19
UK
Installation in plastic tanks
6.4.2
To enable sufficient transfer of the
measured signal, note in case of
installation in plastic tanks or metal
tanks with plastic lid:
A drill hole with a minimum diam-
•
eter of 150 mm must be applied to
the plastic lid�
For installation of the unit, a flange
•
plate (= launching plate R) must be
used which sufficiently covers the
drill hole�
150 mm
R
Minimum distance between rod and tank wall = 80 mm, higher for rod lengths > 70
cm and in case of heavy soiling (→ 6.1.1).
When installed in plastic tanks, there may be deterioration caused by
electromagnetic interference� Remedy:
Apply a metal foil to the outside of the tank�
•
Apply a shielding screen between the level sensor and other electronic
•
units�
Operation with coaxial probe efficiently protects the unit from elec-
•
tromagnetic interference� Please note the restrictions regarding the
application area (→ 4.3).
Installation using a flange plate
6.4.3
Flange plates are not included in the scope of delivery� They must be ordered
separately (→ chapter 3).
d
A
B