169
Using the Metal Detector
This chapter provides general information about using the metal detector, including some guidance on
setting up the detector to provide the best results.
The following sections provide more information:
■
Good Practice
This section provides some guidance for maintaining an effective metal detection regime.
■
Establishing a Good Product Learn
Carrying out a full product learn is an essential first step to ensure that the metal detector
performs effectively.
■
Establishing Detector Performance
Once a product learn has been completed, the next step is to establish the levels of metal
detection achievable.
■
Regular In-Line Detector Performance Testing
Regular testing of the detector’s performance, including checking activation of reject devices,
provides confirmation and continued confidence in its detection capabilities.
■
Handling Rejected Products
Effective removal of contaminated products from the production line to ensure that they are not
delivered to customers is an essential part of the inspection process.
■
Getting the Results
The IQ
3
+ Metal Detector has built in inspection settings to achieve the best detection results for
a wide range of product types, including those that create no product effect.
■
Frequency Selection
Although the detector operates across a range of frequencies, generally a product will have an
optimum frequency at which detection is best. This frequency can be manually set but the IQ
3
+
Metal Detector has the capability built in to automatically search for and select it.
Good Practice
The following guidelines include recommendations for ensuring and maintaining an effective metal
detection regime. There are four essential components in using the IQ
3
+ Metal Detector effectively:
■
Establishing a Good Product Learn.
■
Establishing Detector Sensitivities.
■
Regular In-Line Detector Sensitivity Testing.
■
Handling Rejected Products.
These four components are described in detail in this chapter.
Establishing a Good Product Learn
Before inspecting products for inclusion of metal contaminants, you must first carry out a full product
learn process. See
Learning Products
for further details.
This process consists of passing known good product packs through the detector so that it can
establish what effect the product has on the electromagnetic field as it passes through the aperture.
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