Function And System Design; Measuring Principle; Measuring System - Endress+Hauser Soliphant M FTM50 Technical Information

Measuring principle

Measuring system

4

Function and system design

A piezoelectric drive excites the tuning fork of Soliphant M FTM50, FTM51 and FTM52 to its resonance
frequency. If medium covers the tuning fork, the fork's vibrating amplitude changes (the vibration is damped).
Soliphant M's electronics compare the actual amplitude with a target value and indicates whether the tuning
fork is vibrating freely or whether it is covered by medium.
A
A = amplitude
The components of the measuring system depend on the electronic insert selected.
Level limit switch
Soliphant M FTM with electronic versions
FEM51, FEM52, FEM54
Level sensor
Soliphant M FTM with electronic versions
FEM55, FEM57, FEM58
for connecting to a separate switching unit
or an isolating amplifier
e.g. Nivotester FTL325N, FTL375N (NAMUR)
or FTL325P, FTL375P (PFM)
Soliphant M FTM50, FTM51, FTM52
A
t
FEM51/52/54
FEM55/57/58
t
L00-FTM5xxxx-15-06-xx-xx-001
L00-FTM5xxxx-15-05-xx-xx-000
Ex i
Switching unit
PLC
Isolating
amplifier
Segment
coupler
E X
E X
L00-FTM5xxxx-15-05-xx-en-000
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