how can i do rms data trending using labview

[hafizzuddin]

Hai guys,currently i'm doing a vi to minitor a vibrating motor. each experiment consist of few position and each position will have its own overall RMS value. before this, i just read and take the rms value to plot the trending graph using excel. the question is how can i store this RMS value and use it to show/create a graph to show the trending of the RMS vibration motion using LABVIEW. 

here i attached my block diagram ad an exmaple of trending which i did using excel. thank you

[shrekt]

Hi,

I think you forgot attach the VI.

but to my unserstanding i think you need following thing.

Regards.

Shrek

[hafizzuddin]

shrekt, i'm sorry i didnt attach eralier, here i attach my block diagram.

the 1 u gave if similar to what i intended to do, but when i try to modify my block diagram, i gave me error as i attach also the picture 'after modified' together. hope u got some tips on it. thankz

[shrekt]

Hi,

Actually the output of the you build is 1D array and the table is 2D array so the error is there.

convert that array into 2D, oe else attach the vi.

Regards,

Shrek

[hafizzuddin]

this is the the vi created, thank you

[nolsqn]

Hi

right click on build array and un check  concatenate inputs  option. see if its works then

[shrekt]

HI,

I have done it for you, check the following ex.

Regards

[hafizzuddin]

thank you. but can we save the data that we export? i see when i close the application, all data is exported gone

[shrekt]

Hi,

Where do you want to save the data, (on the control, text file, or any other ?)

[hafizzuddin]

*correction, all the data exported are gone and the time and date on grahph, how can we make it to present? i've change it but it still apear 1904 1st