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RS485:
Reading Techniques
The view finder projects an aiming
beam that should be centered over the
bar code, but it can be positioned in any
direction for a good read.
Hold the scanner over the bar code,
press the button, and center the aiming
beam on the bar code.
The aiming beam is smaller when the
scanner is closer to the code and larger
when it is farther from the code. Hold
the scanner close to smaller bar codes,
and farther away from large bar codes
to get a proper read.