NI OSI and the scaling equation? which equation

[Aneece]

Hi everone,

I need to know what is the scaling equation that need to put in NI OSI explorer in order to get a correct reading from the FBG sensor?

Thanks

[RavensFan]

You'll have to explain somethings without using TLA's (three letter acronyms).

What is OSI explorer?

What is an FBG sensor?

[Aneece]

Hi Ravens,

Thanks for reply, NI OSI is a driver for NI PXIe-4844, it stands for Optical Sensors Interrogator for Fiber Bragg Grating.

in NI OSI there is a scaling formula to write to convert  the wavelength reading to an engineering unit such as microstrain etc..

I need to know what is difference between nominal wavelength and nulled wavelength.

your help appreciated.

Aneece

[Chris-Aither]

What measurement are you trying to make, temperature, strain or something else?  It has been a few months since I have used the OSI explorer, but I beleive the the nulled wavelength allows you to set an initial wavelength value for the FBG - thus allowing measurements to be taken from this value.  Nominal wavelength is just the wavelength value as is.  If all you want is wavelength then the equation should be 1*x. 

[Aneece]

Thanks Chris,

Yes I want to measure strain & temperature , I got the equasion thanks a lot.

Aneece