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1.1 Reading Bar Codes
Turn on the BHT power, bring the bar-code reading window to the bar code to be
scanned, and press the trigger switch. The BHT turns on the illumination LED and
reads the bar code. Keep the BHT in a position where the bar code lies within the
illumination range.
When the BHT has read the bar code successfully, the indicator LED will illuminate in
green.
Trigger switch (M3 key)*
* The trigger switch function is
assigned to both of the M3 and
M4 keys by default.)
• If the BHT fails to read due to specular effects or other
factors, change the scanning angle of the reading win-
dow or the distance from codes as shown at right, and
try it again. (Specular effects occur when the reflec-
tion of the light from the bar code becomes exces-
sively strong. This can easily happen when the re-
flecting surface is polished or covered with vinyl.)
• The BHT can read bar codes at a maximum distance of 40 cm (15.7")** from the
bar-code reading window. (**For details about the scanning conditions, refer to
Appendix A.)
• The bar code reading procedure may differ depending upon the application
used, so follow the application's manual.
• Before reading bar codes, clean those labels if stained.
• Avoid using the BHT in direct sunlight. The BHT might fail to read correctly.
• To read bar codes on curved surfaces, align the center of the reading window with
that of the target bar code.
• When you pull the bar-code reading window away from the bar codes, the actual
scanning range will become narrower than the range covered by the illumination
LED.
• The light intensity of the illumination LED will vary depending upon the scanning
conditions and variation of their elements.
Illumination range
Max. 40 cm
(15.7")**
PW key
Indicator LED
(Illuminates in green when
the BHT has read the bar
code successfully.)
Trigger switch
(M4 key)*
2
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