Reference Guide

OCR Programming
349
multiplier, resulting in a product for each character in the scanned data. The sum of these products is
computed. The check digit passes if this sum modulo Check Digit Modulus is zero.
Example:
Scanned data numeric value is 132459 (check digit is 9)
Check digit multiplier string is 123456
Digit 1 3 2 4 5 9
Multiplier 6 5 4 3 2 1
Product 6 15 8 12 10 9
Product add 6+ 15+ 8+ 12+ 10+ 9= 60
The Check Digit Modulus is 10. It passes because 60 is divisible by 10 (the remainder is 0).
Digit Add Left to Right
Each character in the scanned data is assigned a numeric value (see <bl_blue><em_Emphasis>OCR
Check Digit Multiplier on page 17-346). Each value representing a character in the scanned data is
multiplied by its corresponding digit in the multiplier, resulting in a product for each character in the
scanned data. The sum of each individual digit in all of the products is then calculated. The check digit
passes if this sum modulo Check Digit Modulus is zero.
Example:
Scanned data numeric value is 132456 (check digit is 6)
Check digit multiplier string is 123456
Digit 1 3 2 4 5 6
Multiplier 1 2 3 4 5 6
Product 1 6 6 16 25 36
Digit add 1+ 6+ 6+ 1+6+ 2+5+ 3+6= 36
The Check Digit Modulus is 12. It passes because 36 is divisible by 12 (the remainder is 0).
Product Add Right to Left
(1)
Digit Add Left to Right
(4)
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