Is it this article I linked after this paragraph? I don't think I have seen this before, but I found it after searching "enveloped" on this forum. I think you posted it on a different thread. I also have one about Condition Monitoring of Slow Speed Assets. This one I put in the link below is a great explanation of what's going on in enveloped readings. I think it suggests using logarithmic view of the spectrum to diagnose severity on page 12. Is that something that you do? I have just been diagnosing the severity by seeing what defect type it is in the spectrum and then keeping that in mind when I look at the waveform's amplitude and patterning and then comparing it to previous readings (If I have them)
http://www.maintenance-engineering.eu/downloads/public/envelope%20bearing.pdfMarkL. Thanks for your help again, and if this link isn't what you're talking about I would be grateful to get a link to what you are talking about.
2Per, I will try using filter 4 and will check out the difference. Unfortunately, this motor is at the top of a giant silo, so I probably wont be up there again for another two months or so. I don't mind trying whatever you guys suggest once I get to the top, it's just the many flights of stairs and 3 hours of driving that it keeping me from doing it right now. Thank you for your suggestion and I will let you know how it works out