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READING FEATURES
READING DIAGRAMS
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NOTE
112
MATRIX 220
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 220 using application codes in
order to evaluate whether maximizing application performance requires adjust-
ments 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 0.75; specifically 960/1280. (i.e. FOV
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 "
Maximum Line Speed and Exposure Time Calculations" on page 119
Common software parameter settings other than default settings are:
For reading 1D code symbologies: Narrow Quiet Zone=Enabled.
For reading 2D code symbologies: Code Contrast=Standard; Decoding Complex-
ity=Medium.
When defining a HW/SW configuration for the Matrix 220 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 luminos-
ity 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. Increas-
ing the Gain value however, can reduce the quality of the acquired image.
- For the DPM illuminators, the overall lighting power being considered is all Sec-
tors ON from the Internal LED Group, unless specified otherwise.
The following reading diagrams are not referred to Matrix 220 3U2-01U
1.2MP STD-UV 7MM HP.
Refer to " UV Fluorescence applications" on page 53 for more details.
≅ FOV
x 0.75).
V.
H
.
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