Loma IQ3+, User Manual

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About Metal Detection
14
Product Test Samples
Some guidelines for the provision of product test samples are listed below.
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Ensure that the samples are representative of a good product in all respects.
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Ensure that the samples are free from metal contaminants.
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Mark or label the samples to identify them and prevent them being despatched to customers.
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Produce fresh samples for testing at a frequency that reflects the nature, durability and shelf life
of the product concerned. ‘Stale’ test packs may produce different product signals.
Test Wands
Loma Systems metal detectors are supplied with a set of plastic test
‘wands’ which contain spherical pieces of various metals in different
sizes. These are convenient and easy to place into your test samples
and also make the testing process even more efficient.
Generally the types of metal and sizes provided will include those
covering the specific detection requirements for the customer.
Loma Systems offer a wide variety of spare test wands. To purchase
additional test wands please email
teststicks@loma.com .
Testing Guidelines
You may be working to specific Customer Codes or Practice to test detector performance, but some
general guidelines for testing product samples are listed below.
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Sample products should be tested with both ferrous and non-ferrous test wands.
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When testing finished packed products on a conveyor system, place the test wand, where
possible, at the extreme end of the pack. If this is impractical, for example if you are testing
individual small packs or sandwich wedges, place the test wand in the centre of the product.
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Test samples should be passed through the search head two times, first, with the test wand at
the leading edge of the pack and then with the test wand at the trailing edge of the pack.
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When using a reject device, ensure that test samples which have a test wand attached
successfully enter the reject bin or that the conveyor stops when using ‘Stop on Detect’.
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Wherever possible, fit metal detection equipment on your production line AFTER products have
been wrapped. Where this is not possible and you are manufacturing private label goods, it is
advisable to agree to the testing routine, in writing, with the retailer concerned.
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For pipeline systems, place ferrous and non-ferrous test wands independently in the product
flow and observe appropriate rejection. However, where that is not practical within a pipeline
system, insert the test wand between the pipe and the search head and then observe for the
appropriate rejection.
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Should any part of your test fail, isolate all products produced since the last satisfactory test
and re-screen them, using another detector functioning to the same standard as the original
system performing the test.
Test Records
PVS Testing
When testing is carried out using the in built Performance Validation System (PVS), the results are
recorded automatically by the system.
They are available by navigating to the Logs/Reports screen and tapping on the PVS Log option from
the list provided. The PVS Log screen is then displayed showing a complete set of test results.