You may notice that the touch screen on the tester is registering an incorrect location.  This issue can be confirmed on the tester by selecting a point on an AirMapper survey and seeing if the point location is at the same point that the screen was touched.  If they are noticeably different, a manual calibration process can be performed to improve the touch accuracy.  Please contact us for instructions on how to perform a manual calibration. 

Note: If new software is loaded onto the tester or factory defaults are restored, the manual calibration must be performed again.