Hold At An Angle - Symbol P370 Product Reference Manual

Right

Hold at an Angle

Do not hold the scanner directly over the bar code. Laser light reflecting directly back into
the scanner from the bar code is known as specular reflection. This strong light can "blind"
the scanner and make decoding difficult. The area where specular reflection occurs is
known as a "dead zone."
You can tilt the scanner up to 65° forward or back and still achieve a successful decode.
Simple practice quickly shows what tolerances to work within.
65
Scan
Beam
Bar Code
Figure 3-2. Maximum Tilt Angles and Dead Zone
Wrong
Shaded area represents
+ _
dead zone ( 2 )
Bar Code
Bar Code
Operation
65
Scan
Beam
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