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Chapter 2
32
Barcodes are symbols consisting of a series of bars and spaces which can
be applied to packages, cartons, bottles, and other commercial products.
The bars and spaces in each symbol are grouped in such a way to
represent a specific ASCII character or function. The interpretation of
these groups is based on a particular set of rules called symbologies.
Various symbologies have been developed for particular applications.
Some examples are shipping and receiving, manufacturing, retail,
healthcare, transportation, document processing and tracking, and
libraries.
The resolution of a barcode is dependent on the narrowest element of a
barcode (X dimension), and can vary from high density (nominally less
than 0.009 in./0.23 mm), medium density (between 0.009 in./0.23 mm and
0.020 in./0.50 mm), and low density (greater than 0.020 in./0.50 mm).
Medium and low densities are the most common since these are the
easiest to read (scan) with nearly all scanning devices. The scanner can
read barcodes with X-dimensions as low as 5 mils (0.005 in/0.13mm).
WCS3900 Series Scanners can read the most popular barcode
symbologies including Code 39, Code 93, Code 128, Interleaved 2 of 5,
UPC-A, UPC-E, EAN/JAN-8, EAN/JAN-13, Codabar, and MSI/Plessey.
Please see test chart on pages 29-31.
Barcode Symbologies
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