Weighting Options - Hand Held Products 2D IMAGER 4800P User Manual

2. Enter the characters in order. For each character, look up the corresponding
hex value from the
Use the Programming Chart
scan the two symbols for each hex value.
3. Scan the Save bar code on the inside back cover.
Example: To program the modulo 11 check character from example #8 on
page
Character bar code on
in order:
After you enter all the desired hex values, scan the Save bar code 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 imager 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:
Then scan the string below:
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
8 - 10
ASCII Conversion Chart (Code Page
on the inside the back cover of this manual to
8-9, enable the OCR-A font. Scan the Enter OCR Check
3031323334353637383958
3-1-3-1 Weighted Modulo 10
Check Character
01234565
page 8-9, then scan the following hex values
dddddddc
4800p 2D Imager User's Guide
1252), page A-4.