Aalborg Vortex User Manual
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The Flow Linearization algorithm may be used to improve linearity of the flow
measurement. The Flow Linearization table is built during factory calibration pro-
cedure and stored in the device EEPROM. The Flow Linearizer can be used with all
flow measurement algorithms. By default unit shipped from the factory with dis-
abled Flow Linearizer.
5.3.7.2 Submenu L2 FFT DSP Menu
FFT Trigger Level is used to define lowest amplitude of the harmonic to be con-
sidered as valid vortex signal. When set to zero the FFT Trigger Level will be deter-
mine automatically as ¼
of the signal amplitude.
FFT Sample/Second defines the number of samples per second for Analog to
Digital Converter (ADC) taken from a continuous analog signal to make a discreet
signal. This is tabular entry. When set to Automatic mode, the sample rate will be
switched automatically to keep best resolutions (default settings).
NOTE: Do not adjust FFT DSP parameter unless directed to do so by a
AALBORG Technical Support Representative.