Commissioning Levelflex M FMP41C with HART/4...20 mA
42 Endress + Hauser
bypass / pipe
The "bypass / pipe" option is designed especially for the installation of probes in a bypass or a
stilling well. If this option is selected, the upper blocking distance is preset to 100 mm.
coax probe
Select the "coax probe" option when using a coaxial probe. When this setting is made, the
evaluation is adapted to the high sensitivity of the coax probe. This option should, therefore, not be
selected when using rope or rod probes.
concrete wall
The "concrete wall" option takes into account the signal-damping property of concrete walls when
mounting with < 1 m distance to the wall.
Function "medium property" (003)
This function is used to select the dielectric constant.
Selection:
• unknown
• 1.4 ... 1.6 (1,4 for installation in metallic pipes)
• 1.6 ... 1.9
• 1.9 ... 2.5
• 2.5 ... 4.0
• 4.0 ... 7.0
•> 7.0
The lower group applies to very loose or loosened bulk solids. Reduction of the max. possible
measuring range by means of:
• extremely loose surfaces of bulk solids, e.g. bulk solids with low piled density when filled
pneumatically.
• Build-up, primarily of moist products.
!
Note!
Due to the high diffusion rate of ammonia it is recommended to use the FMP45 with gas-tight
bushing for measurements in this medium.
⇒
ENDRESS + HAUSER
E
+
–
Media group DC (εr) Typical liquids Typ. measuring range
1 1.4...1.6 – Condensed gases, e.g. N
2
, CO
2
4 m (157"), when installed in metallic pipes
2 1.6...1.9
– Liquefied gas, e.g. Propane
–Solvent
– Frigen / Freon
–Palm oil
9 m (354")
3 1.9...2.5 – Mineral oils, fuels 12 m (472")
4 2.5...4
– Benzene, styrene, toluene
–Furan
– Naphthalene
16 m (629")
5 4...7
– Chlorobenzene, chloroform
– Cellulose spray
– Isocyanate, aniline
25 m (984")
6 >7
– Aqueous solutions
–Alcohols
– Acids, alkalis
30 m (1181")
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