Allen-Bradley 2755-HDG-4 User Manual page 46

UPC / EAN Decode Security Levels
There are four levels of decode security. There is an inverse relationship
between security and the ability to decode codes of varying quality.
Increasing the security level, "tightens" the scanner's requirements for a
valid read. Select one of the levels below.
The default security level is 0. This level is sufficient for most
applications. Higher security levels:
•
may result in more no-reads on poor quality labels
•
reduce the chance of mis-reads on poor quality labels
Security Level
0
1
2
3
At the level 0, the scanner decodes many poor or low quality codes while
providing adequate security for UPC/EAN codes within specifications.
As the quality level of UPC / EAN bar codes decrease, certain digits are
more susceptible to misreads ( 1, 2, 7, 8) If you have problems only
decoding symbols with these digits, select this security level.
If you are having problems decoding poor quality bar codes and the
problem isn't limited to the digits ( 1, 2, 7, 8), select this level.
If you selected security level 2 and are still having problems decoding
symbols, select this security level.
Note: Only select this level if you are scanning high quality bar codes. The
scanner will reject codes that are not within the specifications for the
symbology.
Configuring the Scanner
Decode Operation
3–7
Publication 2755-6.2