Motorola SYMBOL MINISCAN MSXX04 - Manual (Page 102)

8 - 8 Symbol MiniScan MSXX04 Series 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 accuracy. Consider the width of the scan line at any given distance when designing a system.
Calculating the Usable Scan Length Method (Symbol MS954 Only)on page 2-9 describes how to calculate the
usable scan length. The scan angle is provided in the usable scan length diagram on page 2-9 .
Table 8-3 Symbol MS954 Decode Distances
Symbol Density/
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
90% MRD
0.7 in.
1.8 cm
7.3 in.
18.54 cm
1.6 in.
4.06 cm
4.8 in.
12.19 cm
7.5 mil
64-17452-01
Code 39; 2.5:1
ABCDEF
90% MRD
0.9 in.
2.29 cm
12.3 in.
31.24 cm
1.4 in.
3.56 cm
8.8 in.
22.35 cm
13 mil
64-05303-01
100% UPC
12345678905
90% MRD
0.9 in.
2.29 cm
22.0 in.
55.88 cm
1.1 in.
2.79 cm
15.7 in.
39.88 cm
20 mil
60-01429-01
Code 39; 2.2:1
123
90% MRD
Note 2 27.5 in.
69.85 cm
Note 2 22.0 in.
55.88 cm
40 mil
64-17457-01
Code 39; 2.2:1
AB
90% MRD
Note 2 28.0 in.
71.12 cm
Note 2 23.0 in.
58.42 cm
55 mil
64-17458-01
Code 39; 2.2:1
CD
90% MRD
Note 2 35.0 in.
88.90 cm
Note 2 29.0 in.
73.66 cm
Notes:
1. Contrast measured as Mean Reflective Difference (MRD) at 650 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), pitch=15°, roll=0°, skew=0°,
photographic quality, ambient light<200 ft-c.