Write to Measurement file every (ten) seconds

[ddrop]

Hello everyone, If you view the attached VI, you can see I'm running my mean to a .tdm file. This is fine, but I want it to document the mean every ten or so seconds, instead of every .25 sec as it's currently recording. Any suggestions? As a side note... is there some way to stop the .tdm file from having all that extra stuff (group, channels, description, wf_*, etc)??

[NIquist]

No attachment to view!

No, you can't pare down the TDMS format, that would corrupt it into something that wasn't TDMS anymore.  You could use some other storage method that just saves what you want though.  (e.g. CSV, Excel, HTML)

[ddrop]

Sorry about that... don't know what happened to it. In case it doesn't work again, I've included an image below.

Thanks for the help so far, but the real problem is the timing, not the format. I need to write the mean to the measurement file every ten seconds as opposed to every .25 seconds.

[NIquist]

Well I don't use the DAQ Assistant, DDTs or Express VIs so I don't know how those are set up but if your DAQ is collecting a single sample all you have to do is change the 100mSec wait to a 10000mSec (10 Second) wait.  That should do it.

[ddrop]

Thanks... but I was wondering if it was possible to keep the sampling at its current rate (for the graph) and just change the Write to Measurement to every 10 secs. I guess I could make an entire new DAQ assistant to filter to mean to Write to Measurement sequence above it, but I was wondering if there was a more elegant solution for future reference.

[Dennis_Knutson]

Elapsed Time function as mentioned here.

[ddrop]

Thanks Dennis -- I'm unclear on some of your instructions in that article though. Could you provide a visual if you have time?

[aeastet]

Do you have to have a tdm file?

[ddrop]

No, but I need some sort of log of the mean.

[aeastet]

Something like this would work as an example