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Technical Data
4.3
Optical Data
The range in which the bar code can be read by the BCL 80 (the so-called reading field) depends on
the quality of the printed bar code and its dimensions.
Therefore, above all, the module of a bar code is decisive for the size of the reading field.
Figure 4.4:
The most important characteristics of a bar code
Note!
A rule of thumb: The smaller the module of the bar code is, the smaller the maximum reading
distance and reading field width will be.
Therefore, when selecting a mounting location and/or the bar code label, take into account
the different reading characteristics of the scanner with various bar code modules.
The BCL 80 is available in various models for various reading tasks. A distinction is made between
line scanners and line scanners with an oscillating mirror add-on. The latter may be used as de-facto
raster scanners. For both varieties, there is also a version featuring code reconstruction technology
(CRT). The device specifications are given in the following table and accompanying figure.
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M
= Module: The narrowest line or space of a bar code
in mm
Z
= Wide elements: Wide lines and spaces are a multiple
B
(ratio) of the module
Module x Ratio = Z
B
= Quiet zone: The quiet zone should be at least
Z
10 times the module, but not less than 2.5 mm.
L
= Code length: The length of the bar code in mm
including the start and stop characters. The quiet
zone is included depending on the code definition.
S
= Element length: Height of the elements in mm
L
Technical Description BCL 80
Leuze
electronic
(Normal Ratio 1 : 2.5)
B
Leuze electronic
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