Recently i bought the following parts to measure strain from a wheatstone bridge.
1. cDAQ-9171, CompactDAQ Chassis (1 slot USB)
2. NI 9237 w/ DSUB, 4 Ch , 50 ks/s per Ch, Analog Input module
3. Ni 9923 Front-mount terminal block for 37 pin D sub Modules
For a startup , i wanted to check if i can measure DC voltage with the following modules. I called NI support and asked them if i can measure voltage with my current configuration. They said yes. So i went to NIDAQ max and chose create a task option. Then Measure Input Signals> Voltage. But i could not see any of the channel listed and it was saying device not supported.
So i switched to another option Measure Input Signals> Strain Measurement. There my four channels were listed. Since from wheatstone bridge we would be measure voltage for the difference in strain. So i wanted to check DC voltage through my voltage supply with this option. But when i try to do measure voltage . I could see a lot of noise especially 60 hz noise i guess. Can anyone suggest me what i can do to filter my 60 hz noise so as to get my signal ? Also whether what i am doing (measuring voltage from Voltage Suppy is possible with my current configuration ) ?
Any suggestions or help will be highly appreciated.
I have uploaded my graph as well as vi . The voltage i was measuring was currently 19.8 mv.
Thank you so much.
Thank you for your response.
Well i used the fft to check the frequency of the noise. But while doing fft i came across this problem. Well i am getting frequency response only in imaginary plot. But in real plot its just one peak. Can you tell me whether i am in the right track or wrong?
I have attached my vi herewith this , Could you please help me by checking by subvi? Thanks alot.
Also in this subvi what i am trying to do is store data in excel file.