Loma IQ3, User Manual

Page: 59 / 144

Installation
frequencies, unless the transmitter is held very close to the detector aperture), it is not uncommon for
the control frequency (or multiple of it), used in modern speed controllers, to cause interference.
To reduce the risks of such interference causing false rejects or other symptoms of undesirable
operation at the metal detector, the following recommendations should be followed:
■
Always route speed controller input and output wiring away from the metal detector area.
NEVER put speed controller wiring in the same conduit or on the same supply as the metal
detector wiring.
■
Run speed controller wiring in the general vicinity of the metal detector in a rigid steel conduit
or use other techniques to ensure 100% screening of the cable.
■
Always follow the speed controller manufacturer’s instructions for installation, wiring,
screening and grounding.
In addition to following these guidelines, most speed controller manufacturers supply input and output
filters which can be fitted to the field wiring to dramatically reduce RF emissions if necessary.
All Loma metal detectors are designed, and tested, to meet the requirements of the FCC and the new
stringent European regulations for RF emissions, both in terms of not emitting excessively and not
being subject to undesirable operation in the presence of other equipment whose emissions also
meet the standards.
This approach allows Loma to offer stable operation even in RF noisy environments, provided the
other equipment is to the same standards and the field wiring is suitable ‘hard’.
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