---|---|
|
Class 1 |
5 ≤ x < ∞ |
|
Class 2 |
15 ≤ x < ∞ |
1. Particle Concentration Classification
Depending on the normalization parameter the particle count per size class is expressed in contamination level as shown in the table:
|
Contamination Level |
Particle Count |
|---|---|
|
0 |
1.00 |
|
1 |
2.00 |
|
2 |
4.00 |
|
3 |
8.00 |
|
4 |
16.00 |
|
5 |
32.00 |
|
6 |
64.00 |
|
7 |
130.00 |
|
8 |
250.00 |
|
9 |
500.00 |
|
10 |
1000.00 |
|
11 |
2000.00 |
|
12 |
4000.00 |
|
13 |
8000.00 |
|
14 |
16000.00 |
|
15 |
3200.000 |
|
16 |
64000.00 |
|
17 |
130000.00 |
|
18 |
250000.00 |
|
19 |
500000.00 |
|
20 |
1000000.00 |
|
21 |
2000000.00 |
|
22 |
4000000.00 |
|
23 |
8000000.00 |
|
24 |
160000000.00 |
|
25 |
320000000.00 |
|
26 |
640000000.00 |
|
27 |
130000000.00 |
|
28 |
250000000.00 |
|
>28 |
∞ |
2. Normalization
The absolute particle number is divided by the applied oil volume and standardized to 100 ml.
Default Values for Particle Typification
|
Particle Type |
Description |
|---|---|
|
Fiber |
Length (Feret Max) > 100 µm |
|
Particle |
If the particle is not in the range of Fiber, it is a particle. |
As a Supervisor, you can edit the values in the Standard Template Editor, see Standard Template Editor.
Occupancy Rate
The occupancy rate is a measurement value to describe the quality of the specimen preparation in terms of particle density, and the distribution of particles on the effective filter area. The calculation is performed as follows:
Sum of the particle area of all detected particles in relation to measurement frame area. Value in %.
For more information, see
- About Filters and Occupancy Rate
- Occupancy Rate (Oil, Lubricants) Tool
3. Core parameter for size class distribution
Length = Feret Max (default use case), see Feret Maximum
Width = Feret Min (default use case), see Feret Minimum