KEYENCE BL-700 Series - Manual (Page 137)

123
Appendices
Appendices
■ BL-740/741
Unit: mm
Bar code type Narrow bar width Reading Max. readable
distance label width
A CODE39 0.25 360 to 440 330
B CODE39 0.32 360 to 490 350
C CODE39 0.5 330 to 550 430
D CODE39 1 230 to 650 510
E UPC/EAN1x 1 time 150 to 750 600
Note 1: The readable label width means a bar code length including the right and
left margins (quiet zones) of a bar code.
Note: 2 Even if a bar code is within the above reading range, it may not be read
depending on the bar code quality. Set the optimum reading position based on
enough reading tests.
Note 3: Normally, the reading distance should be set to 230 mm (focal length). In
this case, the maximum readable label width is 215 mm (when the narrow bar
width is 0.19 mm or more).
E
360~440
A 360~490
B 330~550
C 230~650
D 150~750
400
300 340 330 350 430 510 600
0 100 200 300 400 500 600 700 800
300
200
100
0
100
200
300
Reading distance
(mm)
(Focal length)
Readable label width
(mm)
(Measuring conditions)
• The KEYENCE standard
bar code is used.
• Ratio of thin bar to thick
bar = 1:2.5
• Skew: 0°
• Pitch: 0°
• Tilt: 0°