15 - 26 DS8178 Digital Scanner Product Reference Guide
OCR Check Digit Multiplier
Parameter # 700
SSI # F1h BCh
This option sets OCR check digit multipliers for character positions. For check digit validation, each character in
scanned data has an assigned weight to use in calculating the check digit. The scanner OCR ships with the
following weight equivalents:
0 = 0 A = 10 K = 20 U = 30
1 = 1 B = 11 L = 21 V = 31
2 = 2 C = 12 M = 22 W = 32
3 = 3 D = 13 N = 23 X = 33
4 = 4 E = 14 O = 24 Y = 34
5 = 5 F = 15 P = 25 Z = 35
6 = 6 G = 16 Q = 26 Space = 0
7 = 7 H = 17 R = 27
8 = 8 I = 18 S = 28
9 = 9 J = 19 T = 29
All other characters are equivalent to one (1).
You can define the multiplier string if it is different from the default.
121212121212 (default)
123456789A (for ISBN, Product Add Right to Left. See OCR Check Digit Validation on page 15-27)
For example:
ISBN 0 2 0 1 1 8 3 9 9 4
Multiplier 10 9 8 7 6 5 4 3 2 1
Product 0 18 0 7 6 40 12 27 18 4
Product add 0+ 18+ 0+ 7+ 6+ 40+ 12+ 27+ 18+ 4= 132
ISBN uses Modulus 11 for the check digit. In this case, 132 is divisible by 11, so it passes the check digit.
To set the check digit multiplier, scan the following bar code, and then scan numbers and letters to form the
multiplier string from Appendix H, Alphanumeric Bar Codes. Then scan End of Message on page H-7.
OCR Check Digit Multiplier
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