NCR 7890, Руководство пользователя

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Operating Your 7890 Scanner
Presentation Scanning
4-2 User’s Guide
Presentation Scanning
Presentation scanning is much different from that used
at checkout stands, such as in grocery stores. In the
checkout stand environment, normally large quantities
of items must be scanned in a short amount time.
Therefore, you pass the items over the scanner, moving
them from one side of the checkstand to another. The
scanner reads the label while the items are moving by.
With presentation scanning, you simply present the
label to the scanner and then remove it. Do not move
the label past the scanner, but to the scanner.
Presentation scanning is particularly useful in a retail
environment where the number of items associated with
each transaction is normally small. There are three
simple steps to presentation scanning.
1 Move the bar code label to the scanner as shown in
Figure 4-2. As the package approaches the scanner,
the Item Detector senses the package. If the laser
light is off, it turns on to scan the bar code. The Item
Detector emits an invisible light through the corner
of the Scan Window. If you have a small item, be
sure to initially position it toward the corner of the
Scan Window so it can be detected by the item
detector.