READING FEATURES
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6
6.2 READING DIAGRAMS
The following reading diagrams are to be considered as references and are given for
typical performance at 25°C using high quality grade A symbols: Code 128 (1D code) and
Data Matrix ECC 200 (2D code) from the Test Charts provided with the reader.
Testing should be performed with the actual Matrix 300™ using application codes in
order to evaluate whether maximizing application performance requires adjustments to
the HW/SW configuration with respect to the Reference Conditions given under each
diagram.
The ratio of the Vertical FOV width with respect to the Horizontal FOV width in the
diagrams is about equal to 0.8; specifically 1024/1280. (i.e. FOV
V.
FOV
H
x 0.8).
The reading distance ranges are measured from the reading window surface.
The max theoretical Line Speed values for each diagram can be calculated using the
formula in par. 6.5.
Common software parameter settings for all 6 mm models reading all code symbologies,
and all 9 mm models reading 1D code symbologies are: Processing Mode=Advanced
Code Setting; Self Tuning=Disabled.
For 9 mm models reading 2D code symbologies: Processing Mode=Standard; Self
Tuning=Enabled; Self Tuning Mode=Processing Modes Only.
When defining a HW/SW configuration for the Matrix 300™ for conditions different from
those of the reference diagrams, it is suggested to keep in mind the following rules:
Changes in
Exposure Time
act directly proportional to the luminosity of the image
and inversely proportional to the maximum code reading movement speed.
Consequently, reducing the
Exposure Time
by half, reduces the luminosity of the
image by half but doubles the theoretical code reading movement speed.
Changes in
Gain
act directly proportional to the luminosity of the image.
Increasing the
Gain
value however, can reduce the quality of the acquired image.
At the center of the field of view, the lighting power of the “RED WIDE” illuminator
is about equal to twice that of the “WHITE WIDE” illuminator, 1.5 times that of the
“MLT-DPM” illuminator, and 2.9 times that of the “LT-DPM” illuminator.
For the two DPM illuminators, the overall lighting power being considered is from
the four Central LED chains, unless specified otherwise.
6.2.1 Pre-Configured .INI Files
Each depth of field (DOF) range shown in the various Reading Diagrams can be obtained by
loading a pre-configured .ini file that already contains the parameter settings necessary to
replicate the reading diagram results.
These .ini files are provided with and can be loaded from
the VisiSet™ installation directory
as in the following example:
C:\Program Files\Datalogic\VisiSet2\Std_660\Reading Diagram Configuration Files\412-xxx RED Wide
The names of the .ini files correspond to the specific Reading Diagrams; they indicate the
Code Type, Code Resolution, Reading Distance, and Luminosity variable settings (A or B if
any). These can be directly matched to the relative Reading Diagram to obtain the desired
DOF.
Summary of Contents for Matrix 300
Page 1: ...REFERENCE MANUAL Matrix 300...
Page 160: ......
