C2R Colibri 5 Series, User Manual

Page: 113 / 168

Colibri serie 5 : User’s guide
© 2000-2008 C2R Technologie, Sarl. All rights reserved
113
Rev. C
The imager performs the following check character computation:
(6 + 5 + 1 + 2 +3 + 5 + 1 + X) modulo 11 = 0
Since the result is zero, the message is considered to be valid, so the reader outputs the
message: 6512351
Programming a User-Defined Check Character
1. Scan the
Enter OCR Check Character barcode, below.
Enter OCR Check Character
2. Enter the characters in order. For each character, look up the corresponding hex value
from the ASCII Conversion Chart (Code Page 1252), page 157. 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 113, enable the
OCR-A font. Scan the Enter OCR Check Character barcode on page 111, 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 un weighted. 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:
3-1-3-1 Weighted Modulo 10 Check Character
Example: Scan the 3-1-3-1 Weighted Modulo 10
Check Character symbol. Also enter the OCR template: dddddddc Then scan the string below: