SYSMEX SF-3000 - Page 588

TECHNICAL INFORMATION, ID Bar Code, Check Digit
C-22 Sysmex SF-3000 Operator's Manual -- Revised September 1995
(B) Modulus 11
This Modulus 11 method is used in the bar code symbology such as CODE-11, NW-7
and CODABAR. Check digit computation method is shown as follows:
The following example uses the ID number 15-2345-6789.
(1) Weight is multiplied to each digit as:
ID Number
Weight
1
x
3
5
x
2
-
x
1
2
x
10
3
x
9
4
x
8
5
x
7
-
x
6
6
x
5
7
x
4
8
x
3
9
x
2
3 10 0 20 27 32 35 0 30 28 24 18
The weight of the ID number is 3, 2, 1, .... 6, 5, 4, 3, 2 is applied to each one from the
least significant to the most significant digit. The position of the check-digit is in the
least significant digit of the ID number and its weight is 1.
(2) Add each product as given below:
Sum = 3+10+0+20+27+32+35+0+30+28+24+18 = 227
(3) Divide the sum by 11 and get the remainder. Then subtract the remainder from 11.
The result will be the check-digit.
227/11 = 20; remainder = 7,
11-7 = 4,
Hence the check-digit is 4.
Note that all symbols except the numbers are calculated as zero(0). The check-digit
will be zero (0) when the resulted check-digit is 10 or 11.
(4) This check digit is appended to the ID number;
the bar code label is now 15-2345-67894.
(5) When the ID Reader reads this bar code label, the instrument computes the check-
digit(s) and recognizes the read as a valid read if the remainder is 0 or 1.