21
UK
Fig.:
6-6
► 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)�
A
B
C
L
K
= length of the coaxial pipe
L = length of the rod from the lower edge
of the process connection (→ 6.3.1)
6.3.3 Determination of the rod length L when coaxial probes are used
Only relevant if the rod length L (→ 6.3.1) is unknown:
► Measure the exact total length L
K
of the coaxial pipe (→ fig. 6-6, on the right).
► Deduct 9 mm from the total length of the coaxial pipe: L
K
– 9 mm = L
► Note down L. It must be entered during parameter setting of the unit (→ 10.2).
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)�
