Cardiograph Care and Maintenance Maintaining the Touch Screen
2-16 PageWriter TC 70 Cardiograph Service Manual
NOTE If the Expected Max Error (%) field has not been reset to 2%, another calibration procedure
may be necessary. The max error value may not change if the full charge capacity has been
decreased by more than 256 mAh or increased by more than 512 mAh. If this occurs, another
calibration procedure is recommended as soon as it is convenient to further improve the accuracy
of displayed battery status information. For batteries with more than 8% of error, the maximum
error will remain unchanged if a limited calibration cycle occurs.
Maintaining the Touch Screen
The touch screen may require occasional maintenance, including calibration and cleaning.
Touch Screen Calibration
The touch screen may be calibrated at any time. Calibration is recommended if it requires
many attempts to select an item on the screen, or if selecting items on a specific area of the
screen is difficult.
The touch screen may also require calibration if the cardiograph is used in different settings
(seated instead of standing) or by users of significantly different height. The touch screen may
need to be recalibrated to work optimally in the new setting or with the new user.
To calibrate the touch screen:
1
Touch the Ctrl + Alt + C keys (on keyboard) at the same time.
2 A white screen appears with a cross hair (center of screen). Touch the middle of the cross
hair where the two lines intersect. When the cross hair is touched it moves to a new
location. Continue to touch the center of the cross hair.
3 Tap the screen (when a message appears) to end the test.
4 Touch the Done button to exit.
Touch Screen Cleaning
The touch screen may require occasional cleaning.
To clean the touch screen:
1
Dampen a soft cloth with water or with isopropyl alcohol.
2 Wring excess moisture from the cloth.
3 Wipe the touch screen area clean. Allow the touch screen to dry completely before use.
4 Perform the Barcode Test to verify performance.
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