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Reference Manual
00809-0100-4860, Rev BC
Section 4: Operation
January 2013
Operation
The Low Pass Filter corner frequency variable offers two modes for adjustment:
Increase filtering
Increase sensitivity
Trigger level
Trigger Level is configured to reject noise within the flow range while allowing normal amplitude
variation of the vortex signal. Signals of amplitude lower than the Trigger Level setting are
filtered out. The factory setting optimizes noise rejection in most applications. Trigger Level
offers two modes for adjustment:
Increase filtering
Increase sensitivity
Note
Do not adjust this parameter unless directed to do so by a Rosemount Technical Support
Representative.
Filter restore
Filter Restore enables you to return all of the signal conditioning variables to their default values.
Should the filter settings get confused, select Filter Restore to restore the default settings and
provide a new starting point.
Damping
Damping function changes the response time of the flowmeter to smooth variations in output
readings caused by rapid changes in input.
The appropriate damping setting can be determined based on the necessary response time,
signal stability, and other requirements of the loop dynamics in your system.
PV damping
The default damping value is 2.0 seconds. Damping can be reset to any value between 0.2 and
255 seconds when PV is a flow variable or 0.4 to 32 seconds when PV is Process Temperature.
Flow damping
The default damping value is 2.0 seconds. Flow Damping can be reset to any value between 0.2
and 255 seconds.
Field Comm. 1, 4, 3, 2, 5
Field Comm. 1, 4, 3, 3
Field Comm. 1, 4, 3, 4
Field Comm. 1, 4, 3, 4, 1
Field Comm. 1, 4, 3, 4, 2