Vuquest 3320g User Guide 49
Centering
Use Centering to narrow the scanner’s field of view to make sure that when the
scanner is hand-held, it reads only those bar codes intended by the user. For
instance, if multiple codes are placed closely together, centering will insure that
only the desired codes are read. (Centering can be used in conjunction with Aimer
Delay, page 48, for the most error-free operation in applications where multiple
codes are spaced closely together. Using the Aimer Delay and Centering features,
the scanner can emulate the operation of older systems, such as linear laser bar
code scanners.)
Note: To adjust centering when the scanner is in Presentation Mode, see Presentation
Centering (page 3-40).
If a bar code is not touched by a predefined window, it will not be decoded or output
by the scanner. If Centering On is checked, the scanner only reads codes that pass
through the centering window you specify using the Top of Centering Window, Bot-
tom of Centering Window, Left, and Right of Centering Window selections.
In the example below, the white box is the centering window. The centering window
has been set to 20% left, 30% right, 8% top, and 25% bottom. Since Bar Code 1
passes through the centering window, it will be read. Bar Code 2 does not pass
through the centering window, so it will not be read.
Note: A bar code needs only to be touched by the centering window in order to be read. It
does not need to pass completely through the centering window.
0
Bar Code 1
Bar Code 2
10 20 30 40 50 60 70 80 90 100%
100
90
80
70
60
50
40
30
20
10
0%
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