Emerson 9739 Manuel D’Utilisation

In some circumstances, both Flow Damping and Added Damping are applied to the reported
mass flow value.

Flow Damping

 controls the rate of change in flow process variables. Added Damping controls

the rate of change reported via the mA output. If mA Output Process Variable is set to Mass
Flow Rate

, and both Flow Damping and Added Damping are set to non-zero values, flow

damping is applied first, and the added damping calculation is applied to the result of the
first calculation.

4.1.3

Configure Mass Flow Cutoff

Display

ProLink II

ProLink

 > Configuration > Flow > Mass Flow Cutoff

Field Communicator Configure > Manual Setup > Measurements > Flow > Mass Flow Cutoff

Mass Flow Cutoff

 specifies the lowest mass flow rate that will be reported as measured. All

mass flow rates below this cutoff will be reported as 0.

Set Mass Flow Cutoff to the value you want to use.

The default value for Mass Flow Cutoff is 0.0 g/sec or a sensor-specific value set at the
factory. The recommended setting is 0.05% of the sensor's rated maximum flow rate or a
value below the highest expected flow rate. Do not set Mass Flow Cutoff to 0.0 g/sec.

Mass Flow Cutoff

 does not affect volume measurement. Volume data is calculated from the

actual mass data rather than the reported value.

Mass Flow Cutoff

 defines the lowest mass flow value that the transmitter will report as

measured. AO Cutoff defines the lowest flow rate that will be reported via the mA output. If
mA Output Process Variable

 is set to Mass Flow Rate, the mass flow rate reported via the mA

output is controlled by the higher of the two cutoff values.

Mass Flow Cutoff

 affects all reported values and values used in other transmitter behavior

(e.g., events defined on mass flow).

AO Cutoff

 affects only mass flow values reported via the mA output.

Configure process measurement

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