Reference Test Block N.2
The reference block type 2 (ISO 3452-3) is used for verification of the penetration system's (ISO 3452-1) operation (performance) at the beginning of each period.
This reference block is composed from 2 parts:
- defect surface
- rinsing surface
The defect surface contains 5 imprints with graduating scales:
| imprint n. | 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|---|
| diameter [mm] | 3.0 | 3.5 | 4.0 | 4.5 | 5.5 |
The rinsing surface enables verification of washing away ability of penetration agents and it is composed from 4 fields with graduating roughness:
| field | 1 | 2 | 3 | 4 |
|---|---|---|---|---|
| roughness Ra [µm] | 2,5 | 5 | 10 | 15 |
This gauge can by no means be used as equivalent where the use of PSM-5 is prescribed.
