Avision IS25 manual - Manual (Page 80)

Additional Length Detection
Additional Length Detection allows you to define the length
of document being multi-fed. This value indicates the
additional length exceeding your scan area. The Display
window will show the size of the document as you change
the value. A value of 0 indicates no additional length
detection. The Additional Length Detection is best used
when scanning same-size documents in the auto document
feeder.
Intelligent Mode (Skip Multi-Feed) By Ultrasonic
Detection
Some documents which are glued with a photo or a label
may easily be detected as multi-feed yet you wish to bypass
these multi-feed conditions. In this case, you can use the
intelligent mode to let the scanner memorizes and skips
these multi-feed conditions. Choice includes Disable, By
Length, By Position, By Length+Position. Note: The
availability of this feature varies based on type of
scanner.
By Length: When a multi-feed is detected for the first time,
the scanner memorizes the length of the paper attached to
the document. When you perform next scanning, this
pattern of multi-feed will be bypassed.
By Position: When a multi-feed is detected for the first
time, the scanner memorizes the position of the paper
attached to the document. When you perform next
scanning, this pattern of multi-feed will be bypassed.
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