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CoriolisMaster FCB400, FCH400
CORIOLIS MASS FLOWMETER | OI/FCB400/FCH400-EN REV. E
… 9 Operation
Measurement of standard volumes
Coriolis mass flowmeters can only measure the mass flow of gaseous measuring media.
The operating density of gases is too low to be measured. Consequently the flowmeter is also unable to measure the operating
volume.
However, an appropriate standard volume can be calculated by entering a fixed density for the measuring medium.
The transmitter uses the measured mass flow and the standard density entered to calculate the standard volume flow of the
measuring medium.
(standard volume = mass / standard density).
Configuration of the standard volume measurement using the LCD indicator
Perform the following steps to activate the calculation of standard volumes for gases:
Menu
/
parameter
Setting
Description
1.
... / Device Setup / ...Transmitter / Density Mode
Density Fixed Value
Set the ‘Density Mode’ parameter to ‘Density Fixed Value’.
2.
... / Device Setup / ...Transmitter / Density Fixed Value
e. g. 1.293 g/l for air
Set the parameter ‘Density Fixed Value’ to the standard density of
the measuring medium.
3.
... / Device Setup / ...Transmitter / ...Units / Unit
Volumeflow Qv
e. g. xx/yy for customer unit Set the parameter ‘Unit Volumeflow Qv’ to the desired unit for
volume flow.
e. g. xx/yy for customer unit, see step 4.
... / Device Setup / ...Transmitter / ...Units / Unit Vol.
Totalizer
e. g. xx/yy for customer unit Set the parameter ‘Unit Vol. Totalizer’ to the desired unit for the
volume totalizer.
e. g. xx/yy for customer unit, see step 4.
... / Device Setup / ...Transmitter / ...Units / Density
e.g. g/l
Set the parameter ‘Unit Vol. Totalizer’ to the desired density unit.
Note
To differentiate between the “Fixed density” and “Standard volume calculation” operating modes, we recommend using a customer unit for the volume flow and
volume totalizer units.
4.
... / Device Setup / ...Transmitter / ...Custom Units /
Volumeflow Qv Name
e. g. ‘m3/h(qn)’
Set the parameter ‘Volumeflow Qv Name’ to the desired names for
the standard volume flow. Maximum 8 characters!
... / Device Setup / ...Transmitter / ...Custom Units /
Volumeflow Qv Factor
e. g. ‘3.6’ with reference to
l/s
Set the parameter ‘Volumeflow Qv Factor’ to the desired factor for
the standard volume flow. The factor refers to the unit of
liter/second (l/s)
... / Device Setup / ...Transmitter / ...Custom Units /
Volume Tot. Name
e. g. ‘m3(qn)’
Set the parameter ‘Volume Tot. Name’ to the desired names for the
unit of the standard volume totalizer. Maximum 8 characters!
... / Device Setup / ...Transmitter / ...Custom Units /
Volume Tot. Factor
e. g. ‘0.001’ with reference
to l
Set the parameter ‘Volume Tot. Factor’ to the desired factor for the
unit of the standard volume totalizer. The factor refers to the unit of
liter (l)
5.
... / Device Setup / ...Sensor / Qv Max
e. g. ‘1000 m3/h(qn)’
Set the parameter ‘Volume Tot. Factor’ to the desired upper range
value.
6.
... / Input / Output / ...Curr.Out 31 / 32 / Uco / Output
Value
e.g. ‘Volume Flow [%]’
Allocate the process variables to the desired outputs of the
transmitter. See
Menu: Input / Output
on page 107 for further
information.
7.
... / Display / ...Operator Pages / ...Operator Page 1 / 1st
Line
e.g. ‘Volume Flow [unit]’
Allocate the process variables to the operator screens of the LCD
display of the transmitter. See
Menu: Display
on page 106 for
further information.
8.
... / Process Alarm / ...Alarm Limits / Density Max
Limit value < than
parameter ‘Density Fixed
Value’
Set the parameter ‘Density Max’ to a value which is below the
‘Density Fixed Value’ parameter. This will prevent the ‘Density
exceeds min/max limits.’ error message from appearing.
