Kodak I780 - Manual (Page 34)

Test #2—Determine dust particle size to trigger DR-X10C Dust Detection System—
detailed results
The intent of this test was to determine under what conditions the Dust Detection System
would detect dust.
Using a “Dust Creation Tool” to create dust quickly, we also needed a way to prevent the dust
brush from cleaning the imaging area. We taped a piece of plastic document protector over
the brush mechanism.
To determine if the Dust Detection System was operating, we placed a sticky note over the
image guide. This action triggered a dust detection “event.”
We then cut the sticky notes into smaller and smaller width strips and placed them on the
image guides. This also triggered a dust event. We were able to create a sliver at about 1/16th
inch wide. This also triggered a dust detection event. We concluded that the Dust Detection
System was functioning.
We scanned for several days using the Dust Creation Tool. We were disabling and re-enabling
every 10 documents. The Dust Detection System did not detect dust.
Return to Real-world environment ➡
Table of Contents ➡
We placed a pile of dust just before the image guide and allowed the document to spread dust
throughout the scanner. The dust was visible in the image, but the Dust Detection System did
not detect a dust error.
We scanned in bitonal image capture mode and got the same results.
As a last test we taped a human hair across the imaging area. This was immediately detected
when the scanner was enabled.
Overall testing conclusion
The Dust Detection System did not detect dust but could detect more dense or solid objects.
We concluded that if the test was run long enough, the dust would have built up to the point
were the Dust Detection System would have triggered an event. However, streaks caused by
dust would have been noticeable in images long before then.
Appendix 5—Real-world environment—Testing methodology and results (dust and contaminants), continued