RMS o Peak to Peak Acceleration Enveloping Alarm?

Messrs. Forum:

Good evening, I will greatly appreciate a query regarding the attached SKF (Acceleration Enveloping (gE) Alarm), there is confusion about it, in vita that literature has been found where it says that the values of Enveloping Severity in this table are Global Values (RMS) of gE and there are other literatures where it says that these values of Enveloping Severity of the table correspond to values Peak to Peak of gE.

Please your technical support.

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Original Post

Very good question! I am not a big fan of the ˝table˝ envelope analysis (I don't use it) but I know this SKF enveloping alarm table and I know the confusion about it. Can you provide some source, where you have seen that the values in the table should be RMS values? As the table comes from SKF, I think you should accept the SKF literature only.

But here is one thing that bothers me. Per my experience the values in the table should be closer to RMS than P-P. That is why I never used it for reference.

There is one other tricky thing. Imagine you measure the same bearing with different equipment at the same time. RMS envelope value will not be the same at all equipment providers.   

jorgeluis-2000 posted:

Messrs. Forum:

Good evening, I will greatly appreciate a query regarding the attached SKF (Acceleration Enveloping (gE) Alarm), there is confusion about it, in vita that literature has been found where it says that the values of Enveloping Severity in this table are Global Values (RMS) of gE and there are other literatures where it says that these values of Enveloping Severity of the table correspond to values Peak to Peak of gE.

Please your technical support.

Hi

Can you attach the literature where the gE values are said to be in RMS.

SKF table is in pk-pk.

Thanks

Akhil

 

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