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16 Pelco Manual C429M-B (2/98)
6.0 MAINTENANCE
Clean the acrylic lower dome as necessary to maintain a clear picture. Be careful
not to scratch the surfaces of the dome.
Exterior Surface - Clean the dome's exterior surface with a nonabrasive cleaning
cloth and cleaning agent that is safe for acrylic plastic. Either liquid or spray cleaner/
wax suitable for fine furniture is acceptable.
Interior Surface (Except Chrome) - Clean the same as the exterior surface.
Interior Surface (Chrome) - The inside surface of a chrome dome is easily scratched.
Use the following precautions to maintain the dome's surface.
a. Always handle the dome from the outside of its circular flange.
b. Never touch the coated inside surface. The acid in your fingerprints will even-
tually etch the coating if the fingerprints are not carefully removed according
to the recommended cleaning procedure in item “e.”
c. If dust or other contaminants accumulate on the dome's interior, remove the
debris with compressed air. Compressed air cans are available from photo-
graphic equipment or electronic supply dealers.
d. If heavy residue accumulates and cannot be removed with air pressure, rinse
with water and immediately dry with air pressure so that water spots will not
remain. Avoid wiping the coated surface with direct hand pressure - it will eas-
ily abrade unless extreme care is taken. Once scratched, the dome cannot be
recoated.
e. If internal wiping is necessary, avoid hand rubbing. Instead, make a wick as
follows:
Use a very soft paper towel. Roll a section into a tightly wound tube. Tear the
tube in half, and wet the fuzzy end of the wick with a solution of isopropyl
alcohol diluted with water. Hold the dome with its opening facing downward
and wipe the interior of the dome with the wet end of the wick. Use a circular
motion, starting from the outside and spiraling into the center. Use a new wick
for each two passes over the dome.