Harmonic Noise Index on Generators

[Rpsfinest]

I am looking for a device sensitive enough to measure the Harmonic noise index on a GE 7FA generator. We usually hire GE to come onsite to perform a test to determine if the core of the geneerator is loose which may require belly bands to prevent key bar rattle. Does anyone have any experience with this issue? I am looking for a procedure to monitor this HNI index to determine when our Unit should be taken offline to make repairs?

 

[ePOWEReng]

Vibrosystm has performs similar functions.....

http://www.vibrosystm.com/en/home_e.html