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CoriolisMaster FCB400, FCH400
CORIOLIS MASS FLOWMETER | OI/FCB400/FCH400-EN REV. E
… 6 Installation
… General installation conditions
Liquid measuring media
Observe the following points to avoid measuring errors:
• The meter tubes must always be completely filled with
the measuring medium.
• The gases dissolved in the measuring medium must not
leak out. To safeguard this, a minimum back pressure of
0.2 bar (2.9 psi) is recommended.
• The minimum vapor pressure of the measuring medium
must be maintained when there is negative pressure in
the meter tube or when liquids are gently simmering.
• During operation, there must be no phase transitions in
the measuring medium.
Vertical installation
G11607
A
B
1
2
3
4
5
1
Supply tank
2
Sensor
3
Piping constriction / orifice
4
Turn-off device
5
Filling tank
Figure 9: Vertical installation
A
For vertical installation in a riser, no special measures are
required.
B
For vertical installation in a downpipe, a piping constriction
or an orifice must be installed below the sensor. Doing this
prevents the sensor from draining during the measurement.
Horizontal installation
G11608-01
≥ 30°
A
B
Figure 10: Horizontal installation
A
For liquid measuring media and horizontal installation, the
transmitter and terminal box must point upward. If a self-
draining installation is required, the sensor must be mounted
at an incline of
≥
30°.
B
Installing the sensor at the highest point of the piping leads
to an increased number of measuring errors due to the
accumulation of air or the formation of gas bubbles in the
meter tube.