26 HH492 User Guide
Example: 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 Barcode 1 
passes through the centering window, it will be read. Barcode 2 does not pass 
through the centering window, so it will not be read.
Note: A barcode 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.
Scan Centering On, then scan one of the following barcodes to change the top, 
bottom, left, or right of the centering window. Then scan the percent you want to 
shift the centering window using digits from the Programming Chart, beginning on 
page 133, then Save. Default Centering = 40% for Top and Left, 60% for Bottom 
and Right.
0
Barcode 1
Barcode 2
10 20 30 40 50 60 70 80 90 100%
100
90
80
70
60
50
40
30
20
10
0%