Abbott CELL-DYN 3000, Руководство оператора

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CELL-DYN

3000 System Operator’s Manual
A-1
9140240E — May 1995
Appendix A
Bar Codes
Introduction To Bar Codes
This section gives a brief overview of what bar coding is, how bar code
labels are used for data entry and the different types of bar codes that
may be
used on the CELL-DYN® 3000 .
Bar coding is an automated method of gathering alphanumeric
information and transmitting it to a computer. Because it eliminates
typing and associated errors, bar coding offers speed, increased accuracy
and efficiency. The major elements in a bar coding system are:
• The computer and its software, which interpret and store bar code
data (for the CELL-DYN 3000, this is accomplished by the Data
Station and its software)
• The scanning device which “decodes” the information can be an
integrated reader such as the one in the Sample Loader of
CELL-DYN 3000SL Analyzers
• The printer (typically a high-resolution laser printer) for generating
bar code labels
• The bar code labels themselves
Bar Coding Function
The bar code label contains the actual identifying data in the form of a
series of black bars and contrasting white spaces, which represent
numbers and letters. The arrangement of the code follows one of several
sets of rules for bar code languages, called symbologies. To decode the
data in the label, a scanning device is used to pass a small spot of light
over the bars and spaces.
Since dark bars reflect little light back into the scanning device, while
white space reflects a lot of light, a light detector inside the scanner can
translate the differences in reflection into electrical signals. The signals
are then converted into sets of ones and zeros (the binary system used by
computers) which stand for numbers and letters.
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