Levelflex FMP56, FMP57
20 Endress+Hauser
Influence of ambient
temperature
The measurements are carried out in accordance with EN 61298-3
• digital (HART, PROFIBUS PA, FOUNDATION Fieldbus): average T
K
= 0.6 mm/10 K
• analog (current output):
– zero point (4 mA): average T
K
= 0.02 %/10 K
– span (20 mA): average T
K
= 0.05 %/10 K
Operating conditions: Installation
Suitable mounting position
A0012851-DE
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").
Additional conditions
• When mounting in the open: Use a weather protection cover (1)
• In metallic vessels: Do not mount the probe in the center of the vessel (2).
• 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.
• Check the probe regularly for defects.
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 and the wall.
Wall and pipe mounting
Endress+Hauser offers a mounting bracket for installing the device on pipes or on walls.
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