Download WT4070/90 Wearable Terminal Integrator Guide - PHF auto

A - 14 WT41N0 Integrator Guide
Table A-11
RS309 Decode Distances (Continued)
Symbol Density/
Bar Code Type/
W-N Ratio
Bar Code Content/
ContrastNote 1
Typical 30° Working
Ranges
Near
Far
Typical 42° Working
Ranges
Near
Far
20 mil
Code 39; 2.2:1
123
80% MRD
2.25 in.
5.72 cm
(Note 2)
41.50 in.
105 cm
2.00 in
5.08 cm
(Note 2)
41.50 in
105.41 cm
20 mil
Code 39; 2.2:1
123
25% MRD
2.25 in.
5.72 cm
(Note 2)
30.50 in.
77.5 cm
2.00 in
5.08 cm
(Note 2)
30.50 in
77.5 cm
40 mil
Code 39; 2.2:1
AB
80% MRD
4.00 in.
10.16 cm
(Note 2)
72.00 in.
182.88 cm
3.25 in
8.26 cm
(Note 2)
70.75 in
179.79 cm
55 mil
Code 39; 2.2:1
CD
80% MRD
5.75 in.
14.6 cm
(Note 2)
86.25 in.
233.05 cm
4.50 in
11.43 cm
(Note 2)
86.00 in
228.6 cm
Notes:
1. CONTRAST measured as Mean Reflective Difference (MRD) at 650 nm.
2. Near ranges on lower densities are largely dependent upon 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