Scanning 3 - 7

Scanning Considerations
Scanning is a simple matter of aim, scan and decode. However, to optimize scanning perfor mance consider the
range and the scanning angle:
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Range
Any scanning device decodes well over a particular working range — mini mum and maximum distances from
the bar code. This range varies according to bar code density and scanning dev ice optics.
Scanning within range brings quick and constant decodes; scanning too close or to o far away prevents
decodes. Move the device closer and further away to find the right working ra nge for the bar codes being
scanned. However, the situation is complicated by the availability of various integrat ed scanning modules.
The best way to specify the appropriate working range per bar code density is through a chart called a
decode zone for each scan module. A decode zone simply plots working range as a fu nction of minimum
element widths of bar code symbols.
•
Angle
Scanning angle is important for promoting quick decodes. When laser beams re flect directly back into the
device from the bar code, this specular reflection can “blind” the device.
To avoid this, scan the bar code so that the beam does not bounce directly back. But don’t sc an at too sharp
an angle; the device needs to collect scattered reflections from the scan to ma ke a successful decode.
Practice quickly shows what tolerances to work within.
NOTE Contact Motorola Solutions Support if persistent scanning difficulties develop. Decoding properly printed
bar codes should be quick and effortless.
NOTE It is recommended that power is applied to the device while in Intellistand.