How to determine percentage variation in flow rate during various time periods

Hi,
Am in medical electronics division.
I want to simulate infusion pump.
How to do it.

You are confusing me.
In the title you are trying to determine the variations in flow rate, but in the message body you want to simulate an infusion pump.
Can you add a few more sentences to explain what you are trying to do.
Controlling a pump is very different to measuring exact flow rates.
LabVIEW Champion . Do more with less code and in less time .

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You'll have to figure out what flow rates correspond to what voltages. Then create a subVI that will map the desired flowrate to a voltage. It may be a simple scaling function, it may be a lookup table.
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One question though, does the behavior change over time? Does changing viscosity or temperature cause different voltage to flow rate behaviors? If so, your problem will get more complicated.

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Problems Reading gas meter flow rate ni 9402 counter

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Can any one help with this?
I have been trying to overcome the problem of the delay were a value is retained at the output of the counter for a period after the gas meter has stopped. This is causing me a problem as I am feeding this value into an integrator to get a measurement of energy used.(in the system I have other inputs such as gas pressure, barometric pressure and temperature)
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How to determine percentage variation in flow rate during various time periods

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