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Maintenance
This chapter explains the daily maintenance that must be performed
on the Measuring Projector PJ-A3000 series, including cleaning and
the replacement of consumable parts.
5
5.1 Maintenance of Optical Components
5.1.1 Projection lens
Compared with ordinary hard glass, the optical glass of the projection lens used for the
projector is soft and subject to scratches. In order to remove dust do not use a cloth to
wipe the lens, but use a blower brush instead.
To remove oil or fingerprints, dampen clean gauze with a mixture of high-grade alcohol
and ether in a ratio of 8 to 2, and wipe gently using a circular motion.
For lens storage, replace the lens cap and store it in its case.
Also replace the lens cap when the projector is not in use, although the lens does not
have to be removed from the projector.
5.1.2 Half-reflecting mirror for surface illuminator
T he half mirror for 10x and 20X is coated with a plastic film which tends to collect dust.
Since the mirror surface is subject to scratches, take sufficient care when handling it.
Use a blower brush to remove any dust from the mirror.
5.1.3 Mirror (surface reflecting mirror)
Since the mirror used in the projector is silvered on its front face rather than on its back,
unlike ordinary mirrors, it is highly subject to scratches. Ensure it is free from dust or oil.
Should the mirror become stained, use the same cleaning procedure as for the
projection lens. Greater precautions, however, are required for handling the mirror.
5.1.4 Screen glass
Use a soft cloth with diluted neutral detergent and wipe the glass when removing oil and
finger print. After wiping, remove the detergent by wiping with a soft cloth soaked with
water.
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