Metal Detector Disturbances Sources - Automatic Systems ClearLock 645 User Manual

Once the unpacking has ended, before assembling the booth, keep the components in a clean and dry place.
Only skilled staff, which has been authorised by
assembly of the booth. The installation and assembly handbooks must be followed.
After assembling, the technician, and the customer, will test the booth and fill in the testing form. The customer
will sign the form if the test is positive.
A qualified technician must do the testing as well as all the adjustments
and he must have the booth in running order.

3.3. Metal detector disturbances sources

The metal detector is a device sensitive to electro-magnetic parasitic disturbances. In order to achieve the
highest performances, especially at the highest sensitivity levels, it is necessary to take some precautions when
you use the structures in which it is placed.
There are two different kinds of interference sources:
1) mechanical disturbances
2) electric disturbances.
Mechanic disturbances
The metal detector has an electro-magnetic field generator that is able to induce an electromotive force in its
receiving section. If the action of passing through metal objects modifies this force, the appliance will go on. The
flux of magnetic field runs partly over the space surrounding the probe, too.
Possible adjacent metal structures can introduce field absorptions, which can be due to:
A- The moving of considerable metal masses or masses placed especially close to the aerials.
B- Fixed metal structures that are placed near the Metal Detector can be replaced by panels made of
formica, bakelite, polycarbonate or other insulating materials.
C- Doors: if the doors are made with metal materials, they must be placed at a distance of at least 60 cm.
The scroll formed by the door's metal section bars must be insulated. If the doors are made of insulating
material (blindovis with wood, etc.) the mentioned precautions are not necessary.
D- Electro-magnetic scrolls formed by structural components (metal frames, glass doors, metal ceiling
strips, etc.) that because of movements or vibrations, do not have a stable nature. If the scrolls are
liable to movement, they must be removed from the aerials or eliminated by insulation. If the scrolls
are fixed, since they are made of structures and section bars surrounding the metal detector, they must
be insulated by an appropriate split. Otherwise, they can be made electrically stable by rivetings or
electrical by-pass connections (in case of varnishing, remove the varnish coat on the faying surface of
the screws, and use toothed washers).
The information contained in this document is the property of Automatic Systems and is confidential. The recipient shall refrain from using this information for any purpose other
than the use of the products or the execution of the project to which it refers and from communicating it to third parties without prior written agreement of Automatic Systems.
The document is subject to change without notice.
ClearLock 645
-UM-EN
Automatic Systems, can carry out the installation and the
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