Anybody had any success using true peak to monitor slow speed bearings eg 2- 10Hz running speed? Seems to me like this may be a good way to get an early indication of a defect and may be more trend friendly than ESP?

Gary

Very effective tool and possibly the only one. Please search the board for previous discussions on this subject. CSI has a lot of info on that as well.

David

I am talking about the true peak dervived from the peak to peak of the time waveform not PeakVue?

Gary

Hi Gary,
Yes it can help - the problem tends to be that it is easier to track this parameter if you are doing it as a static trend number rather than from the time signal because we all have the tendency to slow down the acquisition time to obtain a long time sample whereas the peak event is likely to be a very rapid transient event which would therefore not be seen.
It depends on your hardware really as to how you can achieve/optimise this.
I personally use ultrasound - it is much quicker and easier to manage.
Best Regards,
Tom Murphy
Tom@reliabilityteam.com

I have now tried it on my enwatch online system which has the capabilty to collect a true peak trend i.e. a sigle value magnitude reading. I have verified that it is actually true peak and not derived peak by comparing it to a time waveform and standard g's magnitude of the same bandwidth (the enpac 2500 can be loaded with a true peak spec but in actuallity only collects a dervied peaK!).

I was just wondering if anyone else has had much more success diagnosing slow speed bearing problems using TP?

regards

Gary