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M3000 Portable Bar Code Reader User's Guide

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APPENDIX D - UPC SPECIFICATIONS

The Universal Product Code (UPC) symbols can be found on almost all retail products today. The

UPC coding system was designed to uniquely identify a product and its manufacturer.

UPC VERSION A

UPC-A is a fixed length (12 digits) numeric only code with the following features:

UPC-A BAR CODE

The NUMBER SYSTEM CHARACTER indicates the type of product the symbol is identifying:

0,7 Regular UPC codes with numbers assigned by the Uniform Code Council

2 Random-weight items such as meat and produce.

3 National Drug Code and National Health Related Items Code.

4 For in-store marking of non-food items.

5 Reserved for coupons.

1,6,8,9 Reserved for future use.

The last digit in UPC bar codes is a MODULO 10 CHECK DIGIT. It is calculated in the

following manner:

1. From right to left, sum the digits in the odd positions.

2. Multiply this sum by 3.

3. From right to left, sum the digits in the even positions.

4. Add this sum to the product of step 2.

5. The modulo-10 check digit is the smallest number, which when added to the sum

of Step 4 produces a multiple of 10.

EXAMPLE: UPC bar code = 01234567890C where C is the CHECK DIGIT.

1. Sum 0 + 8 + 6 + 4 + 2 + 0 = 20

2. Multiply 20 x 3 = 60

3. Sum 9 + 7 + 5 + 3 + 1 = 25

4. Sum 60 + 25 = 85

5. 85 + 5 = 90 (check digit = 5)

Therefore: UPC bar code - 012345678905

1 2 ... 132 133 134 135 136 137 138 139 140 141 142 ... 155 156

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AML M3000 Guide de l'utilisateur Page 137