27
UK
7.6.4 Installation in plastic tanks
D1
R
D1:
R:
min. 150 mm
launching plate
To enable sufficient transfer of the measured signal, note in case of installation in
plastic tanks or metal tanks with plastic lid:
►
The plastic lid must be provided with a drill hole with a minimum diameter of
150 mm.
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For installation of the unit, a metal flange plate (= launching plate, R) with G¾
process connection must be used which sufficiently covers the drill hole
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Ensure a minimum distance (= 80 mm) between the probe and the tank wall.
Adhere to the installation instructions
; if necessary, carry
out a tank adjustment.
When installed in plastic tanks, there may be deterioration caused by
electromagnetic interference from other devices. Possible remedies:
• Attach a large-surface, metal screen at the outside of the tank. Check
grounding concept; if necessary, change.
• Eliminate sources of interference or reduce emissions from the source
of interference taking electro-technical measures.
• Installation in a metal pipe within the plastic tank.
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Lightly grease the sensor thread with a suitable paste.
►
Insert the unit into the process connection.