Wincor Nixdorf BA92, User Manual

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BA92/BA93/BA93W User Manual
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Cleaning instructions
Always turn off the system before cleaning
The glass surface of your Touch Screen should be cleaned with a
mild, abrasive free, commercially available glass cleaning product.
All pH neutral materials (pH 6 to 8) are good for cleaning.
Cleaners with pH values 9 to 10 are not recommended. Cleaning
with water and isopropyl alcohol is possible as well. Do not use sol
vents containing acetic acid. Use a soft, fine-meshed cloth to clean
the surface. Dampen the cloth slightly and then clean the screen.
A wrong maintenance may cause damages to the screen, which
are not covered by guarantee or warranty.
Resistive Touch Screen
General information
The resistive TFT Touch Screen is constructed by a hard-coated polyester
top sheet that is overlaid on a conductively coated glass layer.
Voltage is applied to the top sheet. As the user touches the screen, the top
sheet compresses into contact with the glass layer, and current flows to
the four corners in proportion to the distance from the edge. The control-
ler then calculates the position of the finger or stylus, based on the current
flow. Because the controller derives both the “X” and “Y” touch coordi-
nates from the stable glass layer, the accuracy and operation of the touch
screen is unaffected by damage to the top sheet caused by extended use
or neglect.