
106
Using ProLink
®
Software with Micro Motion
®
Transmitters
Configure Menu: Transmitter Variables
continued
Internal damping
The damping value is the filter coefficient that approximates the time
required for the output to achieve 63% of its new value in response to a
step change at the input. The actual time depends on many factors,
including sensor type and density of the process fluid. The transmitter
rounds down the chosen damping value to the nearest available
programmed filter coefficient.
Table 9-11
lists programmed filter coefficients for internal damping on
process variables indicated by RFT9739, IFT9701, IFT9703, RFT9712,
and RFT9729 transmitters.
For an RFT9739, added damping can be placed on milliamp outputs
configured to indicate flow, temperature, or density. For more information
on milliamp outputs, see
Section 10.3
(page 112).
Table 9-11. Filter coefficients for internal damping on process variables
RFT9739
IFT9701
IFT9703
RFT9712/
RFT9729
Flow Density Temperature Flow Flow and density
0
0.1
0.2
0.4
0.8
1.6
3.2
6.4
12.8
25.6
51.2
102.4
204.8
409.6
819.2
1638.4
-
0.5
1
2
4
8
16
32
64
128
256
512
1024
2048
4096
8192
0
2
4
8
16
32
64
128
256
512
1024
2048
4096
8192
16384
32768
0.1
0.2
0.4
0.8
1.6
3.2
6.4
12.8
0.05
0.1
0.2
0.4
0.8
1.6
3.2
6.4
12.8
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