Datalogic Hand-held devices II Spezifikationen PDF herunterladen (Seite 16)

Page1 AllAboutBarCodes

UPC (Universal Product Code)

UPC is the standard bar code for items for sale to the public It is the code seen on items at the

local supermarket UPC-A is a xed-length, numeric-only bar code Traditionally, the UPC contains 1

digit for a Number System Character, 5 digits for the manufacturer number, 5 digits for the product

number, and one checksum digit The Number System Character and the manufacturer number,

combined, constitute the Company Prex, assigned by the UCC and EAN standards organizations

The manufacturer assigns the product number, thus creating a unique bar code value for each product

manufactured by over a million manufacturers around the world The UCC has mandated a Sunrise

2005 date, by which time all systems must be upgraded to allow variable length Company Prexes

and product numbers

The UPC bar code can be printed in two formats, a full 12 digit UPC-A form and a compressed 8 digit

UPC-E form UPC-A and UPC-E also allow two or ve digit supplemental numbers UPC-A and UPC-E

codes require checksums

Extended Code 39

Extended Code 39 is a derivative of Code 39 This symbology uses combinations of two standard Code 39 characters for every

character in the ASCII character set (0-127) This symbology allows lowercase letters and control characters, at the expense of

size This makes the code very big if you have very many lowercase or special characters

Most bar code readers in their default conguration will not read Extended Code 39 If you want to use this symbology, you will

probably need to congure the reader If you need to read both uppercase and lowercase, Code 128 may be a better choice

Code 93

Code 93 is a compressed version of Code 39 and Extended Code 39 This symbology supports the same characters as Code 39,

but in a smaller character width Easy to read, very secure (two required check characters), but many readers do not support it

Code 93 has automatic checksums

UCC/EAN-128

This is a special version of the Code 128 bar code which is reserved for use within the EAN/UCC system It is a variable-length

symbol that encodes the values for one or more Application Identiers as dened by the EAN/UCC standards

Codabar

Codabar bar codes can include numeric characters, six punctuation characters (-$:/+), and spaces

There are also four special start/stop characters, which are A, B, C, and D Codabar is useful

for encoding dollar gures and mathematical gures These bar codes are slightly larger than

Interleaved 2 of 5 bar codes

Codabar requires start and stop characters The Codabar symbology is self-checking, but you can use a

mod 16 checksum

EAN/JAN

The EAN/JAN-13 and EAN/JAN-8 codes are similar to the UPC codes, and they are assigned by

international Member Organizations of EAN International for use worldwide The UCC Sunrise 2005

initiative dictates that all North American companies upgrade their systems to read the EAN/JAN

codes, as well as the UPC codes These codes contain a variable number of digits for a country code, a

company prex, a product identication, and a checksum

Figure 9 - UPC-A Symbology

Figure 10 - UPC-E Symbology

Figure 11 - EAN-13 Symbology

Figure 12 - EAN-8 Symbology

1 2 ... 11 12 13 14 15 16 17 18 19 20

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