LR8009
Electronic level sensor
16
A
B
C
u
Remove the fastening bracket and the centring piece (A, B).
u
Shorten the coaxial pipe to the requested length: L
K
= L + 9 mm.
u
After shortening, at least one hole (C) for insertion of the fixing
bracket has to be left.
u
Remove all burrs and sharp edges.
u
Insert the centring piece (A) at the lower end of the pipe and attach it
using the fixing bracket (B) at the lower hole (C).
L
K
:
length of the coaxial pipe
L:
length of the rod from the lower edge of the process connection
5.4.3 Determination of the probe length L when coaxial probes are used
Only relevant if the rod length L is unknown:
u
Measure the exact total length L
K
of the coaxial pipe.
u
Deduct 9 mm from the total length of the coaxial pipe: L
K
– 9 mm = L
u
Note down L. It must be entered during parameter setting of the device.
5.5 Installation of the device with single probe
For the correct function when used with single probe, the device needs a large enough metal
launching plate. It is necessary for transferring the microwave pulse to the tank with optimum
transmission power.
For installation in closed metal tanks, the tank lid serves as a launching plate. Two ways of installation
are possible:
•
Screw in a G¾ process connection in the tank lid.
•
Installation in the tank lid using a flange plate, e.g. for tanks with thin walls.
Furthermore, installation in open tanks and plastic tanks is possible.
5.5.1 Installation in closed metal tanks (without flange plate)
R
32
R: tank lid /
launching plate
u
Ensure that the lower edge of the process connection is flush with
the installation environment.
