Endress+Hauser Levelflex FMP50 Technical Information page 25

Levelflex FMP50
Endress+Hauser
• Pipe diameter: > 40 mm (1.6") for rod probes
• Rod probe installation can take place up to a diameter size of 100 mm. In the event of larger diameters,
FMP51 with a coax probe is recommended.
• Side disposals, holes or slits and welded joints that protrude up to approx. 5 mm (0.2") inwards do not
influence the measurement.
• The pipe may not exhibit any steps in diameter.
• The probe must be 100 mm longer than the lower disposal.
• Within the measuring range, the probe must not get into contact with the pipe wall. If necessary, use a center
washer (see feature 610 of the product structure).
For bypasses with condensate formation (water) and a medium with low dielectric constant (e.g.
hydrocarbons):
In the course of time the bypass is filled with condensate up to the lower disposal and for low levels the
the level echo is superimposed by the condensate echo. Thus in this range the condensate level is measured
instead of the correct level. Only higher levels are measured correctly. To prevent this, position the lower
disposal 100 mm (4 in) below the lowest level to be measured and apply a metallic centering disk at the
height of the lower edge of the lower disposal.
With heat insulated tanks the bypass should also be insulated in order to prevent condensate formation.
Underground tanks
Use FMP51 with a coax probe for nozzles with large diameters in order to avoid reflections at the nozzle wall.
Installation at an angle
A0014142
A0014145
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