Page 18
Instruction Manual Mesotest II
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8.2. Replacing the Viewing Aperture Lining
The lining of the viewing aperture consists of
an elastic material. There is a slot on its
outer edge which slips onto the front frame
of the unit's casing. The lining of the viewing
aperture is reinforced on the inside with a
wire clip spring to stabilize its shape.
The unit can be laid on its back in order to
replace the lining of the viewing aperture.
Caution! Disconnect the
mains plug before tipping
the unit.
Be sure to lay the unit on
a soft surface.
Caution! Be careful not to
damage the glass of the viewing aperture
when installing the new lining of the
viewing aperture.
In order to replace the lining of the viewing
aperture, first remove the clip spring (Figure
10 a).
To do this, grasp the clip spring successively
by both of its rounded ends and unhook the
ends of the spring upwards out of the rubber
holder. Then pull the clip spring completely
out of the upper guide slot.
Now press the lining of the viewing aperture
out of its guide slot and pull it out, starting on
one side (Figure 10 b).
The replacement is carried out in the
reverse order:
Compress the lining of the viewing aperture
vertically and insert it into the frame of the
casing. Beginning from either side, press the
slot of the viewing aperture lining into the
frame. Take care not to bend the small
ventilation openings at the back.
With the continuous spring uppermost, place
the clip spring into its guide slot (Figure 11).
Take care that the spring is completely in
the slot.
Then grasp both rounded ends of the clip
spring one after the other and hook them
again into the groove at the bottom.
Figure 10 a - Removing the clip spring
Figure 10 b - Removing the lining of the viewing
aperture
Figure 11 - Inserting the clip spring
