BERTHOLD TECHNOLOGIES LB 567, Руководство пользователя

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Chapter 4. Getting Started
MicroPolar 2 (++) LB 567 49
Exception: Oblique transmission
Typically, the horn antennae and the radiometric measuring
path are installed at a 90° angle to the material flow. Whether
oblique transmission is necessary and in which angle the anten-
nas should be mounted has to be clarified before planning the
project. The angle (see Figure 4-13) will be specified by
Berthold Technologies.
Figure 4-12:
Setup for oblique
transmission.
The angle will be
defined by Berthold
Technologies
Oblique irradiation is a better choice only in exceptional cases.
In case of strong reflection, the interference of the reflected
wave can be reduced.
A too large angle
α
would cause refraction and the transmitted
waves may propagate aside the receiving antenna.
Exception: Steel-wire reinforced conveyor belt
If the conveyor belt is reinforced by metal ropes in the conveying
direction, the antennas have to be mounted such that the electric
field (E) runs at a 90° angle to the ropes. The connection socket
of the antenna cable faces the same direction as the electric field,
see Figure 4-13 and 4-14.
Microwaves can irradiate conveyor belts with parallel metal wires
or rods only if the horn antennas are oriented correctly.
Please contact the manufacturer and state the diameter of the
steel ropes and their distance. Make sure that the belt itself is not
made of conductive rubber (anti-static through additional graph-
ite).
The surface of the product must be flat over a stretch of at least
500 mm (instead of 350 mm as in a regular configuration).
α