9. Bar code and enlarged character
• 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
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 |
0 | 0 | 1 | 1 | 2 | 2 | 3 | 3 |
4 | 4 | 5 | 5 | 6 | 6 | 7 | 7 |
8 | 8 | 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.
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