Tips
•
A high damping value makes the process variable appear smoother because the reported value
changes slowly.
•
A low damping value makes the process variable appear more erratic because the reported value
changes more quickly.
•
The combination of a high damping value and rapid, large changes in flow rate can result in
increased measurement error.
•
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
0
,
0.04
,
0.08
,
0.16
,
0.32
...
40.96
.
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.
4.1.3
Configure
Mass Flow Cutoff
ProLink III
Device Tools
>
Configuration
>
Process Measurement
>
Flow
Overview
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.
Procedure
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 value is 0.5% of the nominal flow rate of the attached sensor.
See the sensor specifications. Do not leave
Mass Flow Cutoff
to 0.0 g/sec.
Effect of
Mass Flow Cutoff
on volume measurement
Mass Flow Cutoff
does not affect volume measurement. Volume data is calculated from the
actual mass data rather than the reported value.
Configure process measurement
20
Micro Motion
®
LNG Series Meters
Summary of Contents for Micro Motion LNG Series
Page 1: ...Configuration and Use Manual MMI 20032809 Rev AA February 2017 Micro Motion LNG Series Meters ...
Page 6: ...Contents iv Micro Motion LNG Series Meters ...
Page 8: ...Getting Started 2 Micro Motion LNG Series Meters ...
Page 12: ...Before you begin 6 Micro Motion LNG Series Meters ...
Page 18: ...Quick start 12 Micro Motion LNG Series Meters ...
Page 20: ...Configuration and commissioning 14 Micro Motion LNG Series Meters ...
Page 50: ...Configure device options and preferences 44 Micro Motion LNG Series Meters ...
Page 56: ...Integrate the meter with the control system 50 Micro Motion LNG Series Meters ...
Page 58: ...Complete the configuration 52 Micro Motion LNG Series Meters ...
Page 60: ...Operations maintenance and troubleshooting 54 Micro Motion LNG Series Meters ...
Page 74: ...Measurement support 68 Micro Motion LNG Series Meters ...
Page 94: ...Using ProLink III with the transmitter 88 Micro Motion LNG Series Meters ...
Page 98: ...Default values and ranges 92 Micro Motion LNG Series Meters ...
Page 99: ...Default values and ranges Configuration and Use Manual 93 ...
