SECTION 3
Scanner Specifications
SE 1223 Scanner User’s Guide 3-3
SE 1223 Standard Scanner Decode Zone
The standard SE 1223 scanner decodes the symbols as de-
scribed in Table 3-2. The numbers shown are typical values
as well as guaranteed values. The minimum element width
(or symbol density) is the width in mils of the narrowest
element (bar or space) in the symbol.
Table 3-2
SE 1223 Standard Scanner Decode Distances
Typical
Guaranteed
Symbol Density
Minimum
Maximum
Minimum
Maximum
In.
mm
In.
cm
In.
cm
In.
cm
In.
cm
0.005
0.127 3
7.62
6
15.24 3
7.62
5
12.7
0.0075
0.191 2.5
6.35
10
25.4
2.75
6.98
9
22.86
0.010
0.254 2
5.08
15
38.1
2.5
6.35
13
33.02
0.015
0.381 2
5.08
20
50.8
2.5
6.35
19
48.26
0.020
0.508
*
29
73.66
*
21
53.34
0.040
1.01
*
40
101.6
*
30
76.2
0.010
0.254
*
45
114.3
*
36
91.44
* Minimum distance determined by symbol length and scan
angle.
The decode zone is a function of various symbol characteris-
tics including density, print contrast, wide-to-narrow ratio,
and edge acuity. Width of decode zone at any given distance
must be considered when designing a system.
Usable scan length is calculated as follows:
L = 1.8 x (D + d) x Tan (A/2)
Where:
D = Distance (in inches) from the front edge of the
housing.
Summary of Contents for SE1223
Page 1: ...SE 1223 Integrated VLD Scanner USER S GUIDE PN 961 032 042 Revision B September 1999...
Page 8: ...CONTENTS vi SE 1223 Scanner User s Guide...
Page 22: ...SECTION 1 General Information 1 14 SE 1223 Scanner User s Guide...
Page 124: ...SECTION 3 Scanner Specifications 3 14 SE 1223 Scanner User s Guide...
