DS6400 REFERENCE MANUAL
102
9
9.5 READING DIAGRAMS
The reading diagram given below illustrates the convention used to calculate the minimum
and maximum reading distance for barcodes. This procedure allows calculating the reading
distance of your scanner when working with a focus different from the one displayed in the
reading diagrams given in par. 9.5.1 and par. 9.5.2.
Draw a straight vertical line at the minimum focus distance value; the points of intersection
between this line and the global reading area give the minimum reading distance.
Draw a circumference from the origin (0,0) with a radial distance equal to the maximum
scanner focus distance. The points of intersection between this circumference and the global
reading area give the maximum reading distance.
0
Minimum Reading
Distance
Minimum Reading
Distance
Maximum Reading
Distance
Maximum Reading
Distance
Maximum Reading
Distance
Global
Reading Area
Figure 114
– Calculating a Scanner Reading Area
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