ID Tech Ez One Shot User Manual page 82

Is the proper symbology enabled?
Each bar code symbology can be individually enabled or
disabled. It is suggested that you enable only those that you
will be scanning, thereby eliminating the possibility of mis
reads from the scanning of other symbologies.
Does the selected bar code symbology con guration match
the bar code(s) being read?
Scanned data from each bar code symbology can be restricted
to eliminate the scanning of unused symbologies.
The restrictions are individually set for each symbology.
POOR BAR CODE QUALITY
The third problem area has nothing to do with the scanner, but rather
the printed quality of the bar code and/or the scanning technique
employed.
TOLERANCE OF BAR CODE
A bar code may have a tolerance. Normally, the tolerances are
caused by bar code font software or a printer. Software with a
proven reputation should be chosen to generate bar codes. If the
printed bar codes are distorted, the scanner might not recognize
them.
It is very difficult to get a good read from a poor quality bar code
unless it is scanned many times. As the quality of the symbology
drops, the chances for undetected error increase. A bar code Check
Digit Verification (CDV) should be used to check the quality of
the suspect bar codes.
LABELS (PAPER & COLOR & PRINTER)
The light source of a bar code scanner is generally red, so there are
some restrictions for the printing of labels. Care should be taken
when choosing materials, especially color inks and papers.
Sometimes the combination of the label color and the color of
the ink can, in effect, blind the scanner. Media with a shiny surface
will also cause reading difficulties for scanners.
Moreover, poor printing quality can also result in reading difficulties
for the scanner. Bad printing may be caused by the type of printer
used; dot matrix and inkjet printers will not procedure high quality
bar codes. Also check to make sure the ink, ribbon, or toner in
good supply.
GROUP-66
TROUBLE SHOOTING