Add a timestamp to serial data capture

[PanDiStelle]

Hi!

I have a balance that I am reading through RS232 using VISA. The balance output frequency depends a lot on the dynamics of the load applied to it (so high f when the load is changing, and low f when it is stable). I would like to add a timestamp (ideally relative to the point when I click "start") to the data everytime it is captured, but I am not sure how to do it exactly. Any ideas and suggestions are welcome!

Thanks a lot in advance!

Dani

[GerdW]

Hi PanDiStelle,

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@PanDiStelle wrote:

 I would like to add a timestamp (ideally relative to the point when I click "start") to the data everytime it is captured, but I am not sure how to do it exactly. Any ideas and suggestions are welcome!

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You need to calculate the relative time in your acquisition loop:

relative_time := current_time - time_at_start_of_loop

Basically just a subtract function: I guess you know how to implement this…

Then you need to "combine" that relative time value with your gauge reading: most often such data is collected in (2D) arrays…

What have you tried and where are you stuck?

Why don't you attach your current code (aka VI)?