Eriez Xtreme, Reference Manual

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The wiring from the mains supply panel to the metal detector should be a minimum of 14 AWG,
and should include a dedicated earth ground wire for safety and proper operation of the metal
detector. The power wiring should be run in a dedicated conduit. The best insurance against
electrical noise and false tripping is to run a separate circuit to the metal detector from the main
power bus. This circuit should be free of all loads except the metal detector. If this is
impractical, reliable operation can often be obtained by powering the metal detector from a
“clean” lighting or instrument circuit. This circuit must be free of inductive loads such as motors,
solenoids, and motor starters. If the metal detector must be powered by a less than favorable
source, a constant voltage transformer with harmonic neutralization can be used to eliminate or
reduce false tripping caused by line noise. This transformer should be mounted within 3-5 feet
(1 to 1.5 meters) of the metal detector.
The power source is connected to terminals L1 and L2. L1 and L2 are connected through
auxiliary circuit breaker 2 to terminals L1B and L2B on the circuit board. These terminals are
intended to be conveniently available to the user to power various pieces of auxiliary
equipment. The circuit breaker has limited capacity as indicated in the specifications. If a piece
of auxiliary equipment requires power in excess of the circuit breaker capacity, the auxiliary
equipment must be controlled from an intervening relay and powered from a separate source.
Main Circuit Breaker 1 protects the metal detector electronics. It is located on the right side of
the control door inside the control housing.
L1B and L2B are not disconnected by Main Circuit Breaker 1. They
are disconnected by Auxiliary Circuit Breaker 2.
CAUTION
The metal detector power source must contain a reliable ground (earth) connection. It must be
connected to the protective earth terminal of the metal detector. The metal detector should be
grounded at one point through the power supply ground wire. No other ground connections are
permitted, including mounting hardware and conduit.
For continued compliance with electrical safety standards, the
protective earth connection from the power source must be
connected directly to the protective terminal on the wall of the
enclosure. This is required to be the FIRST connection to the
terminal, and secured with a star lock washer and nut, independent
of any other connections to the terminal.
CAUTION
ELEC
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