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Sealing
Sealing the IntelliTouch touchscreen is not required for operation; however, it is
recommended to increase the resistance to dirt and moisture. Elo recommends
using closed-cell polyolefin based foam with an adhesive backing on one side.
Elo sells sealing foams with varying thickness to accommodate most needs.
Note:
Other foams may actually reduce the acoustic signal, thus resulting in detrimental
effects.
Install the seal as follows:
• Place the bezel face down on a padded surface, so that you can obtain access
to the inside lip.
• Cut enough of the sealing foam so that it can be installed in one continuous
run.
• Starting from the middle-top; Begin placing the sealing foam, adhesive side
to the bezel.
• The sealing foam should be flush with the bezel opening, and not dipping
inward or outward.
• The radius curves in the corners can be aided by slightly nicking the outside
of the sealing foam just before the corner.
• Butt the end of the sealing foam tightly against its beginning.
Note:
The sealing foam must be positioned so that it makes contact with the touchscreen within
the active area. It is not acceptable for the sealing foam to contact the reflector arrays
(See page 30 for details).
Spacing the LCD from the Bezel
The last part of the touchscreen mounting procedure is to determine the
appropriate spacing of the LCD from the bezel, (with the touchscreen attached),
and to reinstall the LCD with the required spacers in place. Do not clamp the
touchscreen between the bezel and the LCD without proper spacing as
breakage will almost certainly occur. The nominal thickness of the touchscreen
and the one layer of adhesive tape is 3/16-inch (5 mm). If the touchscreen were
to be in contact with the bezel, 3/16-inch (5 mm) spacers would be required.
During the spacer selection process, you may have to install the LCD with the
touchscreen attached in the bezel several times to obtain proper fit. When
spacers for the desired gap have been selected, install the LCD. Select a screw
that is long enough to compensate for the spacer thickness (provides at least
three full turns into the mounting post threads) but not so long as to penetrate
the surface of the bezel. Over-tightening the screws may strip or split the
mounting posts.