JANUS? 2020 Hand-Held Computer (4MB) - Intermec

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nuggetTYTR TYTRLeaning How to Use the Reader
To successfully read a bar code label, the laser beam must see all the bars in
a label and a “quiet zone” at each end of the label. A quiet zone is a clean,
non-printed space.
*NANCY*
Quiet zone before and
after bar code
2020U.142
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With either the standard or long-range scanner, you will have the best success
if you hold the reader so that the horizontal reading angle is near zero and the
vertical reading angle is near 20 degrees. Optimum angles vary with the type
and printing quality of the bar code label, the distance of the reader from the
label, and the lighting of the work area.
Note: You should not scan the bar code label “straight on.” In a 2-degree conical
“dead zone” directly above the label, the laser beam may reflect back into the scanner
window and prevent the reader from reading the label.
Laser Scanner Options
You can set several configuration command parameters to configure the laser
scanner to meet your needs. The parameters available are:
Decode Security Defines the security level to use when decoding bar codes.
When you select a lower decode security level, the reader can decode bar codes
with poorer print quality.
Scan Ahead Allows you to scan a number of bar code labels at one time. The
labels are held in a stack until the reader can process the data.
Scanner Mode Defines how the scanner operates when the trigger is pulled. In
One-Shot mode, the laser turns on and stays on until you release the trigger or
a label is decoded. In Automatic mode, you can continuously scan bar code
labels without having to release the trigger between labels.
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