14-7
Strange Behavior
•
Low batteries that are not detected can exhibit some bizarre
TriCoder symptoms, including laser beams that shut off,
continuous beeping, shutting off when you scan, etc. Try the
power supply. Try new batteries. Be sure if you are using NiCad
or NiMH rechargeable batteries, you have the
Speaker/Batteries
set to
3
and not
2
.
The TriCoder won’t read your bar codes…
•
Recheck all hardware connections using
Chapter 5
;
TriCoder
Connection
as a guide. Try reading a bar code you know is valid and
readable – try the Test Label in
Chapter 3
;
Non Portable Mode
.
•
If you are reading Code 39 bar codes with leading spaces (see the
Barpad in
Appendix H
; Code 39, Accumulate Mode
)
and
you have
enabled
Accumulate Mode
in the setup, the reader will beep twice
upon reading a bar code and will not transmit data to the computer
until it reads a bar code
without
a leading space.
•
Recheck the TriCoder setup and make sure you have
enabled
the
bar code type you are trying to read.
•
If you are having problems reading
Interleaved 2 of 5
codes, make
sure the data length of the bar code is the same as the
2 of 5
Length
set on the TriCoder.
•
Make sure you have not enabled
check digits
for Code 39 or
Interleaved 2 of 5 if your bar codes do not have check digits.
•
Make sure the scanner is plugged into the SCANNER port and
not
the COMPUTER port.
The TriCoder transmits extra characters at the start or
end of bar code data…
•
Clear the
preamble
and
postamble
.
•
Check to make sure you have not setup the TriCoder to transmit
start/stop characters, check digits, NSC characters or terminator
characters
that you don’t want transmitted.
•
For
UPC-E
, select
Compressed
transmission if you don’t want
your data padded out with extra zeroes.
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