Delta Core i3 Series Operation Manual page 84

Select '4 Points Calibration' to enter the page.
3.
4. Click the four corners on the screen (see below) to complete the 4 points calibration.
A p p e n d i x A P P C To u c h S c r e e n U s a g e a n d C a l i b r a t i o n
A_
A - 3