Scanning 1D Bar Codes; Scanning Considerations - Symbol PDT 3100 Series Product Reference Manual

Scanning 1D Bar Codes

To use the integrated scanner:
1. Aim the scanning element at the bar code and press the selected trigger.
2. Adjust the aim so that the thin, red laser beam covers the entire length of the bar
code.
Optimal scanning distance varies with bar code density and scanner optics, but
most combinations work within 4 to 10 inches. Generally:
• The larger the symbol, the farther away you should hold the scanner.
• Move the scanner closer for symbols with bars that are close together.
Simple practice quickly shows what distances to work within.
3. If the decode is successful, the screen displays the code and the green LED
flashes. The terminal may also beep.
Note: The procedure for your scanner may differ depending on the
application.

Scanning Considerations

Usually, scanning is a simple matter of aim, scan, and decode, and a few quick trial efforts
master it simply and intuitively. However, two important considerations can optimize any
scanning technique — angle and range.
Angle
Scanning angle is important for promoting quick decodes. When laser beams reflect
directly back into the scanner from the bar code, this specular reflection can actually "blind"
the scanner.
Right
Operating the PDT 3100
Wrong
4-15