Emerson MMI-20019043 Manuel D’Utilisation

4.5.2

Configure slug flow parameters

Display

ProLink II

•

ProLink

 > Configuration > Density > Slug High Limit

•

ProLink

 > Configuration > Density > Slug Low Limit

•

ProLink

 > Configuration > Density > Slug Duration

ProLink III

Device Tools

 > Configuration > Process Measurement > Density

Field Communicator

•

Configure

 > Manual Setup > Measurements > Density > Slug Low Limit

•

Configure

 > Manual Setup > Measurements > Density > Slug High Limit

•

Configure

 > Manual Setup > Measurements > Density > Slug Duration

The slug flow parameters control how the transmitter detects and reports two-phase flow
(gas in a liquid process or liquid in a gas process).

1.

Set Slug Low Limit to the lowest density value that is considered normal in your
process.

Values below this will cause the transmitter to perform the configured slug flow
action. Typically, this value is the lowest density value in the normal range of your
process.

Gas entrainment can cause your process density to drop temporarily. To reduce the
occurrence of slug flow alarms that are not significant to your process, set Slug Low Limit
slightly below your expected lowest process density.

You must enter Slug Low Limit in g/cm

3

, even if you configured another unit for

density measurement.

The default value for Slug Low Limit is 0.0 g/cm

3

. The range is 0.0 to 10.0 g/cm

3

.

2.

Set Slug High Limit to the highest density value that is considered normal in your
process.

Values above this will cause the transmitter to perform the configured slug flow
action. Typically, this value is the highest density value in the normal range of your
process.

To reduce the occurrence of slug flow alarms that are not significant to your process, set Slug
High Limit

 slightly above your expected highest process density.

You must enter Slug High Limit in g/cm

3

, even if you configured another unit for

density measurement.

Configure process measurement

47