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MS-220X Decode Zones
The decode zone is a function of various symbol characteristics including density, print
contrast, wide to narrow ratio and edge acurity. Typical values are shown.
page 5-10
and
Table 5-5 on page 5-12
bar code densities. The minimum element width (or "symbol density") is the width in mils of
the narrowest element (bar or space) in the symbol. The maximum usable length of a
symbol at any given range is shown below. To calculate this distance, see
Usable Scan Length Method
MS-220X 1D Decode Zone
Note: Typical performance at 68˚F (20˚C)
on high quality symbols in normal room light.
Vcc = 5V
MS 22XX
6 mil
2.0
7.5 mil
1.5
13 mil Minimum Element Width
20 mil Minimum Element Width
*
0
In.
cm
0
12.7
* Minimum distance determined by symbol length and scan angle.
list the typical and guaranteed distances for selected
on page 2-14.
5.25
7.0
14.0
40 mil Minimum Element Width
55 mil Minimum Element Width
5
10
15
25.4
38.1
Depth of Field
Figure 5-4. MS-220X 1D Decode Distances
19.0
24.0
20
25
30
50.8
63.5
76.2
MS-220X Specifications
Table 5-4 on
Calculating The
In.
cm
10 25.4
15.2
7.5
5
10.1
2.5
5.1
0
0
2.5
5.1
5
10.1
7.5
15.2
10
25.4
31.0
35
88.9
W
i
d
t
h
o
f
F
i
e
l
d
5-9
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