KEYENCE BL-700 Series - Manual (Page 136)

Appendices
122
Appendices
Appendix A.2 Reading Range Characteristics (Typical)
■ BL-700/701
Unit: mm
Bar code type Narrow bar width Reading Max. readable
distance label width
A CODE39 0.15 205 to 275 210
B CODE39 0.19 190 to 300 254
C CODE39 0.25 175 to 325 275
D CODE39 0.5 160 to 370 310
E UPC/EAN1x 0.33 185 to 320 270
A
B
E
C
D
230
185 215 254 270 275 310 210
0 50 100 150 200 250 300 350 400
200
150
100
50
0
50
100
150
200
* For the reading distance measuring reference, see P.26.
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).
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°