Paxar 9474 User Manual download pdf (Page 86)

The table below shows the characters per inch for Code 128. The

table shows the values for numeric data, and for alphanumeric

data at each of the three densities available on the printer. The

characters per inch for your bar code will be somewhere between

these two values, depending on the mixture of numeric and

alphabetic characters. For a precise calculation of the width of

your bar code, refer to the specification for the Code 128 bar

code.

Density Numeric Data Alpha-numeric Data

1 17.48 8.74

2 11.66 5.83

3 8.74 4.37

Quiet Zone

When you estimate the area you’ll need for the bar code,

remember to add the length of the quiet zone. The quiet zone is

an area of white space required at the beginning and end of each

bar code. The minimum size of the quiet zone is 0.10, or 10

times the width of the narrowest bar code element, whichever is

greater. The tables below show the minimum size of the quiet

zone at each density. For wand scanning, the quiet zone should

be 0.25 to 0.35 inch.

Density Quiet Zone

10.10 inch

20.15 inch

30.20 inch

B-4 Code 128 Information

1 2 ... 81 82 83 84 85 86 87 88 89 90 91 ... 95 96

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Paxar 9474 User Manual Page 86