CiDRA Use of Foundation Fieldbus Protocol with SONARtrac Transmitters - Manual (Page 22)

Table 3 Transducer Block Configurations (Page 9)
FLOW_WINDOW_OVERLAP
Unsigned
Long
R/W
Define overlap of FFT windows. This value is normally
set by DSP to half of NFFT.
FLOW_WINDOW_AVERAGES
Unsigned
Long
R/W
Default values are normally OK. In general* for slower
flow rates* use more FFT averages* for faster flow
rates* use fewer FFT averages. This parameter affects
the number of blocks used (there is a 20 block
maximum due to DSP memory limitations). Use with
caution.
FLOW_CALIBRATION
FLOW_CAL_COEFF_C0 Float R/W Volumetric flow calibration coefficient C0.
FLOW_CAL_COEFF_C1 Float R/W Volumetric flow calibration coefficient C1.
FLOW_CAL_COEFF_C2 Float R/W Volumetric flow calibration coefficient C2.
SOS_ALGORITHM
SOS_SAMPLE_FREQ Float R/W
Set sample frequency for SOS mode. This parameter
must be set for SOS* and overrides the
SAMPLE_FREQ setting if running in SOS mode.
Enter one of the following: 3906.25* 2055.921.
SOS_FREQ_MIN Float R/W
Minimum frequency to use for SOS calculation.
Typically in the 100 to 500hz range. Depends upon the
data quality as seen on the k-w plot. SOS_FREQ_MIN
and SOS_FREQ_MAX set the frequency range over
which the SOS calculation will be performed. The larger
this range* the longer the calculations will take.
SOS_FREQ_MAX Float R/W
Maximum frequency to use for SOS calculation.
Typically in the 800 to 1500hz range. Depends upon
the data quality as seen on the k-w plot.
SOS_FREQ_MIN and SOS_FREQ_MAX set the
frequency range over which the SOS calculation will be
performed. The larger this range* the longer the
calculations will take.
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