Fujitsu fi-4530C Operator's Manual page 63

3. Select the detection conditions from [Double Feed Detection] under [ADF Option].
The following are the detection conditions
None
Check overlapping
Check length
Check overlapping
and length
Furthermore, refer to "6.5 Double-feed Detection Conditions" on page 108 for detailed
information about the document for double-feed detection.
4. Click the [OK] button.
The display returns to the [TWAIN Driver] dialogbox. Then, perform the scanning operation
on the dialogbox.
48
Double-feed detection is not performed
The scanner monitors the overlapping of documents.
It detects a double-feed by differences in document
thickness when two or more document sheets are fed
overlapping.
The scanner monitors the length of documents. It
detects a double-feed by differences in the document
length when two or more document sheets are fed
overlapping.
The scanner monitors both document overlapping
and length to detect double-feeds.