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You know how to adjust the vortex flowmeter amplifier gain and trigger

Vortex flowmeter amplifier gain adjustment
In general, there is no need to adjust the gain of the amplifier unless after replacing the sensor. The amplifier gain is adjusted by an AMP potentiometer on amplifier board A, and the amplified eddy current waveform is monitored on an oscilloscope. At the minimum flow rate, the peak value of the eddy current waveform is approximately 100 mVP-P.
Vortex flowmeter trigger level adjustment
An increase in the trigger level (sensitivity of the pulse generation) reduces the sensitivity of the flow. When there is no liquid flowing in the pipe, due to the vibration of the pipeline, noise occurs in the pulsating flow, and abnormal pulse generation can be effectively processed by increasing the trigger level.
The trigger level can be adjusted by the TRG potentiometer on the amplifier board, and the peak of the amplified eddy current waveform can be converted into a pulse whenever it exceeds a predetermined trigger level. Therefore, the flow sensitivity is reduced by increasing the trigger level.
When the trigger level 80mVP-P is changed to 350mVP-P, the sensitivity of the result will be 80/350=1/4.4 (sensitivity ratio) times.
When the sensitivity is changed, the resulting minimum flow (measurable low limit flow) is approximately 1/(the square of the sensitivity is multiplied by the standard minimum flow).

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