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R5976255
A
TLAS
CS4 (2001-03)
11-2
11.1 Cleaning of Screens
11.1.1 General
Screens consist of single or double screen elements. Each screen element has a delicate optical
screen surface structure dedicated to its functionality. The optical surface can easily be damaged if
the screen is handled incorrectly. Only handle screens while wearing gloves with a soft texture (eg.
cotton gloves).
Avoid touching the rear beaded surface unnecessarily. It is easily damaged.
11.1.2 Cleaning the Screen
The screen is a high-precision optical component. It is made of plastic and is not
scratch-proof. Only use a soft, damp cloth when cleaning.
If the screen is only slightly dusty or is showing particles a vacuum cleaner with a soft bristle or a
feather duster is recommended. Clean compresses air can be used, but it makes the screen stati-
cally charged, attracting airborn particles. The brushing direction should always be along the opti-
cal structures in the screen (circular in case of fresnel).
If the dirt on the screen is heavier, possibly from fingerprints, soft lint-free cloth or paper towel
can be used. If required the screen may be cleaned with a cleaning agent, such as ordinary window
cleaner with ammonia (not alcohol). Never apply cleaning solution directly onto the screen sur-
face. Instead, add cleaning agent to the cloth or towel, then wipe the surface. It is important that
the screen should be completely dry after treatment.
Never use cleaning agents with solvents as these may destroy the screen. Also, never
rub hard or persistently on the screen in order to remove stains, as this will cause
deformations in the surface which will appear as stains.
Don’t store screens at temperatures exceeding 38ºC (100ºF)