How to measure the time of evolution of a signal in a graph and to compare this time measured with a known value?

For my application, I am obliged to measure the time of evolution of a signal acquired (from T1 to t2) by an analogical entry of a module NI 9203, and to compare this value with a value known in order to judge if this time of evolution is correct or not.
PLEASE I prefer an example for better understanding.

Greetings Jacob,
I am not sure what you mean with 'time of evolution' but normally you acquire at a certain acquisition rate. How much time that has passed, you can calculate by checking how much points are between your two points of interest.
If you are acquiring at 5Hz, the time between every point is 200ms. If there are let's say 10points between your two points of interest, 2s have passed.
Regards,
Wouter
National Instruments

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How to measure the time of evolution of a signal in a graph and to compare this time measured with a known value?

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