Kodak i1840 User Manual page 44

UDDS Calibration
UDDS calibration is used to calibrate the ultrasonic document detection
system for multi-feeds. UDDS calibration is rarely needed. This
calibration should only be performed if there is a feeding or multi-feed
detection issue.
1. Touch Calibrate. The Calibration screen will be displayed.
2. Touch UDDS Calibration to display the UDDS Calibration screen.
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3. You will be prompted to place a 20 lb. or 75 g/m bond sheet of
paper in the input elevator. Do not use the calibration target.
4. Touch OK. The calibration results will be displayed.
5. When finished, touch End Job to return to the Idle screen.
3-26 A-61555 May 2010