Table of Contents
Advertisement
SDSC 3M
Symbol
Bar Code
Density/ Bar
Content/
Code Type/ W-
Contrast
N Ratio
4.0 mil
ABCDEFGH
Code 39; 2.5:1
80% MRD
5.0 mil
ABCDEFGH
Code 39; 2.5:1
80% MRD
7.5 mil
ABCDEF
Code 39; 2.5:1
80% MRD
10 mil
ABCDE
Code 39; 2.5:1
90% MRD
13 mil
12345678905
100% UPC
90% MRD
15 mil
ABCD
Code 39; 2.5:1
80% MRD
20 mil
Code 39; 2.2:1
80% MRD
40 mil
Code 39; 2.2:1
80% MRD
55 mil
Code 39; 2.2:1
80% MRD
Notes:
1.
CONTRAST measured as Mean Reflective Difference (MRD) at 650 nm.
2.
Near ranges on lower densities (not specified) are largely dependent upon
the width of the bar code and the scan angle.
3.
Working range specifications at ambient temperature (23°C),
Photographic quality symbols. pitch=10°, roll=0°, skew=0°, ambient light <
150 ft-candles.
4.
X - Dependent on width of bar code.
5.
Distances measured from front edge of chassis.
Typical Working
Ranges
Note 1
Near
1.00 in
2.50 cm
1.25 in
3.18 cm
1.50 in
3.81 cm
1.50 in
3.81 cm
1.50 in
3.81 cm
1.50 in
3.81 cm
123
1.75 in
4.45 cm
AB
X
CD
X
A
PPENDIX
Guaranteed
Working Ranges
Far
Near
5.50 in
2.20 in
13.97 cm
5.59 cm
8.00 in
2.20 in
20.32 cm
5.59 cm
13.00 in
2.00 in
33.02 cm
5.08 cm
18.00 in
1.75 in
45.72 cm
4.45 cm
24.00 in
1.75 in
60.96 cm
4.45 cm
25.00 in
1.75 in
63.50 cm
4.45 cm
29.00 in
X
73.66 cm
31.00 in
X
78.74 cm
35.00 in
X
88.90 cm
D: D
Z
| 45
ECODE
ONE
Far
3.20 in
8.13 cm
5.50 in
13.97 cm
9.00 in
22.86 cm
13.00 in
33.02 cm
17.00 in
43.18 cm
18.00 in
45.72 cm
19.00 in
48.26 cm
21.00 in
53.34cm
25.00 in
63.50 cm
Advertisement
Table of Contents
