Eriez Xtreme, Reference Manual

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It is vital that the sensing head be protected from excessive vibration, physical abuse,
electromagnetic interference, static electricity, and corrosive materials. The conveyor belt,
chute, or other conveyance device must not contact the metal detector aperture.
Utilizing the control remotely requires that it be mounted to a convenient surface with minimal
vibration. It should also be easily accessible in the event an adjustment is necessary. The
control enclosure is fitted with mounting tabs that must be isolated to prevent electrical current
loops.
HANDLING
The metal detector must be handled with care during installation. Refer to the Handling
Instructions for more information.
LOCATION OF SENSING HEAD
The location of the metal detector sensing head is extremely important. When selecting a
location, consider the surrounding processing equipment, product velocity, and rejection of
foreign objects. Operator convenience should also be evaluated. Ensure installation guidelines
are followed and met before the final location is selected. If there are any questions, please
contact Eriez for assistance.
METAL FREE AREA
The metal detector monitors an electromagnetic field to detect metal. This field is
predominantly contained within the aperture of the detector. However, some of the
electromagnetic field extends out from the inlet and outlet of the aperture. This extended field
causes the metal detector to be affected by metal in the vicinity of the aperture. Metal that is
not part of the product stream must not be present in this area. The required metal free area
depends on the size of the smaller dimension of the aperture. In most circumstances 1.5 times
the smaller aperture dimension is a sufficient distance for stationary metal and 2.0 times for
moving metal. Testing to determine the metal free distance will help ensure mitigation of false
tripping. Refer to Figure 2.
MECH
For installations where the metal detector control screen presents
ergonomic challenges or unsafe viewing conditions, it is recommended
that a remote display be used to eliminate these issues.
CAUTION
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