Printronix ThermaLine Series manual Quiet Zone

Quiet Zone

Both ends of the bar code structure require blank quiet zones. The quiet zones must be at least 0.25 inches wide and completely blank to ensure accurate reading of the start/stop codes and to prevent adjacent bar codes from overlapping. Be sure to provide sufficient space on the form for the quiet zones.

Start/Stop Codes

The start/stop codes identify the leading and trailing end of the bar code. Each of the Code UCC±128 subsets uses a unique start code and a common stop code, both automatically provided by the IGP/PGL.

Data Field

The bar code symbol uses a series of varying width bars and spaces to represent 100 pairs of numeric digits (00 through 99) and 3 control characters. The bars and spaces vary in width from 1 to 4 modules. Each character consists of three bars and three spaces that total 11 modules.

The IGP/PGL inserts a Function 1 character before the data. A mod±10 check digit is calculated from 19 digits that represents a 2±digit qualifier, and 17±digit data portion.

Readable Data

The optional readable data field provides a readable interpretation of the bar code data. It can be printed above or below the bar code symbol, appears in 13 CPI, and is broken up by spaces to denote UCC±128 data fields.

Check Digit

The modulo±10 check digit is automatically calculated and inserted in the bar code symbol. The check digit verifies accurate scanning. The start code is included in the check digit algorithm.

The modulo±103 check digit is also automatically calculated and inserted in the bar code symbol. The check digit verifies accurate scanning. The start code is included in the check digit algorithm.

5±52 Bar Codes