TECHNICAL INFORMATION, ID Bar Code, Check Digit
C-26 Sysmex SF-3000 Operator's Manual -- Revised September 1995
(F) Modulus 103
Modulus 103 is the check-digit computation method used in the CODE-128 symbology.
CODE-128 takes three different character table depending on the start code. Each of 128
characters is assigned a value as shown in the following table. All characters are then
converted to their corresponding values and computed.
(1) All characters except the stop code are converted to their corresponding values
according to the table.
(2) The first character, such as "Start (Code A)", indicates that the Code A set is used
until other code set is specified. Multiply the most significant digit by 1, multiply
the second digit by 2, multiply the third digit by 3, and so on.
(3) Add all the products.
(4) Divide the sum by 103.
(5) Convert the remainder to the corresponding character in the table. This is the
check-digit.
The following example uses the ID number Start (Code A) 123-4567.
(1) Convert each character into values using Code A set, and multiply by the weight.
Start (Code A) 103 = 103
1 17 x 1 = 17
2 18 x 2 = 36
3 19 x 3 = 57
- 13 x 4 = 52
4 20 x 5 = 100
5 21 x 6 = 126
6 22 x 7 = 154
7 23 x 8 = 184
(2) The sum of the products is 829.
(3) This sum is divided by 103 as; 829/103 = 8 and remainder is 5.
(4) The corresponding character for the value 5 is %. Hence the check-digit is %.
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