Symbol MiniScan MS-804FZY, Руководство по интеграции

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4-6
MS-804FZY and MS-904HS Integration Guide
MS-904HS Decode Zone
The figures shown are typical values. Table 4-3 on page 4-7 lists the typical and guaranteed
distances for selected 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
Calculating The Usable Scan Length Method on page 2-10.
Figure 4-3. MS-904HS Decode Zone (Typical)
in.
cm
MS 904HS
5 mil
1.0
0.5
3.5
7.5 mil
10 mil
6.0
7.5
100% UPC
10.5
16.0
21.0
20 mil
40 mil
23.0
*
55 mil
*Minimum distance determined by symbol length and scan angle
in. cm
W
i
d
t
h
o
f
F
i
e
l
d
Depth of Field
Note: Typical performance at 73.4˚F (23˚C)
on high quality symbols.
0
0 5
12.7
10
25.4
15
38.1
20
50.8
1.0
0
2
4
6
2
4
6
0
5.1
10.2
15.2
8
20.3
5.1
10.2
15.2
8
20.3
1.0