CiDRA Use of Foundation Fieldbus Protocol with SONARtrac Transmitters - Manual (Page 26)

Table 3 Transducer Block Configurations (Page 13)
FILTER_FLOW_NR_FILTER_MAGNITUDE_SELECTION
Unsigned
Char
R/W
Selects flow noise reduction filter magnitude.
FLOW_DAMPING_FILTER
FILTER_FLOW_1ST_ORDER_DAMPING_FILTER_ENABLE
Unsigned
Char
R/W
Enables or disables flow 1st order damping filter.
FILTER_FLOW_DAMPING_TAU Float R/W Sets tau value for flow 1st order damping filter.
FLOW_SPIKE_FILTER
FILTER_FLOW_SPIKE_FILTER_ENABLE
Unsigned
Char
R/W
Enables or disables flow spike filter.
FILTER_FLOW_SPIKE_FILTER_NO_FLOW_LENGTH
Unsigned
Char
R/W
Defines the required number of consecutive
measurements with good quality before a measurement
is deemed valid and displayed.
FILTER_FLOW_SPIKE_FILTER_LENGTH
Unsigned
Char
R/W
This parameter is used when the device is 'Holding' a
previous measurement due to a new measurement with
bad quality. The definition of this parameter is the
required number of consecutive measurements with bad
quality before the device enters the 'No Flow' state and
displays dashes.
FILTER_FLOW_SPIKE_FILTER_UP_COUNT
Unsigned
Char
R/W
Each time a measurement with bad quality is made 'Up
Count' is added to the quality counter. If the counter
becomes less than or equal to zero then the present
measurement is displayed. If the quality counter
becomes greater than or equal to ('Filter Length' x 'Up
Count') then the device is forced into a 'No Flow'
condition and displays dashes.
FILTER_FLOW_SPIKE_FILTER_DOWN_COUNT
Unsigned
Char
R/W
Each time a measurement with good quality is made
'Down Count' is subtracted from the quality counter. If
the quality counter becomes less than or equal to zero
then the present measurement is displayed. If the
quality counter becomes greater than or equal to ('Filter
Length' x 'Up Count') then the device is forced into a 'No
Flow' condition and displays dashes.
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