Thermo Scientific 5028i Instruction Manual page 157

Preventive Maintenance
Cleaning the Inlets
Figure 5–1. U.S. EPA PM Inlet
10
Once a month the sampler inlet should be dismantled and cleaned.
Mark each assembly point of the sampler inlet with a pen or pencil to
provide reference marks during reassembly.
Disassemble the sample inlet unit according to Figure 5–1. If the
assembly screws are frozen, apply penetrating oil or commercial
lubricant to make removal easier. Clean all interior surfaces and the
bug screen with a general purpose cleaner or compressed air, paying
particular attention to small openings and cracks. Cotton swabs and/or
a small brush are helpful. Completely dry all components.
Also monthly, check the O-rings for distortion, cracks, fraying, or other
problems and replace as necessary. Apply small amounts of grease to the
rings before assembling the unit.
Reassemble the unit in accordance with the previously scribed match
marks. Particular care should be taken to ensure that all O-rings seals
are properly seated and that all screws are uniformly tightened.
European PM /PM Inlet
The same schedule should be used for the European PM Inlet (e.g.
10
10 2.5
Leckel), at approximately a 1-2 month interval. The components of the
inlet should be inspected and cleaned as necessary. Figure 5–2 provided
below provides an image and design drawing of the inlet, with references
to parts.
Thermo Fisher Scientific Model 5028i Instruction Manual 5-3