• LRV is the value of mA Output Process Variable represented by an output of 4 mA. The
default value for LRV depends on the setting of mA Output Process Variable.
• URV is the value of mA Output Process Variable represented by an output of 20 mA. The
default value for URV depends on the setting of mA Output Process Variable. Enter URV in
the measurement units that are configured for mA Output Process Variable.
Tip
For best performance:
• 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.
6.2.3 Configure Added Damping
Display Not available
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.
Integrate the meter with the control system
Configuration and Use Manual 81
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