
Operating Instructions Chapter 6
CLV490 Bar Code Scanner
8009993/RA61/2007-07-20 © SICK AG · Division Auto Ident · Germany · All rights reserved 6-45
Operation
4. Choose CLOSE to close the window.
If the parameters in the CLV490 were modified as a result of the teach-in procedure,
CLV-Setup asks you whether you want to copy and display the modified parameter set
by uploading it from the CLV490.
5. Confirm the query with Y
ES.
The dialog box closes automatically.
The CLV490 resumes Reading mode and the "Device Ready" LED lights up.
Displaing the taught-in background:
The new background distance profile can be uploaded and displayed in CLV-Setup via the
auxiliary interface of the CLV490. CLV-Setup displays the background without any
parameterized limitations ("Autofocus space").
1. Choose the R
EADING CONFIGURATION tab.
2. In the A
UTOFOCUS section, click the SHOW BACKGROUND button.
The S
HOW BACKGROUND dialog box appears.
An example of a distance profile is shown in Fig. 6-12.
Note The CLV490 adjusts the entire profile of the taught-in background by minus 100 mm (3.94
in), that is, the entire background curve is moved toward the CLV490 by this amount (also
in the display in CLV-Setup) to compensate measurement inaccuracies. The parameterized
limits of the applicable autofocus space are not corrected. The CLV490 also shifts the
edges of the measured profile toward the center by 2 angular elements.
If no background has been taught in, the CLV490 uses the default background (2,200 mm
( 86.7 in) across the entire distance profile).
Fig. 6-12: CLV-Setup: Display of th learned background
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