Dividing time waveform with its peak value

[AutomationUET]

Dear Sir/Madam

Good Day

I am collecting real time data from current sensor. I plot it on the graph. Now I need to divide that waveform with its peak to peak value and then need to draw it on graph. Can anyone guide me how to do it. My vi is attached.

Warmest Regards

Urfee

[GerdW]

Hi Urfee,

start with this:

[AutomationUET]

Dear Mr. GerdW

I cannot find waveform in and waveform out vi in function pallet. Also what is the name of vi to get max and min value.

Kind Regards

Urfee

[GerdW]

Hi urfee,

you spoke about waveforms in your question. So I opened the waveform functions palette to find suited functions. As you needed the peak amplitudes I took WaveformMinMax to get them. I just noticed there also is a WaveformNormalize function!

You create inputs/outputs of functions by right-clicking the function connector and selecting Create->… As this is pretty basic I like to advise you to go through those LabVIEW 101 courses offered online & free on NI.com!

[AutomationUET]

Dear Sir

I am much thankful to you for guidelines.

1. Can you please check my vi whether I have normalize correctly or its wrong.

Basically I have collected signal from two sensors, one is current and other is voltage sensor. I plot FFT of current signal and then I calculate instantaneous power and calculated FFT of instantaneous power. (Please also verify that my method to calculate instantaneous power is correct or not)

2. I have used low pass filter but still so much noise shown in FFT spectrum of both current and power. Why this happening? How we can eleminate noise. (I have to analyse the harmonics inside the current and power spectrum. The harmonic frequencies are less than 500 Hz range)

Kind Regards

Automata

[GerdW]

Hi UET,

could you please re-attach your VI downconverted to LV2011?

[Hooovahh]

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@GerdW wrote:

could you please re-attach your VI downconverted to LV2011?

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Thankfully the last VI was saved in 2012 not 2014.  If it were NI wouldn't be too happy.  In any case here it is in 2011.

[johnsold]

Note that there is an extensive discussion here apparently by the same person with a different username.

Lynn

[AutomationUET]

Dear Mr GerdW

I dont know how to convert from LabVIEW 2012  to 2011. I have 2012

Kind Regards

[GerdW]

Hi UET,

did you ever looked at the entries in the "File" menu?