Denso WAVE BHT-805BWB User Manual page 43

When unable to successfully read barcodes...
Cause
When the illumination LED is focused on
the printed surface of the barcode from
Specular
directly above, there are times when
reflection
scanning may be unsuccessful due to
specular reflection.
Scanning may be unsuccessful if the BHT is
Distance from
too close to a bar code that is wider than the
barcode
reading window.
Barcode surface Scanning may be unsuccessful if the
curvature barcode surface is curved.
Barcode surface Scanning may be unsuccessful if the
dirt barcode surface is dirty.
Barcode reading Scanning may be unsuccessful if the
window dirt barcode reading window is dirty.
Barcode scanning may be adversely
Direct sunlight,
affected
ambient light
brightness of the surrounding light.
by direct sunlight or the
Barcode Handy Terminal
Countermeasure
Change the BHT scanning angle and try again.
Move the BHT slowly away from the barcode and try again.
Bar code reading is possible from a maximum distance* of 62
cm.
* Under the following conditions:
•
Ambient illuminance: 500Lux(fluorescent lamp)
•
ITF conforming to the UPC Shipping Container Code
•
PCS value: 0.9 or more
•
Minimum narrow bar width: 1.2 mm min.
Scan the barcode at the center of the barcode reading
window.
Wipe the dirt from the barcode and try again.
Blow any dust away with an airbrush, and then gently
wipe the reading window with a cotton swab or similar soft
object.
Perform barcode scanning away from direct sunlight. Try
adjusting the brightness of the surrounding light when
scanning indoors.
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