Mean PtByPt VI stops working

[Stefan_shs]

Hello,

currently I'm creating a VI for reading out a multimeter.

In this application I need in parallel a measurement about the last 3s and 30s while tool is continueing and for this I want to use the VI "Mean PtByPt".

Every 25ms I get a new value, so I have a sample length of 120 and 1200.

120 samples are ok, but 1200 seems to stop sporadically  and after a few seconds it keeps going on.

Do you have an idea for this issue?

Thanks

Stefan

[billko]

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@Stefan_shs wrote:

Hello,

currently I'm creating a VI for reading out a multimeter.

In this application I need in parallel a measurement about the last 3s and 30s while tool is continueing and for this I want to use the VI "Mean PtByPt".

Every 25ms I get a new value, so I have a sample length of 120 and 1200.

120 samples are ok, but 1200 seems to stop sporadically  and after a few seconds it keeps going on.

Do you have an idea for this issue?

Thanks

Stefan

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Sorry my post wasn't helpful.

[GerdW]

Hi Stefan,

the problem with images is: we cannot debug them using LabVIEW.

So I created a simple test VI:

As this one works as expected (i.e. nothing "stops suddenly") I guess the problem is in other stuff of your VI next to the PtByPt-Mean functions.

Recommendation: Debug your VI…

[Stefan_shs]

Hello Gerd,

thanks for answering so fast.

Now I added the VI 😉 - sorry

I will try your vi-test.

best regards

Stefan

[GerdW]

Hi Stefan,

I simplified your VI to run the test without any file handling:

No need to build up an ever-growing array just to calculate a min/max value.

Are you sure by adding current values you get the "average voltage"???

I also added a wait time to the loop…

Please run such a test to verify your observations!

[Stefan_shs]

Hi Gerd,

the simply test was successfully without any abnormalities except there seems to be a small difference between LV2013 and LV2018, but that is to neglect, I think.

At the moment I'm working with 2013.

And the theme with the average voltage:

The documentation is not so fine till now. I measure a voltage value from a current transducer, add all values and divide them by the index. And the factor to get the current is 60. 

And I will insert a wait time - so I get a defined time for the samples by the mean currents.

Thanks

Best regards 

Stefan