18
►
Avoid non-flush installation (see fig� 6-7)�
►
The height can be slightly corrected by means of appropriate sealing material
(e�g� Teflon tape)�
6.4.4 Installation in plastic tanks
150 mm
R
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 diameter of 150 mm must be applied to the plastic
lid�
►
For installation of the unit, a metal flange plate (= launching plate R) must be
used which sufficiently covers the drill hole
(→
accessories)�
►
Ensure the minimum distance (= 80 mm) between rod and tank wall, higher for
probe lengths > 70 cm and in case of heavy soiling
(→ 6.1)
�
When installed in plastic tanks, there may be deterioration caused by
electromagnetic interference� Corrective measures:
• Apply a metal foil to the outside of the tank�
• Apply a shielding screen between the level sensor and other electronic
units�
6.5 Alignment of the sensor housing
After installation, the sensor housing can be aligned� It can be rotated
without restriction� Even if rotated several times there is no risk of damage
to the unit�
