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Configuration and Use Manual 39
Optional Transmitter Configuration
Optional Configuration Using the FillerFiller ConfigurationUsing the Transmitter
6.6 Configuring the damping values
A damping value is a period of time, in seconds, over which the process variable value will change to
reflect 63% of the change in the actual process. Damping helps the transmitter smooth out small,
rapid measurement fluctuations.
• A high damping value makes the output appear to be smoother because the output must change
slowly.
• A low damping value makes the output appear to be more erratic because the output changes
more quickly.
When you specify a new damping value, it is automatically rounded down to the nearest valid
damping value. Flow, density, and temperature have different valid damping values. Valid damping
values are listed in Table 6-2.
For the Model 1500 transmitter with the filling and dosing application, the default damping value for
flow has been set to 0.04 seconds. For most filling and dosing applications, the default flow damping
value is used. Contact Micro Motion customer support before changing the flow damping value.
Before setting the damping values, review Sections 6.6.1 through 6.6.3 for information on how the
damping values interact with other transmitter measurements and parameters.
6.6.1 Damping and volume measurement
When configuring damping values, be aware that volume measurement is derived from mass and
density measurements; therefore, any damping applied to mass flow and density will affect volume
measurements. Be sure to set damping values accordingly.
6.6.2 Interaction with the added damping parameter
The mA output has a damping parameter – added damping. If damping is configured for flow, the mA
output is configured for mass flow or volume flow, and added damping is also configured for the mA
output, the effect of damping the process variable is calculated first, and the added damping
calculation is applied to the result of that calculation.
See Section 4.5.5 for more information on the added damping parameter.
Table 6-2 Valid damping values
Process variable Update rate
(1)
(1) See Section 6.6.3.
Valid damping values
Flow (mass and volume) Normal (20 Hz) 0, .2, .4, .8, ... 51.2
Special (100 Hz) 0, .04, .08, .16, ... 10.24
Density Normal (20 Hz) 0, .2, .4, .8, ... 51.2
Special (100 Hz) 0, .04, .08, .16, ... 10.24
Temperature Not applicable 0, .6, 1.2, 2.4, 4.8, ... 76.8