•
The two-phase flow alert is deactivated, but remains in the active alert log until it is
acknowledged.
If the two-phase flow condition does not clear before
Two-Phase Flow Timeout
expires, the
outputs that represent flow rate report a flow rate of 0.
If
Two-Phase Flow Timeout
is set to 0.0 seconds, the outputs that represent flow rate will
report a flow rate of 0 as soon as two-phase flow is detected.
4.5.3
Configure density damping
ProLink III
Device Tools
>
Configuration
>
Process Measurement
>
Density
Overview
Density Damping
controls the amount of damping that will be applied to the line density
value.
Damping is used to smooth out small, rapid fluctuations in process measurement.
Damping
Value
specifies the time period (in seconds) over which the transmitter will spread changes
in the process variable. At the end of the interval, the internal value will reflect 63% of the
change in the actual measured value.
Procedure
Set
Density Damping
to the value you want to use.
The default value is 1.28 seconds. The range is 0 to 60 seconds.
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.
•
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.
The value you enter is automatically rounded down to the nearest valid value. The valid
values for
Density Damping
are:
0
,
0.04
,
0.08
,
0.16
,
0.32
...
40.96
.
Effect of density damping on volume measurement
Density Damping
affects liquid volume measurement. Liquid volume values are calculated
from the damped density value rather than the measured density value.
Density Damping
does not affect gas standard volume measurement.
Configure process measurement
Configuration and Use Manual
33
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 ...