Endress+Hauser silometer FMC 671 Z - Application

1.1 Application
The Silometer FMC 671 Z/676 Z is designed for level measurement with a capacitance,
impedance or hydrostatic pressure probe. A second channel allows level limit detection
with a capacitance/impedance probe or vibration sensor. The applications described in
this manual are as follows:
• Continuous level measurement …Chapter 4
• Volume measurement in horizontal or conical tanks …Chapter 5
• Level limit detection …Chapter 8
• Continuous level measurement with automatic correction …Chapter 8.
Silometer transmitters may also be used for applications in explosion hazardous areas
and possess intrinsically-safe sensor circuits conforming to EEx ia IIC and IIB. A list of
certificated combinations is to be found in »Notes on Safety« preceding this chapter.
0/4...20 mA,
0/2...10V
output
Min./max.
relays
Silometer
FMC 671 Z/
676 Z
transmitter
BA063E01
Liquids
Bulk solids
Channel 1
Ex non-Ex
or
or
Fig. 1.1:
Standard application with
Silometer FMC 671 Z/676 Z
➀ Capacitance probe
➁ Deltapilot S
➁
Min
Relays
Ex
BA063E02
➀
Max
non-Ex
Fig. 1.2:
Left:
Silometer FMC 671 Z with
limit switch
➀ Maximum fail-safe
➁ Minumum fail-safe
Right:
Silometer FMC 671 Z with
continuous level measurement
and limit switching
➀ Level measurement
➁ Limit switch
or
Channel 2
Level
Channel 2
Channel 1
BA063E03
Ex non-Ex
Silometer FMC 671 Z/676 Z Chapter 1: Introduction
6