Chapter 1 Quick Guide
3
•
If the BHT fails to read due to specular effects or other factors, change the
scanning angle of the reading window or the distance from codes as shown
at right, and try it again. (Specular effects occur when the reflection of the
light from the code becomes excessively strong. This can easily happen
when the illumination LED lights codes perpendicularly or due to the angle of
ambient intense lighting to codes.)
•
The actual scanning range is narrower than the marker range. The scanning range is approx. 2.4" (6 cm)
wide by 1.6" (4 cm) high when the scanning distance is approx. 3.9" (10 cm).
•
Allow only a single code to come within the scanning range. If two or more codes lie within the scanning
range at the same time, the scanner may fail to read or continue reading those codes alternately.
•
The scanner can read codes omnidirectionally. Note that a target code plus its margin should lie within the
scanning range.
•
The marker range should be used merely as a guide. It does not assure that a code within the marker range
can be read.
•
The code reading procedure may differ depending upon the application used, so follow the application’s
manual.
• Before reading labels, clean them if stained.
• Avoid using the BHT in direct sunlight. The BHT might fail to read correctly.
• To read codes on curved surfaces, apply the reading window to the center of each code at a right
angle.
The light intensity of the marker or illumination LED will vary depending upon the scanning
conditions and variation of its elements.
Summary of Contents for BHT-202QW-CE
Page 1: ...BHT 202Q 202QW CE...
Page 148: ...Chapter 4 Error Messages 135...
