IBM 4400 manual Ean

EAN 13

EAN 13

The EAN 13 bar code structure is shown in Figure 12 and described below.

SR, SC

POSITION

NUMBER SYSTEM CHARACTER

	START CODE	CENTER CODE		STOP CODE
QUIET	LEFT DATA		RIGHT DATA	QUIET
ZONE		FIELD	FIELD	ZONE
N
		OPTIONAL READABLE		CHECK
			DATA FIELD	DIGIT
				FIELD

2- or 5-

DIGIT

ADD-ON

CODE

HEIGHT

Figure 12. EAN 13 Structure

Quiet Zone

Quiet zones extend on both ends of the bar code to permit the code to permit the scan to begin and end in a blank area. You are responsible for providing sufficient space (minimum of seven modules) on the form for the quiet zones. The number system character is also printed automatically in the left quiet zone.

Start/Center/Stop Codes

The start/center/stop codes are special character codes marking those portions of the bar code. These codes are automatically provided.

Number System Character

The number system character field allows you to provide a code to a class or type of item. The first character in the data field is used as the number system character.

Data Field

The bar code symbol uses a series of varying width bars and spaces to represent a limited character set (numbers 0-9 and Special Characters Start, Center, and Stop). The bars and spaces vary in width from one through four modules. Each character consists of two bars and two spaces that total seven modules. The symbol coding of the left data field is different from the right data field to permit read direction sensing.

Readable Data

The human readable data field provides a readable interpretation of the bar code data. It can be either be suppressed or printed above or below the bar code symbol.

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