Usable Scan Length - Symbol MINISCAN MSXX04 Integration Manual

4 - 8 Symbol MiniScan MSXX04 Series Integration Guide
Symbol MS1204FZY Decode Distances (42
Table 4-3
Symbol Density/
p/n / Bar Code Type /
W-N Ratio
5.0 mil
64-17453-01
Code 39; 2.5:1
7.5 mil
64-17452-01
Code 39; 2.5:1
13 mil
64-05303-01
100% UPC
20 mil
60-01429-01
Code 39; 2.2:1
20 mil
60-02710-01
Code 39; 2.2:1
40 mil
64-17457-01
Code 39; 2.2:1
55 mil
64-17458-01
Code 39; 2.2:1
Notes:
1. Contrast measured as Mean Reflective Difference (MRD) at 650 nm.
2. Near ranges on lower densities largely depend on the width of the bar code and the scan angle.
3. Working range specifications: Photographic quality symbols, pitch = 10°, skew = 0°, roll = 0°,
ambient light < 150 ft. candles, and temperature = 23 °C.

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 Methodon page 2-8
scan angle is provided in
Typical Working Ranges
Bar Code Content/
1
Contrast
ABCDEFGH 3.25 in.
80% MRD 8.26 cm
ABCDEF 3.00 in.
80% MRD 7.62 cm
012345678905 2.20 in.
80% MRD 5.59 cm
123 1.00 in.
80% MRD 2.54 cm
(Note 2)
123 1.00 in.
25% MRD 2.54 cm
(Note 2)
AB 2.20 in.
80% MRD 5.59 cm
(Note 2)
CD 4.00 in.
80% MRD 10.16 cm
(Note 2)
Table 4-2 on page 4-5.
o
Scan Angle)
3
Near Far
7.00 in.
17.78 cm
12.50 in.
31.75 cm
25.75 in.
65.41 cm
34.00 in.
86.36 cm
27.25 in.
69.22 cm
66.75 in.
169.55 cm
75.00 in.
190.50 cm
describes how to calculate the usable scan length. The
Guaranteed Working
3
Ranges
Near Far
4.75 in. 5.25 in.
12.07 cm 13.34 cm
4.75 in. 9.00 in.
22.86 cm
12.07 cm
Note 2 19.00 in.
48.26 cm
Note 2 24.00 in.
60.96 cm
Note 2 22.00 in.
55.88 cm
Note 2 49.00 in.
124.46 cm
Note 2 55.00 in.
139.70 cm