Emerson 2200S Manuel D’Utilisation
46
Micro Motion
®
Model 2200S Transmitters
Configuring Process Measurement
If the transmitter detects slug flow:
•
A slug flow alarm is posted immediately.
•
During the slug duration period, the transmitter holds the mass flow rate at the last measured
pre-slug value, independent of the mass flow rate measured by the sensor. All outputs that
report mass flow rate and all internal calculations that include mass flow rate will use this
value.
pre-slug value, independent of the mass flow rate measured by the sensor. All outputs that
report mass flow rate and all internal calculations that include mass flow rate will use this
value.
•
If slugs are still present after the slug duration period expires, the transmitter forces the mass
flow rate to 0, independent of the mass flow rate measured by the sensor. All outputs that
report mass flow rate and all internal calculations that include mass flow rate will use 0.
flow rate to 0, independent of the mass flow rate measured by the sensor. All outputs that
report mass flow rate and all internal calculations that include mass flow rate will use 0.
•
When process density returns to a value within the slug flow limits, the slug flow alarm is
cleared and the mass flow rate reverts to the actual measured value.
cleared and the mass flow rate reverts to the actual measured value.
Note: The slug flow limits must be entered in g/cm
3
, even if another unit has been configured for
density. Slug flow duration is entered in seconds.
Note: Raising the low slug flow limit or lowering the high slug flow limit will increase the possibility
of slug flow conditions. Conversely, lowering the low slug flow limit or raising the high slug flow limit
will decrease the possibility of slug flow conditions.
of slug flow conditions. Conversely, lowering the low slug flow limit or raising the high slug flow limit
will decrease the possibility of slug flow conditions.
Note: If slug flow duration is set to 0, the mass flow rate will be forced to 0 as soon as slug flow is
detected.
detected.
Configuration
To configure slug flow parameters:
•
Using the Communicator, select
Detailed Setup > Config Fld Dev Var > Density
.
•
Using ProLink II, click
ProLink > Configuration > Density
.
Note: You cannot configure slug flow parameters with the display.
4.8
Configuring temperature measurement
The temperature measurement parameters control how the flowmeter measures and reports
temperature. You must configure:
temperature. You must configure:
•
Temperature measurement units
•
Temperature damping
Note: If you use the display, you can configure only the temperature measurement unit.
4.8.1
Temperature measurement units
The default temperature measurement unit is °C. See Table 4-7 for a complete list of temperature
measurement units.
measurement units.