Symbol MiniScan MS-120X, Integration Manual

Page: 56 / 410

3-8
MS-120X and MS-220X Integration Guide
Usable Scan Length
The decode zone is a function of various symbol characteristics including density, print
contrast, wide-to-narrow ratio, and edge acuity. Consider width of decode zone at any given
distance when designing a system.
Calculating The Usable Scan Length Method on page 2-14 describes how to calculate the
usable scan length. The scan angle is provided in Table 3-2 on page 3-4 .
Table 3-3. MS-1207WA Decode Distances
Symbol Density/
Symbol p/n /
Bar Code Type/
W-N Ratio
Bar Code
Content/
Contrast
1
Typical Working
Ranges
Guaranteed Working
Ranges
Near Far Near Far
5 mil
64-17453-01
Code 39; 2.5:1
ABCDEFGH
80% MRD
1.0 in.
2.54 cm
4.0 in.
10.16 cm
1.2 in.
3.05 cm
3.0 in.
7.62 cm
7.5 mil
64-17452-01
Code 39; 2.5:1
ABCDEF
80% MRD
0.6 in.
1.52 cm
7.2 in.
18.29 cm
0.9 in.
2.29 cm
6.0 in.
15.24 cm
13 mil
64-05303-01
100% UPC
1234567890
80% MRD
0.6 in.
1.52 cm
11.0 in.
27.94 cm
0.9 in.
2.29 cm
9.0 in.
22.86 cm
20 mil
60-01429-01
Code 39; 2.2:1
123
80% MRD Note 2
15.0 in.
38.10 cm
Note 2
13.0 in.
33.02 cm
40 mil
64-17457-01
Code 39; 2.2:1
AB
80% MRD Note 2
19.0 in.
48.26 cm
Note 2
17.0 in.
43.18 cm
55 mil
64-17458-01
Code 39; 2.2:1
CD
80% MRD Note 2
24.0 in.
60.96 cm
Note 2
22.0 in.
55.88 cm
1. CONTRAST measured as Mean Reflective Difference (MRD) at 670 nm.
2. Near ranges on lower densities (not specified) largely depend on the width of the bar code
and the scan angle.
3. Working range specifications at ambient temperature 23 °C.