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Specifications
5.5
Reading field curves / optical data
Barcode characteristics
Notice!
Please note that the size of the barcode module influences the maximum reading distance
and the width of the reading field. Therefore, when selecting a mounting location and/or the
barcode label, take into account the different reading characteristics of the scanner with var-
ious barcode modules.
Figure 5.4:
The range in which the barcode can be read by the BCL 500
reading field) depends on the quality of the printed barcode and its dimensions.
Therefore, above all, the module of a barcode is decisive for the size of the reading field.
Notice!
A rule of thumb: The smaller the module of the barcode is, the smaller the maximum reading
distance and reading field width will be.
42
The most important characteristics of a barcode
BCL 500
M
= Module: The narrowest line or space of a barcode in
mm
Z
= Wide element: 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 10
Z
times the module, but not less than 2.5mm.
L
= Code length: The length of the barcode in mm includ-
ing the start and stop characters. The quiet zone is
included depending on the code definition.
S
= Bar length: Height of the elements in mm
L
i
i
\ BCL 501
(Normal Ratio 1 : 2.5)
B
i
\ BCL 501
i
(the so-called
Leuze electronic
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