Subject to change · V 2.02.20 · EN
Page 57
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17.1.4 Cleanliness classes according to GOST 17216
Function only available from software version 2.00.15.
The GOST 17216 is divided into different size classes. 5-15µm, 15-25µm, 25-50µm, …
The particles are counted differentially and not accumulated as in ISO 4406
The OPCom can only measure the sizes 4, 6, 14, 21 µm. Therefore, the cleanliness class is calculated only based on
GOST 17216.
The displayed GOST ordinal number is derived from the ISO 4406 ordinal numbers.
The following table shows the determination of the GOST ordinal number. If the determined ordinal number (ISO 4, 6 or 14µm) is
higher than the corresponding value in the table, the next higher GOST ordinal number is used.
A direct recalculation of GOST to ISO is not possible.
ISO 4406:17 GOST 17216
Display OPCom
4 µm 6 µm 14 µm
6 5 3 00
7 5 3 0
8 6 4 1
9 7 5 2
- 8 6 3
- 9 7 4
- 10 8 5
- 11 9 6
- 12 9 7
- 13 10 8
- 14 12 9
- 15 13 10
- 16 13 11
- 17 14 12
- 18 16 13
- 19 16 14
- 20 18 15
- 21 19 16
- 22 20 17
Table 40: Determination of the cleanliness classes according to GOST 17216
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