But the time is determined by the digital balance and is not exactly 10 seconds. How can I determine the time elapsed since the point  to ?.
I tried to replace "10" for "Abs(weight.time - weight.time)", but don't work.
In my script the acquisition rate of the channel “weight” is determined by my scale (it's OK).
But the channel “dW” is calculated every second using 10 points. It is possible to calculate the channel “dW” using the 10 points, but storing only the "time" and "dW"of the tenth point?
In the picture show the example.