how to get a time averaged data from DAQ 6009

[perumpadapu]

I'am a research scholar . I'am doing a work which needs a constant voltage reading  from the DAQ 6009 card. Now whatever its giving is highly (for my work) fluctuating. So I need a averaged data from it for a interval of 100ms or something. Can I do it through daq assistant VI or outside I have to do or is there any way to solv ethis problem please reply.

[GerdW]

Hi perumpadapu,

I usually stay away from ExpressVIs, so I would suggest this:

Set a channel to read continuously with a sample rate of 1kHz, read 100 samples per DAQmxRead (resulting in a read operation each 100ms) and calc the average of those values...

[perumpadapu]

can you send a sample working program from screen shot I'am not able to make out what to do.I expect help

[GerdW]

Hi perumpadapu,

this is a snippet!

And it's very basic, using only functions from the top-level DAQmx palette...

[perumpadapu]

After DAQ assistant we have to make this program, Please reply

[GerdW]

Hi perumpadapu,

if you really want to stick with your DAQ assistent you should set sample rate and number of read samples the same way I did and put in the average calculation as I did.

I do not recommend using ExpressVIs...

[perumpadapu]

No other options other than this, because i need to average the sum of four signals from DAQ to 100ms, is it possible with this program. I had adjusted the sample rate and the frequency, but then also averaging is not happening. So please help me in this regard

[GerdW]

Hi perumpadapu,

don't you think it will help when you attach your VI?

Do you really need to sum up 4 signals before averaging? Does it make sense to do so?

[perumpadapu]

I'am sending the program which I wrote for aquisition, so please help me

[GerdW · Accepted solution]

Hi perumpadapu,

yo did set sample rate and blocksize to get 100ms blocks of data? Really?

Then why are both set to "1k"? That way you will get data each second...

Then I told you to use the Mean function to calc averages. Did you even tried that?