Endress+Hauser Levelflex FMP51 Operating Instructions Manual page 23

Levelflex FMP51, FMP52, FMP54 FOUNDATION Fieldbus
Endress+Hauser
Additional conditions
• When mounting in the open, a weather protection cover (1) may be installed to protect
the device against extreme weather conditions.
• In metallic vessels: Preferably do not mount the probe in the center of the vessel (2), as
this would lead to increased interference echoes.
If a central mounting position can not be avoided, it is crucial to perform an interference
echo suppresion(mapping) after the commissioning of the device.
• Do not mount the probe in the filling curtain (3).
• Avoid buckling the rope probe during installation or operation (e.g. through product
movement against silo wall) by selecting a suitable mounting location.
With suspended rope probes (probe end not fixed at the bottom) the distance
between the probe rope and internal fittings in the tank must not fall below 300 mm
(12") during the entire process. A sporadic contact between the probe weight and the
cone of the vessel, however, does not influence the measurement as long as the
dielectric constant of the medium is at least DC = 1.8.
When mounting the electronics housing into a recess (e.g. in a concrete ceiling),
observe a minimum distance of 100 mm (4 inch) between the cover of the terminal
compartment / electronics compartment and the wall. Otherwise the connection
compartment / electronics compartment is not accessible after installation.
Mounting
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