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DCA Vantage Operator’s Guide 151
External Barcode
Reader
• Code 39 with optional check digit required
• Code 128 standard includes check digit
• Coda Bar without check digit
The following rules apply to data entered by the external barcode reader:
•
DCA Vantage can read and display full ASCII character set.
• You can enter and display characters in lower case.
• Search to recall samples associated with the data entered by the external
barcodes are not case sensitive.
• The DCA Vantage system serial number entry is supported in Code 128
intended for manufacturing entry.
The barcode symbols, and the labels themselves, must meet certain
specifications, detailed below:
Number of Characters:
1 to 30 data characters. A maximum of 13 characters
can be displayed, stored, and transmitted by the DCA Vantage system.
Remove excess characters as leading or trailing characters.
Narrow Bar Width:
0.15 to 0.51 mm (0.006 to 0.02 in). It is better to be closer
to the upper limit (0.51 mm/0.02 in), as long as the entire barcode can be
contained within the maximum length.
This measurement effects both the symbol length and how far away from the
label you can hold the handheld reader. If the narrow bar width is at the
minimum, the symbol length can be no greater than 90 mm (3.5 in), including
quiet zones, and the reader can be held no more than 75 mm (3 in) away.
Narrow to Wide Ratio:
Must be within the specifications for the format being
used. This is generally 2.0 to 3.0.
Symbol Length:
Variable. See Narrow Bar Width for more information.
Quiet Zone:
Minimum of 10 times the narrow bar width at each end of the
symbol.
Symbol Height:
Minimum of 10 mm (0.40 in).
Total Size of Label:
May be greater than the size of the symbol to allow for
printing of human readable information. Printing of the specimen ID number
in alphanumeric digits is strongly recommended.
Symbol grade:
Minimum grade of “C” as defined by ANSI X3.182-1990
(available from American National Standards Institute, 1430 Broadway, New
York, NY 10018).
Wavelength of Light:
630 nm (visible red LED).