IFM LX Series - 6�3�3 Determination of the Rod Length L When Coaxial Probes Are Used; 6�4 Installation of the Unit with Single Probe

17
UK
► Remove fastening bracket and
centring piece (A, B)�
► Shorten the coaxial pipe to the
requested length: L
K
= L + 9 mm�
► After shortening, at least one
hole (C) for insertion of the fixing
bracket has to be left�
► Remove all burrs and sharp
edges�
► Insert centring piece (A) at the
lower end of the pipe and attach it
using the fixing bracket (B) at the
lower hole (C)�
fig. 6-6
A
B
C
L
K
= length of the coaxial pipe
L = length of the rod from the lower edge
of the process connection (fig� → 6�5)�
6.3.3 Determination of the rod length L when coaxial probes are used
Relevant in case the rod length L is unknown (fig� 6-5):
► Measure the exact total length L
K
of the coaxial pipe (fig� 6-6)�
► Deduct 9 mm from the total length of the coaxial pipe: L = L
K
– 9 mm �
► Note down L� Value L must be entered when setting the parameters of the
device (→ 9.1 Parameter setting via PC)�
6.4 Installation of the unit with single probe
For the correct function when used with single probe, the unit needs a
large enough metal launching plate� It is necessary for transferring the
microwave pulse to the tank with optimum transmission power� The flange
plates that are available as accessories are not sufficient as launching
plates�
For installation in closed metal tanks, the tank lid serves as a launching plate (R in
fig� 6-7 and 6-11)� 2 ways of installation are possible:
• Screw in a G¾ process connection in the tank lid (→ 6.4.1).
• Installation in the tank lid using a flange plate, e�g� for tanks with thin walls
(→ 6.4.2).
Furthermore, installation in open tanks (→ 6.4.3) and plastic tanks is possible
(→ 6.4.4).