Metrohm 900 Touch Control Manual - Manual (Page 522)

32.9 Diagnosis
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900 Touch Control
7 Press [ ] to finish the adjustment.
32.9.6 Testing the touch screen
System ▶ Diagnosis ▶ Touch screen test
You can use this test to check the function of the touch-sensitive monitor
screen.
A calibration is not possible with this test. If the Touch screen does not
work correctly anymore, it will need to be replaced. For that please con-
tact your Metrohm representative.
NOTE
You can use the [ ] fixed key to stop the test at any time.
Proceed as follows:
1 Tap on [Touch screen test].
A red square is displayed at the upper left.
2 Tap on the square as close to the center as possible.
The actual detected point of contact will be displayed by a cross hair,
and the deviation from the center will also be displayed on the lower
edge of the image.
The next red square will also be displayed.
3 Repeat step 2 until all of the areas in the display have been tested.
A list with fixed keys will appear.