Emerson Micro Motion SGM Series - Configure Added Damping

• Set LRV ≥ LSL (lower sensor limit).
• Set URV ≤ USL (upper sensor limit).
• Set these values so that the difference between URV and LRV is ≥ Min Span (minimum span).
Defining URV and LRV within the recommended values for Min Span, LSL, and USL ensures that the
resolution of the mA output signal is within the range of the bit precision of the D/A converter.
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
Overview
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.
Integrate the meter with the control system
100 Micro Motion
®
Gas Specific Gravity Meters (SGM)