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Interactive Solutions Touch Screen User Guide
Page 68
Screen Calibration
Note: This feature is not available on all touch screens.
The touch sensor on the touch screen is separate from the display screen that it overlays. As a result, there
is no built-in relationship between the coordinates of a spot on the display screen and the coordinates it
senses when someone touches directly over that spot. So the software for the touch screen interface must
learn which spots on the touch sensor correspond to which areas of the display screen. This is called
screen calibration.
Initially, the touch screen is calibrated accurately, but sometimes the touch screen calibration drifts slightly
over time. The screen calibration feature allows you to recalibrate the display on the touch screen.
When you touch Screen Calibration, the screen clears and displays a circle in the upper left-hand corner
and the instruction to touch the circle three times to begin screen calibration.
Follow the instructions on the screen to touch each corner of the screen and then the center of the screen
three times each. Be sure to touch as exactly as possible in the center of each circle.
After you touch the last circle three times, you return to the Home screen, and the screen calibration is
complete.
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