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Doc. Ref.No: Q875-0143/ENG
Issue 2
Met 30+ Operating Manual
12/01/10
3. INTRODUCTION
This is the operating manual for the MET 30+ 1f and 3f range of metal detectors
including horizontal, pharmaceutical, waferthin, vertical-fall and pipeline, with VFD or
Touch Screen displays.
The MET 30+ detector uses the latest developments in digital signal processing
ensuring complete product integrity. The detector is able to store up to 100 sets of
automatic product set up values in memory.
The MET 30+ detector is capable of detecting and rejecting ferrous, non-ferrous and
non-magnetic stainless steel.
A penetrating electromagnetic field is generated within the detector head, and any
metallic contaminant within the detector specification will distort the electromagnetic
field and be detected no matter how deeply embedded in the product.
On detection a reject relay is activated, this relay is used to switch the automatic
reject device, which rejects the contaminated product.
3.1 Detection
Sensitivity
The sensitivity of a metal detector is governed mainly by the size of the aperture
through which the product is passed and is particularly dependent upon the minimum
dimension of that aperture. Therefore, in order to obtain a high sensitivity on a given
product, the aperture size should be kept as small as convenient while allowing
sufficient clearance around the product to prevent blockages.
To overcome discrepancies due to the shape of a metal sample, sensitivities are
always quoted in terms of diameters of spherical samples. This is referred to as
‘Spherical Sensitivity’.
File Name: Q875-0143 ENG Iss2 Met30+ Operating.doc
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