Function And System Design; Measuring Principle; Measuring System - Endress+Hauser Soliphant T FTM20 Technical Information

Soliphant T FTM20, FTM21

Measuring principle

Measuring system

Endress+Hauser

Function and system design

A piezoelectric drive excites the vibrating rod of Soliphant T FTM20, FTM21 to its resonance frequency.
If medium covers the vibrating rod, the rod's vibrating amplitude changes (the vibration is damped).
Soliphant's electronics compare the actual amplitude with a target value and indicates whether the vibrating
rod is vibrating freely or whether it is covered by medium.
A
A = amplitude
Soliphant T is a compact electronic switch.
Thus, the entire measuring system only consists of:
• Soliphant T FTM20 or FTM21 with FEM22 or FEM24 electronic insert
• a supply point and
• the connected control systems, switching units, signalling systems (e.g. lamps, horns, PCS, PLC, etc.)
A
t
E X E X
t
L00-FTM2xxxx-15-06-xx-xx-001
U–
...
+ –
U–
~
L00-FTM2xxxx-14-06-xx-xx-001
3