Configure process measurement
October 2022
Configuration and Use Manual
MMI-20019053
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.
Interaction between Density Damping and Added Damping
When the mA Output is configured to report density, both Density Damping and Added Damping are applied to the reported density value.
Density Damping controls the rate of change in the value of the process variable in transmitter memory.
Added Damping controls the rate of change reported via the mA Output.
If mA Output Process Variable is set to Density, and both Density Damping and Added Damping are set to non-zero values, density damping is applied first, and the added damping calculation is applied to the result of the first calculation. This value is reported over the mA Output.
4.5.4 Configure Density Cutoff
Display
ProLink III
Field Communicator
Not available
Device Tools → Configuration → Process Measurement → Density
Configure → Manual Setup → Measurements → Density → Density Cutoff
Density Cutoff specifies the lowest density value that will be reported as measured. All density values below this cutoff will be reported as 0.
Procedure
Set Density Cutoff to the value you want to use.
For most applications, the default setting (0.2 g/cm ³ ) is sufficient. The range is 0.0 g/cm ³ to 0.5 g/cm ³ .
Effect of Density Cutoff on volume measurement
Density Cutoff affects liquid volume measurement. If the density value goes below Density Cutoff , the volume flow rate is reported as 0. Density Cutoff does not affect gas standard volume measurement. Gas standard volume values are always calculated from the value configured for Standard Gas Density or polled value if configured for polled base density.
4.6 Configure temperature measurement
The temperature measurement parameters control how temperature data from the sensor is reported.
4.6.1 Configure Temperature Measurement Unit
Display
ProLink III
Field Communicator
OFF-LINE MAINT → OFF-LINE CONFG → UNITS → TEMP
Device Tools → Configuration → Process Measurement → Temperature
Configure → Manual Setup → Measurements → Temperature → Temperature Unit
42 Micro Motion 2700 Transmitters with Configurable Input/Outputs
Configuration and Use Manual
MMI-20019053
Configure process measurement
October 2022
Temperature Measurement Unit specifies the unit that will be used for temperature measurement.
Procedure
Set Temperature Measurement Unit to the option you want to use.
The default setting is Degrees Celsius.
Options for Temperature Measurement Unit
The transmitter provides a standard set of units for Temperature Measurement Unit . Different communications tools may use different labels for the units.
Unit description
Degrees Celsius
Degrees Fahrenheit
Degrees Rankine
Kelvin
°R
°K
Display
°C
°F
°R
°K
°C
°F
ProLink III
Label
Field Communicator degC degF degR
Kelvin
4.6.2 Configure Temperature Damping
Display
ProLink III
Field Communicator
Not available
Device Tools → Configuration → Temperature
Configure → Manual Setup → Measurements → Temperature → Temp Damping
Temperature Damping controls the amount of damping that will be applied to the line temperature value, when the on-board temperature data is used (RTD).
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.
Tip
Temperature Damping affects all process variables, compensations, and corrections that use temperature data from the sensor.
Procedure
Enter the value you want to use for Temperature Damping .
The default value is 4.8 seconds. For most applications, the default temperature damping setting is sufficient.
The range is 0.0 to 38.4 seconds.
Tip
• 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.
Configuration and Use Manual 43
