Argox AP-9800, Instructions Manual

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Warning
When the data transfer abnormal, Scanner will Send out a sound
for four consecutive sound tones, Please make sure cable is normal
under this issue.
Tips
* Make sure get one nice decoding result, Laser beam need aim at
code but any direction.
* Hold scanner in front of the code, press the tri gger, Make Laser
beam aim at code.
* Scanner more closed codes, The laser beam smaller. Scanner
more far away from the codes, The laser beam more bigger. If the
is small code, Scanner should be close to the code. If the is large
code, the scanner should be far from the bar code, which is the way
to easier to decoding bar code.
* If the bar code with highly reflective (For example, Coated
surface), Code will decoding successfully on one tilt scanning
angle.