ONICON F-2600 - Manual (Page 106)

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F-2600 & F-2700 Vortex Flow Meter Manual 02/15 - 0808-7 / 19204 Page 106
4. The vortex coefficient Ck may be incorrectly set. The Ck is a value in the equation used
to determine if a frequency represents a valid vortex signal given the fluid density and
signal amplitude. In practice, the Ck value controls the adaptive filter, fi, setting. During
flow, view the f and fi values in the first level of the hidden diagnostics. The fi value
should be approximately 10-20% higher than the f value. If you raise the Ck setting in
the Calibration Menu, then the fi value will increase. The fi is a low pass filter, so by
increasing it or lowering it, you can alter the range of frequencies that the meter will
accept. If the vortex signal is strong, the fi value will increase to a large number – this is
correct.
Figure 54. Electronics Stack Sensor Connections
Figure 55. Remote Feed Through Board Sensor Connections
VORTEX
TEMPERATURE
PRESSURE
VORTEX
TEMPERATURE PRESSURE