Worth Data 520-RF Instrukcje Operacyjne Pobierz pdf (Strona 55)

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

ends in:

UPC-E Data Insertion Digits Insertion

Position

10 digit code

abcde0 00000

Ab00000cde

abcde1 10000

Ab10000cde

abcde2 20000

Ab20000cde

abcde3 00000

Abc00000de

abcde4 00000

Abcd00000e

abcde5 0000

Abcde00005

abcde6 0000

Abcde00006

abcde7 0000

Abcde00007

abcde8 0000

Abcde00008

abcde9 0000

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:

4. The complete 8 digit code consists of the Number System Character,

the original 6 digit code and the check digit:

01234565

1 2 ... 50 51 52 53 54 55 56 57 58 59 60 ... 63 64

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Worth Data 520-RF Instrukcje Operacyjne Strona 55