Elo TouchSystems IntelliTouch SecureTouch - Manual (Page 32)

2-20 I n t e l l i T o u c h / S e c u r e T o u c h G u i d e
When you have a good feel for the placement of the touchscreen, clean the
back side of the touchscreen and the face of the CRT again. Avoid all contact
between the cleaning solution and the mounting materials as the cleaner may
cause the mounting materials to eventually release from the glass. Remove
all lint with a brush or compressed air. Remove the liner from the adhesive
tape and align the touchscreen on the display. The thicker foam tape will
keep the adhesive tape away from the CRT until you are ready to adhere the
touchscreen to the display. Now press the touchscreen firmly against the
CRT.
If you must remove the touchscreen from the CRT, cut the adhesive tape
away with a sharp thin blade, such as an X-Acto knife. The touchscreen glass
will probably break if you try to pull it off by a corner or an edge. Shave the
old adhesive tape from the touchscreen and CRT with the knife. Adhesive
residues can be removed with denatured alcohol, which will leave streaks and
fingerprint smears. Use glass cleaner for the final cleaning prior to
reapplication of new tape.
4 Place touchscreen on CRT straight and centered.
5 Peel off 3 cm of tape backer in two opposite corners. Fold to make tabs.
6 Pull back on tab to remove tape backer from under touchscreen while
pressing on touchscreen.
7 Ensure there is nothing, such as tape, touching the reflector strips or
transducers.
Spacing the CRT from the Bezel
The last part of the touchscreen mounting procedure is to determine the
appropriate spacing of the CRT from the bezel, (with the touchscreen attached),
and to reinstall the CRT with the required spacers in place (refer to Figure 2.8
on page 31). Do not clamp the touchscreen between the bezel and the CRT
without proper spacers as breakage will almost certainly occur. The nominal
thickness of the touchscreen and the two layers of adhesive tape is 3/16-inch
(5 mm). If the touchscreen is to be in contact with the bezel, 3/16-inch (5 mm)
nominal spacers would be required.
Because the original CRT face-to-bezel mount is often an interference fit, with
the bezel shape altered slightly to draw it up tightly against the CRT, you should
start with a 1/16-inch (2 mm) thicker spacer than the nominal dimension above.
Two thicknesses of spacers, plus additional washers to use as shims, are
available in the Touchscreen Installation Kit. (See “Elo Part Numbers” on
page C-79 for Touchscreen Installation Kit).