Fisher-Rosemount 3095FT, Manual

Page: 78 / 184

Rosemount Model 3095FT HART Flow Transmitter
4-30
Maintenance
Transmitter
Damping
The Model 3095FT has electronic damping that can change the
response time of the transmitter to smooth the process variable reading
when there are rapid input variations. Different damping values can be
entered for the DP, SP, and PT process variables. The following
damping values are available:
0.112 0.224 0.448 0.896 1.792 3.584 7.168
High damping values filter out process noise, but response time is
decreased. Low damping values increase response time, but process
noise can also be detected. The factory default damping value is 0.896.
To change the damping value, simply enter new values, then select Ok.
The User Interface immediately sends the new values to the
transmitter, then redisplays the “Set Transmitter Damping” screen. If a
new value is selected that is not available, the Model 3095FT
transmitter automatically selects the closest damping value, and
displays an operator message indicating the change.
Maintenance
Transmitter
PV Default Values
The PV Default Values screen sets the default values used by the Model
3095FT Transmitter to calculate flow and logging when the transmitter
is in “On-Line Maint. Use Default Values” mode. These values are also
used by the Model 3095FT for flow calculations during an over-range
condition. In addition, the PT Default Value is used for flow calculations
if the RTD connector is disabled (see page 4-15).
To change a default value, enter a new value, select the Unit, then click
Ok.
FIGURE 4-18. Damping Screen.
3
0
9
5
-3
095
00
10
FIGURE 4-19. PV Default Values
Screen.
3
095
-3
095
002
4