Endress+Hauser prolevel FMC 661 - Application

1.1 Application
The Prolevel FMC 661 is designed for level measurement with a capacitance probe or
hydrostatic pressure sensor. A second channel allows level limit detection with a vibration
sensor, i.e. Liquiphant or Soliphant, or capacitance probe. The applications described
in this manual are as follows:
• Level or volume measurement …Chapter 4
• Level limit detection …Chapter 5
• Level measurement with automatic calibration correction …Chapter 5.
Prolevel transmitters may also be used for applications in explosion hazardous areas
and possess intrinsically-safe sensor circuits conforming to EEx ia IIC. A list of certificated
combinations is to be found in »Notes on Safety« preceding this chapter.
Endress+Hauser
PROLEVEL
FMC661
123.4
1A
1B
2A
2B
3
HV
+
E
_
1
1
2
0/4...20 mA
limit relays
Prolevel FMC 661
transmitter
BA142_01
Liquids
Bulk solids
Channel 1
hazardous area safe area
or
or
Channel 1
alarm
relay
Fig. 1.1:
Standard application showing
Prolevel FMC 661 controlling
level measurement
➀ Capacitance probe
➁ Hydrostatic probe
Endress+Hauser
PROLEVEL
FMC 661
123.4
1A
1B
2A
2B
3
HV
+
E
_
1
2
Min
hazardous area
BA142_02
Max
safe area
FMC 661
Fig. 1.2:
Left:
Prolevel FMC 661 with
Liquiphant limit switch
➀ Maximum fail-safe mode
➁ Minumum fail-safe mode
Right:
Prolevel FMC 661 with
simultaneous level measurement
and limit switching
➀ Capacitance level probe
➁ Hydrostatic level sensor
➂ Limit switch
The same arrangement is used
for automatic calibration
correction
or
channel 2
Endress+Hauser
PROLEVEL
FMC661
123.4
1A
1B
2A
2B
3
HV
+
E
_
1
3
2
channel 2 limit
switch
channel 1 level
BA142_03
hazardous area safe area
or
FMC 661
Chapter 1: Introduction Prolevel FMC 661
6 Endress+Hauser