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Psion Teklogix 7530 G2 Hand-Held Computer User Manual 49
Chapter 3: Getting To Know Your 7530 G2
Scanning Techniques
• RFID: The RD7950 UHF RFID Reader is an EPC-compliant RFID reader
which can be integrated with laser bar code scanning or imaging (for
future release).
• Fuzzy Logic: reads damaged or low contrast regular 1D bar codes
(5 - 55mil) at medium distances (up to 1m).
• PDF Raster Laser: reads 2D PDF bar codes or regular 1D bar codes at short
to medium distances.
• 2D Imager: reads regular 1D and all 2D bar codes at short to medium distances.
• 1D Imager: reads regular 1D and PDF417 bar codes at short to
medium distances.
It is critical that you review the warnings listed under “Warning to Users” beginning
on page XI (at the beginning of this manual) before using any of the scanners
described in this chapter. “Scanning Techniques” outlines the mechanics of a
successful scan. In addition, review “Scan LED Indicators” on page 50 to better
understand how to interpret whether or not a bar code has been successfully scanned.
Finally, “Troubleshooting” on page 50 provides some helpful suggestions should the
scan fail.
3.6.1 Scanning Techniques
Note: The scanning techniques described here apply to internal and
external scanners.
• Hold the scanner at an angle. Do not hold it perpendicular to the bar code.
•Do not hold the scanner directly over the bar code. In this position, light
can reflect back into the scanner’s exit window and prevent a successful
decode.
• Scan the entire bar code. If you are using a 1D or 2D scanner, make certain
that the scan beam crosses every bar and space on the bar code, including
the margins on either end of the symbol.
• If you are using a 2D imaging scanner, make certain the red, oval-shaped
framing mark is centered within the bar code you want to scan.
• When using imaging scanners, do not move the scanner while decoding the
bar code. Movement blurs the image.
• Hold the scanner farther away for larger bar codes.
• Hold the scanner closer for bar codes with bars that are close together.