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Usable scan length, Usable scan length -11 – Motorola SYMBOL MINISCAN MSXX04 User Manual

Page 93

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Symbol MS3204 Specifications 7 - 11

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

describes how to calculate the usable scan length. The

scan angle is provided in

Table 7-2 on page 7-5

.

Table 7-4

Symbol MS3204-I000 2D Slab/Raster Decode Distances

Symbol Density/

p/n / Bar Code Type

Bar Code Content/

Contrast

1

Typical Working Ranges

3

Guaranteed Working

Ranges

3

Near

Far

Near

Far

6.6 mil

64-14035-01

2D

123

80% MRD

1.0 in.

2.54 cm

5.25 in.

13.34 cm

1.5 in.

3.8 cm

3.75 in.

9.5 cm

10 mil

64-14037-01

2D

ABCDEF

80% MRD

3.5 in.

8.89 cm

9.5 in.

24.13 cm

5.0 in.

12.7 cm

7.5 in.

9.5 cm

15 mil

64-14038-01

2D

012345678905

80% MRD

6.5 in.

16.51 cm

14.0 in.

35.6 cm

Note 2

11.0 in.

24.1 cm

55 mil

64-17458-01

1D

CD

80% MRD

1.0 in.

2.54 cm

32 in.

81.3 cm

Note 2

22.0 in.

55.9 cm

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.