NI 9401 for measuring flow rate

[ViniCampos]

Hello everybody

I am here looking for a help. I am a beginner through LabView and DAQ equipment.

I have a NI 9401 and a flow meter, they are already wired, and it's already counting the edges.

I have the number of pulses/liter, but I need to get the number of edges that were counted per second as well for each loop, like a frequency, to make the conversion through the equation.

I do not know if I am doing this in the better manner, so I accept suggestions.

Thank you all in advance

Greetings from Germany

[GerdW · Accepted solution]

Hi (und hallo) Vini,

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@ViniCampos wrote:

I have the number of pulses/liter, but I need to get the number of edges that were counted per second as well for each loop, like a frequency, to make the conversion through the equation.

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• Let the loop iterate once per second.
• Keep the last counter value in a shift register.
• Calculate the difference of current and last counter value to get the number of pulses for the last second.
• Do your conversion to get the flow rate…

[ViniCampos]

Thank you...

It worked perfectly.