Avision AD 250F, User Manual

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User’s Manual
4-51
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.
Ultrasonic Detection
Ultrasonic Detection allows you to set overlapped document by
detecting paper thickness between documents. Note
：
The
availability of the function varies based on type of scanner.
There are two options available if Multi-Feed is detected.

Stop Scanning after Multi-Feed

If this is selected, the scanner will stop the feeder and
prompt a multi-feed warning message. In addition,
the multi-feed paper will be ejected from the scanner
automatically.
Note: The availability of the [Auto Clear Multi-Feed
Paper] feature varies based on scanner type. If your
scanner does not support this feature, remove the
multi-feed paper manually.

If this is not selected, the scanner will continue
scanning the entire document though multi-feed is
detected. After the entire document has been scanned,
a multi-feed dialog box will be prompted to indicate
the page number which has been detected multi-feed
and need to be rescanned.