was the vibration data taken with the motor connected to the compressor? if so, at what loading/RLA?
Originally Posted by Taicool
the best open rotor test using vibration equipment is by measuring the dB of the current...see attached.
the main peak in the middle is the line frequency (60 Hz) and the large peak to the left is the rotor turning speed (57.469 Hz). the difference is about 32 dB. anything less than 45 dB indicates the beginning of a problem...<30 dB means that the motor is going to try to walk out of the door!
Don't step on my favorite part of the Constitution just to point out your favorite part.
Political Correctness is forced on you because you have forgotten decency.