Siemens SIMATIC MV500, Operating Instructions Manual, Page: 50 / 294

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3.2 Code verification
SIMATIC MV500
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Operating Instructions, 03/2021, C79000-G8976-C494-05
3.2.4 Calibration and activating the verification
Calibrate
To use the optical reader as a verifier, a calibration must be performed. Calibrating the optical
reader ensures that with every test setup, correct and reproducible results are returned in
keeping with the selected standard.
You will need to calibrate the optical reader the first time you commission it in your
production area.
Verification library
Calibrations are created as elements of the verification library according to the procedure
described below. You can then reference a stored calibration in one or more programs.
Requirement: Stable lighting conditions
The conditions must be stable in the operating environment of the verifier. If the position of
the device or the ambient lighting or ambient temperature changes, recalibration is
necessary. Without calibration, the results may fluctuate considerably. Regular recalibration it
is necessary for stable results.
After successful recalibration of an element of the verification library, all programs that
reference this element can be used immediately.
Siemens AG recommends that you operate the optical reader with its own lighting. You
should also shield the optical reader and the code to be measured from the surrounding light.
Some verification procedures (e.g. ISO/IEC 15415 and ISO/IEC 29158) require the use of
certain lighting types and lighting equipment. You will find detailed information on this in the
relevant documents from ISO/IEC.
Performing system normalization and reflectance calibration
Once you have set up the optical reader in the location where it will be used, the system
needs to be calibrated with the calibration card.
The Veri-Genius license is supplied with a calibration card.
3.2.4.1 Calibrating the optical reader
The calibration determines suitable lighting parameters and obtains the correct calculation of
the contrast and the size measurements of the test system.