The error message "Sensor calibration result was over the maximum threshold" appears on the scanner status window.
 Check the calibration panel for any foreign objects or dirt on the surface. If so, gently wipe the surface with a microfiber cloth.
 Check if the serial number of the calibration panel is the same with the PNL file in the calibration wizard.
 Check if the camera lenses or the mirror is contaminated. Please use a microfiber cloth to wipe the surface of the camera lenses and the mirror.