READING FEATURES
89
7
7.1.2 Advanced Code Reconstruction Reading Conditions
The following tables describe the minimum code height requirements (
in mm
) for standard
ACR4™ applications depending on the code symbology and the given reading conditions.
ANSI Grade B minimum
800
scans/sec
three code symbologies enabled simultaneously
uniform
background
2/5 Interleaved
Minimum Code Height for ACR4 Reading (mm)
45° max
30° max
Conveyor
Speed
(m/s)
0.5 1 1.5
2 2.5
3 0.5
1 1.5 2 2.5
3
0.25
12 15 18 21 23 26
8 11 13 15 17 19
0.30
14 16 19 22 25 28
9 11 14 16 18 20
0.33
15 17 20 23 26 29
10 12 14 16 19 21
0.38
16 19 22 24 27 30
11 13 15 17 20 22
0.50
20 22 25 28 31 34
13 15 17 19 22 24
0.72
26 29 32 35 37 40
17 19 21 23 25 28
Code Resolution
(mm)
1.00
35 37 40 43 46 49
21 24 26 28 30 33
Ratio 3:1
Table 1
Code 39
Minimum Code Height for ACR4 Reading (mm)
45° max
30° max
Conveyor
Speed
(m/s)
0.5 1 1.5
2 2.5
3 0.5
1 1.5 2 2.5
3
0.25
11 14 16 19 22 25
8 10 12 14 16 19
0.30
12 15 18 20 23 26
8 10 13 15 17 19
0.33
13 16 18 21 24 27
9 11 13 15 18 20
0.38
14 17 20 22 25 28
9 12 14 16 18 21
0.50
17 20 22 25 28 31
11 13 16 18 20 22
0.72
22 25 28 31 33 36
14 16 19 21 23 25
Code Resolution
(mm)
1.00
29 32 35 37 40 43
18 20 23 25 27 29
Ratio 3:1; Interdigit = Module Size
Table 2
Code 128 – EAN 128
Minimum Code Height for ACR4 Reading (mm)
45° max
30° max
Conveyor
Speed
(m/s)
0.5 1 1.5
2 2.5
3 0.5
1 1.5 2 2.5
3
0.25
9 12 15 18 21 23
7 9 11 13 16 18
0.30
10 13 16 19 22 24
7 9 12 14 16 18
0.33
11 14 16 19 22 25
8 10 12 14 17 19
0.38
12 15 17 20 23 26
8 10 13 15 17 19
0.50
14 17 20 22 25 28
9 12 14 16 18 21
0.72
18 21 24 27 29 32
12 14 16 19 21 23
Code Resolution
(mm)
1.00
24 26 29 32 35 38
15 17 19 22 24 26
Table 3
