Safeline STANDARD SERIES, Instruction Manual

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Page 5
INSTALLATION
GENERAL
Safeline advise users to carefully study the
installation advice provided; a little care taken
during installation will avoid the detectors
performance from being severely impaired.
Safeline detectors utilise a low power high
frequency magnetic field coil system which has the
ability to sense minute disturbances created by
metal particles.
Steel, aluminium, stainless steel any type of metal
particle when passed through the aperture of the
detector will create changes in the magnetic field of
the detector. These changes generate electrical
signals in the coil system.
Most of the detectors high frequency magnetic field
is contained within the metal case of the detector
head. Unavoidably there is
some leakage of the
magnetic field from the aperture of the detector.
It is the effect of the leakage magnetic field on the
surrounding metalwork that may influence the
detectors performance and can give rise to
spasmodic detection signals and inconsistent
performance.
A little care when installing the detector will be
rewarded by a consistent, highly reliable metal
detector performance.
Metal Free Zone (MFZ)
To achieve optimum metal detector performance,
an area surrounding the aperture of the detector
known as the MFZ should be kept free of metal.
The size of this surrounding area will be dependent
upon the aperture size, the type of detector and the
operating sensitivity.
Stationary metal may be positioned closer to the
detector than moving metal. MFZ guidelines for
standard series detectors are as shown in fig 5.
Please consult the product data sheet for MFZ of
other types of metal detector.
Fig. 5 Metal Free Zone Guidelines - Standard Series Detectors