Operating instructions
4
3. Electrical Connection
The connection of the sensor has to be carried out according to below figures.
For the 2-wired connection to the transmitter a current installation cable can be used.
To detect levels of materials with low bulk density respectively with a low dielectric coefficient reliably, the
installation of transmitter and receiver can be done as shown in the drawing below.
In this type of installation the metallic wall on the opposite side of the bin can be used for the reflection of
the microwave.
The arrangement of transmitter and receiver mustn’t be exactly parallel to each other in this installation,
because in that case the signal of the transmitter is not reflected to the receiver. The installation should be
slightly angled.
According to the rule arriving angle = emergent angle a slightly angled positioning, depending on the
distance to the opposite wall, is necessary.
The distance covered by the microwave in the shown installation is nearly twice as long as it is in a face to
face installation. The installation of the equipment on one side of the bin is also an advantage in case of
shortage of space.
Round Wall (metallic)
Tr
ansmitter
Receiv
er
▲
▲
▲
▲
▲
▲
Rectangular wall (metallic)
Tr
ansmitter
Receiv
er
▲
▲
▲
▲
▲
▲
Fig. 2: Transmitter
Fig. 3: Receiver
NC
NO
COM
