Applications With Restricted Mounting Space - Endress+Hauser Levelflex FMP51 Technical Information

Levelflex FMP51, FMP52, FMP54
Applications with restricted
mounting space
Endress+Hauser
Mounting distances
• Distance (A) between wall and rod or rope probe:
– for smooth metallic walls: > 50 mm (2")
– for plastic walls: > 300 mm (12") mm to metallic parts outside the vessel
– for concrete walls: > 500 mm (20") , otherwise the available measuring range may be reduced.
• Distance (B) between rod or rope probe and internal fittings in the vessel: > 300 mm (12")
• Distance (C) from end of probe to bottom of the vessel: > 10 mm (0.4").
For coax probes the distance to the wall and to internal fittings is arbitrary.
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 with remote sensor
The device version with a remote sensor is suited for applications with restricted mounting space. In this case
the electronics housing is mounted at a separate position from which it is easier accessible.
r = 100 mm (4")
min
6 Nm
A Angled plug at the probe
B Angled plug at the electronics housing
A
6 Nm
r = 100 mm (4")
min
B
6 Nm
6 Nm
A0014794
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