Emerson Model 1700 Manuel D’Utilisation

•

Whenever the damping value is non-zero, the reported measurement will lag the actual
measurement because the reported value is being averaged over time.

•

In general, lower damping values are preferable because there is less chance of data loss, and less
lag time between the actual measurement and the reported value.

•

For gas applications, Micro Motion recommends setting Flow Damping to 2.56 or higher.

The value you enter is automatically rounded down to the nearest valid value. Valid
damping values are shown in the following table.

Valid values for Flow Damping

Update Rate

Standard

Normal

0

, 0.2, 0.4, 0.8, ... 51.2

Special

0

, 0.04, 0.08, 0.16, ... 10.24

Enhanced

Not applicable

0

, 0.2, 0.4, 0.8, ... 51.2

Effect of Flow Damping on volume measurement

Flow Damping

 affects volume measurement for liquid volume data. Flow Damping also affects

volume measurement for gas standard volume data. The transmitter calculates volume
data from the damped mass flow data.

Interaction between Flow Damping and Added Damping

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 (standard)

Chinese-language
display

Offline Maintain

 > Configuration > Low Flow Cutoff > Mass Flow Cutoff

ProLink II

ProLink

 > Configuration > Flow > Mass Flow Cutoff

ProLink III

Device Tools

 > Configuration > Process Measurement > Flow

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

Configure process measurement

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