Mesutronic METRON 07 C, Перевод оригинального руководства пользователя

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-9- General information
General notes on metal detection
Electro-magnetic short circuits
Certain metal frame constructions in conveyor belt frames (see drawing) and suspensions (e.g. castors, cross-
bars, adaptor plates) can act as an electro-magnetic loop in the vicinity of the metal detector, affecting the
magnetic field of the metal detector. Closed conductive loops must either be welded tight, or interrupted, e.g.
with unilateral isolation.
Example:
a) Conveyor belt frame
b) Conveyor belt motor
c) Isolation
1. If the crossbar is permanently welded, the electromagnetic effect on the metal detector remains
constant and does not negatively affect the field of the metal detector.
If the crossbar is only bolted, a constantly conducting connection cannot be guaranteed. The metal
detector is negatively affected by the changing conductor loop.
2. Rollers and moving parts that form a conductor loop must be insulated at one end (see fig. 3 .), in
order to interrupt the conductor loop.
Electrostatic discharges
Prevent at all cost electrostatic discharges to the metal detector and surrounding construction components
using the appropriate earthing. Electrostatic discharges can cause false signals and at worst, destroy the
analysis electronics.