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2-5
Installation
Calculating The Usable Scan Length Method
Usable scan length is calculated as follows (see Figure 2-3 on page 2-5):
L = 1.8 x (D+d) x Tan (A/2)
Where:
D = Distance (in inches) from the front edge of the housing to the bar code.
d = The housing’s internal optical path from the edge of the housing to the front
of the scanner.
A = Scan angle in degrees A° (see Technical Specifications table for each scan
engine model).
Note: Usable scan length determined by above formula, or 90% of scan
line at any working distance. The calculation given above is based
on good quality symbols in the center of the working range and
length of bar code.
Figure 2-3. Usable Scan Length Diagram
Scan Engine
Housing
d
D
A
Bar
Code
Summary of Contents for LS 1220
Page 2: ...LS 1220 Product Reference Guide ...
Page 3: ......
Page 4: ...LS 1220 Product Reference Guide 70 12072 03 Revision A January 2003 ...
Page 23: ...1 8 LS 1220 Product Reference Guide Figure 1 3 LS 1220 Connector ...
Page 33: ...2 10 LS 1220 Product Reference Guide ...
Page 71: ...8 14 LS 1220 Product Reference Guide Figure 8 1 Hardware Handshaking ...
Page 97: ...9 6 LS 1220 Product Reference Guide Code Lengths cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
Page 105: ...9 14 LS 1220 Product Reference Guide Prefix Suffix Values cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
Page 108: ...9 17 Parameter Menus UPC Security Zone cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
Page 120: ...9 29 Parameter Menus Intercharacter Delay cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
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