Note
You can set URV below LRV. For example, you can set URV to 50 and LRV to 100.
The mA Output uses a range of 4–20 mA to represent mA Output Process Variable. Between LRV and URV,
the mA Output is linear with the process variable. If the process variable drops below LRV or rises above URV,
the transmitter posts an output saturation alert.
10.2.3 Configure Added Damping
ProLink III Device Tools → Configuration → I/O → Outputs → mA Output → mA Output 1 → Added Damping
Device Tools → Configuration → I/O → Outputs → mA Output → mA Output 2 → Added Damping
Field communicator Configure → Manual Setup → Inputs/Outputs → mA Output 1 → mA Output Settings → PV Added
Damping
Configure → Manual Setup → Inputs/Outputs → mA Output 2 → mA Output Settings → SV Added
Damping
Added Damping controls the amount of damping that will be applied to the mA output.
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.
Added Damping affects the reporting of mA Output Process Variable through the mA output only. It does
not affect the reporting of that process variable via any other method (e.g., a frequency output or digital
communications), or the value of the process variable used in calculations.
Note
Added Damping is not applied if the mA output is fixed (for example, during loop testing) or if the mA output
is reporting a fault. Added Damping is applied while sensor simulation is active.
Procedure
Set Added Damping to the desired value.
The default value is 0.0 seconds. The range is 0.0 to 440 seconds.
When you specify a value for Added Damping, the transmitter automatically rounds the value down to the
nearest valid value.
Interaction between mA Output Damping and process variable damping
When mA Output Process Variable is set to one of the primary process variables (specific gravity, molecular
weight, or relative density), or to temperature, Added Damping interacts with Density Damping or
Temperature Damping.
Damping interaction
Configuration:
• mA Output Process Variable = Specific Gravity (Gas)
• Density Damping = 1 second
• Added Damping = 2 seconds
Configuration and Use Manual Integrate the meter with the control system
MMI-20020954 March 2021
Configuration and Use Manual 89
To Next Page
Loading...
