182
SYNRAD FH Series Flyer Operator’s Manual Version 3.4
Maintenance
2
Remove the focusing lens as described in the Lens mount removal/replacement section above.
Caution
possible
lens
damage
Do not allow the nozzle of the air bulb to touch the optical surface.
Any contact may damage the optic by scratching coatings on the
optical surface.
Do not use compressed shop air to blow contamination from the op-
tic. Compressed air contains significant amounts of water and oil that
form absorbing films on the optical surface.
Do not exert pressure on the surface of the optic during cleaning.
Optical surfaces and coatings are easily scratched by dislodged con-
taminants.
Use a new wipe on each pass as contaminants picked up by the wipe
may scratch the optical surface.
3 Remove loose contaminants from the focusing lens by holding a clean air bulb at an angle to the
lens and blow a stream of air at a glancing angle across the lens surface. Repeat as necessary.
4 Refer to Table
7
-2 and select the appropriate cleaning solvent based on the type of contamination
that exists on the surface of the lens.
Table
7
-2
Cleaning solvent selection
Solvent Type
Classification
Application
Ethyl alcohol
Least aggressive
Initial dust cleaning
Acetone
Moderately aggressive
Oily residues
Minor baked-on plastics
5
Dampen a lens wipe with the selected cleaning agent.
Note: If acetone is used as the cleaning solvent, a second follow-up cleaning of the optical surface using
ethyl alcohol is required to remove any acetone residue.
6
Gently, and without applying pressure, wipe the damp lens wipe across the optic surface in a single
pass. Do not rub or apply pressure, especially when using a cotton swab. Drag the wipe without ap-
plying any downward pressure.
Note: Use a clean lens wipe on each pass. The wipe will pick up and carry surface contaminants that
may scratch the optical surfaces or coatings.
To prevent streaking during the final ethyl alcohol cleaning, drag the lens wipe slowly across the
surface so that the cleaning liquid evaporates right behind the wipe.
Содержание FH FLYER
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