VI to tare Waveform Data

[smoothdurban]

Hello,

I am trying to develop a VI that will allow me to take in a voltage signal from signal express and tare the signal then output the waveform signal.

I have created a VI that I thought should work.

Any help would be appriciated.

I am using SE 2011.

[Erik-S]

Hello Tim,

I would suggest using shift registers instead. Here is a link that describes how to use them:

http://www.ni.com/gettingstarted/labviewbasics/shiftregisters.htm#Initializing Shift Registers

-Erik S

[smoothdurban]

I have tried that and I do not get any waveform output.

Has anyone else got a VI to work where they take waveform as input, perform some operation and display the waveform output?

[Erik-S]

You can also try using the Waveform Scale and Offset function. If you take the Y component of the waveform and use it as an offset, you should be able to output a new "tared" waveform. The Y component would need to be negated, though, because the offset function adds the offset instead of subtracting. The unbundle function can be used to get the Y component of the waveform. The following links demonstrate the offset and component manipulation of the waveform bundle.

http://zone.ni.com/reference/en-XX/help/371361J-01/lvwave/waveform_scale_and_offset/

https://decibel.ni.com/content/docs/DOC-8481

https://decibel.ni.com/content/docs/DOC-26873

-Erik S

[smoothdurban]

I have no doubt these solutions work when runing the VI in labview but I am try to get this to work in Signal Express.

I have followed the steps illustrated here http://digital.ni.com/public.nsf/allkb/359D14941D6936E98625729D008387D5

but for what ever reason I cannot seem to get any out put from the attached project.

[Dennis_Knutson]

You've been using LabVIEW for a couple of years and should know that a lvproj does not contain any code. You need to attach actual VIs.

[smoothdurban]

My mistake I though I attached the correct file.