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2. Enter the characters in order. For each character, look up the
corresponding hex value from the Code Page Mapping of Printed
Barcodes on page A-6. Use the Programming Chart on the inside the back
cover of this manual to scan the two symbols for each hex value.
3. Scan the Save barcode on the inside back cover.
Example: To program the modulo 11 check character from example #8 on
page 9-9, enable the OCR-A font. Scan the Enter OCR Check
Character barcode on page 9-9, then scan the following hex values
in order:
3031323334353637383958
After you enter all the desired hex values, scan the Save barcode on the
inside back cover of this manual.
Weighting Options
By default, the check character computation is unweighted. It is possible to use
one of two weighted modulo 10 schemes. Weighting is often used to detect if
two neighboring characters are transposed, a common error when an operator
keys in data.
3-1-3-1 Weighted Modulo 10 Check Character
Starting with the check character and working backward through the message,
the image scanner applies a multiplier of 1, then 3, then 1, then 3, and so on.
This is the checking scheme used in many EAN•UCC symbologies, including
U.P.C. and Interleaved 2 of 5 (when a check digit is invoked). To apply this
weighting scheme, set the OCR check character to “0123456789x3x1” or scan
the following symbol:
Example: Scan the 3-1-3-1 Weighted Modulo 10 Check Character symbol. Also
enter the OCR template:
dddddddc
Then scan the string below:
01234565
The reader performs the check character computation below:
(0 x 3 + 1 x 1 + 2 x 3 + 3 x 1 + 4 x 3 + 5 x 1 + 6 x 3 + 5 x 1) modulo 10 = 0
3-1-3-1 Weighted Modulo 10
Check Character