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Chapter 11 Data Formats of Barcode Types
UPCA
11 numbers are transferred for the UPCA code. The 12. digit represents the
check number. The even figures of the information have a factor of "3", the
uneven figures a factor of "1". Counting begins from the l eft. The resulting
cross sum is divided by 10. The remaining figure is subtracted from the modu l
(10). If the remainder is "0", the check number is als o "0".
Example
For remainder “0” the check number is also “0”.
UPCE
For the UPCE barcode type, seven numbers are transmitted. Th e 8. digit is
the check number. The uneven figures of the information have a factor of "3",
the even figures a factor of "1". Counting begins from the left and the resulting
cross sum is divided by 10. The remaining inte ger value is subtracted from the
modul (10). The result is transmitted as the check number (c).
Example
For remainder “0” the check number is also “0”.
Information 401234567893
Factor 31313131313
Product 12+0+3+2+9+4+15+6+21+8+27
Cross sum 107
10 (modul) - 7 (remainder) = 3 (check number)
Information 01234565
Factor 3131313
Product 0+1+6+3+12+5+18
Cross sum 45
10 (modul) - 5 (remainder) = 5 (check number)