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• Modulus 11
a. Data characters are weighed from the right to the left, as, example,1, 2, ..., 10, 1, 2 ... 10, 1,
2 and so forth. The sum of the data character values is determined. (The symbol ‘-’ has a
character value of 10.)
b. A character having a character value equal to the remainder of dividing the value
determined in step a by 11 is the first check character (C).
c. Data characters are weighed from the right to the left, beginning with C, as, for example, 1,
2, ..., 9, 1, 2 ... , 9, 1, 2 and so forth. The sum of the data character values is determined.
d. The character with a character value equal to the remainder of dividing the value determined
in step c by 11 is the second check character (K).
• Modulus 16
a. The sum of the all characters including start and stop characters values is determined. The
following table shows the conversion of character into value.
Value Character Value Character Value Character Value Character
00 1 1 2 2 3 3
44 5 5 6 6 7 7
88 9 9 10- 11$
12 : 13 / 14 . 15 +
16 A 17 B 18 C 19 D
b. The remainder X of deviding the value determined in step a by 16 is determined. The
remainder Y of subtracting the remainder X from 16 is determined.
c. Convert the remainder Y into the character Z according to the conversion table in a. The
character Z is the check character.
• Modulus 43
a. The sum of the data character values is determined.
b. The character with a character value equal to the remainder of dividing the value
determined in step a by 43 is the check character.
9. Bar code and enlarged character