Electronic level sensor
LR7009
17
5.5.3 Installation in open tanks
u
For installation in open tanks, use a metal fixture to install the device. It serves as a launching plate
(R); minimum size: 150 x 150 mm for a square fixture, 150 mm diameter for a circular fixture: (
Ò
Accessories).
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Mount the device in the middle of the fixture. The distance D2 must not be below 40 mm, higher for
probe lengths > 70 cm and in case of heavy soiling.
D2
150 mm
R
R:
fixture / launching plate
D2:
distance to the fixture
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Ensure that the lower edge of the process connection is flush with the installation environment.
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Avoid non-flush installation.
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If necessary, use seals or washers to reach the required height.
5.5.4 Installation in plastic tanks
150 mm
R
R:
flange plate
To enable sufficient transfer of the measured signal, note in case of installation in plastic tanks
or metal tanks with plastic lid:
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There must be a hole of at least 150 mm in diameter in the plastic lid.
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For installation of the device, a metal flange plate (= launching plate R) must be used which
sufficiently covers the drill hole: (
Ò
Accessories).
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Ensure the minimum distance (= 80 mm) between rod and tank wall, higher for probe lengths
> 70 cm and in case of heavy soiling.
When installed in plastic tanks, there may be deterioration caused by electromagnetic
interference. Corrective measures:
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Apply a metal foil to the outside of the tank.
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Apply a shielding screen between the level sensor and other electronic devices.
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Operation with coaxial probe efficiently protects the device from electromagnetic
interference. Please note the restrictions regarding the application area.
5.6 Installation of the device with coaxial probe in the tank
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Seal the process connection:
•
For pipes with G¾ process connection:
slide the supplied seal onto the thread of the coaxial pipe.
