1.1 Reading Bar Codes
Turn on the BHT power, bring the
When the BHT has read the bar code successfully, the indicator LED will illuminate in green.
Bar code scanning range covered by the laser light
Indicator LED
Trigger switch (M4 key)*
Max. 56 cm 
(22.0")**
Trigger switch (M3 key)*
PW 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.)
¥Keep the BHT at a distance from a target bar code so that the bar code comes within approx. 90% of the laser scanning range (line length).
¥The BHT can read bar codes at a maximum distance of 56 cm (22.0")** from the
**Under the following conditions:
-Ambient illuminance: 500 
x (Xenon lamp)
-Code 39
-Reflection intensity: 85% min. for white and 5% max. for black
-Minimum narrow bar width: 1.4 mm min. (55.1 mils min.)
¥The bar code reading procedure may differ depending upon the application used, so follow the application's manual.
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