AML M3000 Guida Utente Scaricare il pdf (Pagina 140)

Appendixes

A - 9

EXAMPLE: USS check digit. Sample bar code data: 513827

1. Sum 7 + 8 + 1 = 16

2. Multiply 16 x 3 = 48

3. Sum 2 + 3 + 5 = 10

4. Sum 48 + 10 = 58

5. 58 + 2 = 60 (check digit = 2)

Therefore: Data + check digit = 5138272

NOTE: A leading zero will be required to make it an even number of characters. The resulting

bar code will be: 05138272

OPCC CHECK DIGIT CALCULATION:

1. From right to left, assign every digit a weighting factor from the sequence:

2,1,2,1,2,1,2,1,...

2. Multiply each digit by its weighting factor.

3. Sum the products in step 2, treating two digit products as the sum of the individual digits.

4. The check digit is the smallest number which when added to the sum of step 3 produces a

multiple of 10.

EXAMPLE: OPCC check digit. Sample bar code data: 020489713

1. Assign weighting factors: 020489713 212121212

2. Calculate the products: 0 2 0 4 16 9 14 1 6

3. Sum the products: 0+2+0+4+1+6+9+1+4+1+6 = 34

4. 34 + 6 = 40 (check digit = 6)

Therefore: Data + check digit = 0204897136

1 2 ... 135 136 137 138 139 140 141 142 143 144 145 ... 155 156

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AML M3000 Guida Utente Pagina 140