Symbol P 370 RF, Reference Manual

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3-4
P 370/470 RF Scanner Product Reference Guide
Scan the Entire Symbol
!
Your scan beam must cross every bar and space on the symbol.
!
The larger the symbol, the farther away you should hold the scanner.
!
Hold the scanner closer for symbols with bars that are close together.
!
A short, high tone beep indicates a good decode.
Right Wrong
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.
Figure 3-2. Maximum Tilt Angles and Dead Zone
65
°
65
°
Scan
Beam
Scan
Beam
Bar Code Bar Code
Bar Code
Shaded area represents
dead zone (
±
2
°
)