Worth Data RF Laser user manual 01234500006, 01234565

UPC-E Checksum Calculation

Use the sample data of 123456 to demonstrate the UPC-E checksum calculation:

1.The 6 digit UPC-E code is converted to a 10-digit code, using an expansion scheme based on the sixth digit:

If the code	UPC-E Data	Insertion Digits	Insertion	10 digit code
ends in:			Position
0	abcde0	00000	3	Ab00000cde
1	abcde1	10000	3	Ab10000cde
2	abcde2	20000	3	Ab20000cde
3	abcde3	00000	4	Abc00000de
4	abcde4	00000	5	Abcd00000e
5	abcde5	0000	6	Abcde00005
6	abcde6	0000	6	Abcde00006
7	abcde7	0000	6	Abcde00007
8	abcde8	0000	6	Abcde00008
9	abcde9	0000	6	Abcde00009

Because the sample UPC-E code ends in a 6, the insertion digits 0000 are inserted at the sixth digit (insertion position 6):

1234500006

2.Add the Number System Character of 0 to the sample data:

01234500006

3.Use the UPC-A check digit calculation described in the previous section to produce a check digit as if it were a UPC-A code. The check digit for the sample data is:

5

4.The complete 8 digit code consists of the Number System Character, the original 6 digit code and the check digit:

01234565

44