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Operating Instructions
Original Document
Copyright © Loma Systems
PVS Test
Select this option if you are using the Performance Validation System to carry out product testing
at specific times and have configured this in the Menus > Set Up > PV Test Set Up menu. You can
also access the PVS Log to view the test details.
4.17 Learning Products
An essential part of inspecting products is to set up the metal detector parameters specifically
for each product to optimise the detectors performance for each one. Loma metal detectors
provide a Learn feature which automates this process.
The Learn settings and the process to be followed is defined in the Menus > Learn > Set Up and
Menus > Service > Configuration > Learn Limits menus.
Note that the Menus > Learn > Set Up menu is only available if the Set Up Learn option has been
enabled in the Menus > Service > Options menu.
The metal detector provides three alternative Learn processes:
Full Learn
This process must be carried out initially on all products as it automatically configures and
populates the system settings and parameters based on effect of the product on the
electromagnetic field as the product passes through the inspection aperture.
The product samples used for the Learn process must be free of metal contaminants and fully
representative of the normal products to be inspected.
Following a Full Learn, any manual adjustment to the settings for a product can be accessed
through the Menus > Learn > Set Up menu. See the Full Learn section for further details.
Update Learn
This process is only available if you have previously carried out a Full Learn process for the
product. It fine-tunes the phase value to minimize the signal, while still checking for metal in the
product. Use an Update Learn to update the signal when the production line is running if false
rejects are occurring because the signal has drifted.
See the Update Learn section for further details.
Reverse Learn
This process is only available if the Reverse Mode option has been enabled in the Menus >
Service > Options menu screen. It is used in situations where for example a product must contain
a contaminant, perhaps a toy car or whistle, and the metal detector is being used to reject
products that do not contain one.
Both the Full and Update Learn processes can be selected and run from the Learn Set Up menu
when the detector is in Reverse Mode.
See also the Learn Messages section which lists the messages that may be displayed by the
metal detector during a Learn process and provides an explanation for each one.
Summary of Contents for IQ3X
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