Maintenance
41
Cleaning and Oiling Impactors
Follow the recommended Impactor cleaning interval for size selective
Impactors used with Models 8540, 8540-M, and 8542-M
Environmental DustTrak instruments shown below.
Recommended impactor maintenance interval is every two months
e
xcept where the ‘average dust concentration’ level indicated in the
table shows the impactor should be cleaned more frequently:
Average dust
concentration (mg/m
3
)
Impactor
maintenance interval
0.015
97 days
0.025
60 days
0.035
42 days
0.050
30 days
0.100
16 days
0.150
10 days
0.250
6 days
0.400
4 days
1. Unscrew Impactor. Check O-ring on the Impactor base.
2. Clean outside and inside of Impactor and the Impactor plate using
a clean brush and a light solvent. Dry impactor parts by blowing it
out with compressed air, or let it air-dry thoroughly.
3. Apply two drops of oil (included) to the impactor plate. Do
not
over-fill impaction plate.
Figure 39: Apply 2 Drops of Oil to Impactor Plate
4. Screw (hand-tighten) impactor back together.
Summary of Contents for DUSTTRAK 854030
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