wavlength usb4000

[AKCanada]

Hi,

I have a usb4000 oceanoptics spectrometer and would like to extract a spectrum of intensity vs wavelength. However upon outputting the spectrum data to a text file I do not see a wavelength or x axis column with the values as I would see in the usb4000 default software which gives me a text file with the x axis ( wavelength) values in one column and the light intensity (y axis) in a second column.

Anyone know why this may be?

P.S- If I am being unhelpfully vague and/or you need more details please let me know!

Thanks!

[AKCanada]

Hi 

Never mind problem solved! Maybe I deserve a Kudos 😉

[Rrey]

Hi, 

I'm using Waveform Chart and I have Time (x-axis) and Amplitude (y-axis). Do you know how to convert my x-axis to Wavelength and y-axis to Absorbance/Intensity/Concentration? If you have a link please send me one.

Thanks 

=_)

[camerond]

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@AKCanada wrote:

Hi 

Never mind problem solved! Maybe I deserve a Kudos 😉

---

Not until you document your answer here in the Forums.

Cameron

[AKCanada]

Hey, I would need a little more information. Do you think you could post a screen shot of your program please?

[Rrey]

Are you able to see the attached screen shot?

The axis on "Waveform Chart 2" I have currently are Time (x-axis) and Amplitude (y-axis)

Are you able to convert those axis into wavelength and absorbance/intensity/concentration?

If you can send me a link, that would be very helpful

Thanks

=_)

Edit: Also, are you able to reset the x-axis for each run, as you can see my Time axis starts at 5690779. I would like it to reset back to 0. 

[Rrey]

If my previous queston was a little hard. Perhaps someone could help me explain how to convert from "Spectrum by Pixels" to "Wavelength"? 

I have a guess it has something to do with 2*pi, frequency and period?

[AKCanada]

Hi,

Thanks for attaching that screenshot! There is another labview vi called read spectral waveform. It is included in the downloadable labview instrument driver. If you output to a graph from there you should get intensity by wavelength. If you have any questions please let me know!

[Rrey]

I will try that now, the last time I tried it gave me some sort of error.

I'll try and get it working

Thanks,

=_)

[Rrey]

Thank you, it works perfectly 😃 

Now I can work peacefully 

Thanks a lot !

=_)