Maintenance
22
AVL 415SE Smoke Meter — Maintenance Guide
2.3.3
Blackened Filter Area
The filter area must show homogeneous blackening with an exactly delineated,
round contour with a diameter of 29.8 ± 0.1 mm.
Spots with blurred
edges
Blurred edges indicate leaks in the suction unit.
• Check the suction unit (see Suction Unit on page 24).
Local dark spots
Dark spots indicate the formation of condensate or heavy soot deposits:
1. Check the gas path from the sampling probe to the filter paper.
2. Purge frequently.
3. Reduce the sampling volume and/or use the heating option.
4. Always replace the fine filter.
Fig. 4 Lubricating points for ratched clip roll
Pos 150
Pos 130
Pos 120
Pos 140
Pos 110
Lubricating
point
Lubricating
point
Lube points
(axles, inside)
Lube points (rollers,
inside and outside)
Fig. 5 Blackening of the filter