Operating instructions

23
It’s Under Control
®
CHAPTER 3 | OPERATION
CALIBRATE TOUCHSCREEN
This button runs a routine that allows you to calibrate the touchscreen.
Since it normally should not be necessary to calibrate the touchscreen, this
routine is included as a precaution only.
Warning: Do not attempt to calibrate the touchscreen with your ngertip.
Proper calibration requires a stylus or other ne tip. Do not use metal
objects such as ball point pens or screwdrivers that can damage the
surface of the touchscreen.
Press the Calibrate button to continue.
Follow the directions on the display to complete the calibration process.
You can cancel the calibration by pressing the ‘exit’ keypad button on
the T4.