Reading Bar Codes
•
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 ef-
fects occur when the reflection of the light from
the bar code becomes excessively strong. This
can easily happen when the reflecting 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 bar-code reading window.
**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 applica-
tion used, so follow the application's manual.
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 emits a laser light to scan
the bar code.
When the BHT has read the bar code successfully, the indicator LED will illu-
minate in green.
* The trigger switch function is
assigned to both of the M3 and
M4 keys by default.
Bar code scanning
range covered by
the laser light
Trigger switch
(M3 key)*
PW key
Trigger switch
(M4 key)*
Indicator LED
Max. 56 cm
(22.0")**
