Usable Scan Length - Symbol MINISCAN MSXX04 Integration Manual

Symbol MS3204-I000 2D Slab/Raster Decode Distances
Table 7-4
Symbol Density/
p/n / Bar Code Type
6.6 mil
64-14035-01
2D
10 mil
64-14037-01
2D
15 mil
64-14038-01
2D
55 mil
64-17458-01
1D
Notes:
1. Contrast measured as Mean Reflective Difference (MRD) at 650 nm.
2. Near ranges on largely depend on the width of the bar code and the scan angle.
3. Working range specifications: Photographic quality symbols, pitch = 15°, skew = 0°, roll = 0°,
ambient light < 150 ft. candles, and temperature = 23 °C, Vcc = 5V.
4. Measured from the front of the scanner.

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 Methodon page 2-8
scan angle is provided in
Typical Working Ranges
Bar Code Content/
1
Contrast
123 1.0 in.
80% MRD 2.54 cm
ABCDEF 3.5 in.
80% MRD 8.89 cm
012345678905 6.5 in.
80% MRD 16.51 cm
CD 1.0 in.
80% MRD 2.54 cm
Table 7-2 on page 7-5.
Symbol MS3204 Specifications 7 - 11
3
Near Far
5.25 in.
13.34 cm
9.5 in.
24.13 cm
14.0 in.
35.6 cm
32 in.
81.3 cm
describes how to calculate the usable scan length. The
Guaranteed Working
3
Ranges
Near Far
1.5 in. 3.75 in.
3.8 cm 9.5 cm
5.0 in. 7.5 in.
12.7 cm 9.5 cm
Note 2 11.0 in.
24.1 cm
Note 2 22.0 in.
55.9 cm