Vibration Alarm Setpoints
Vibration Alarm Setpoints
(OP)
I am looking for some guidance for determining alarm setpoints. I am aware that ASME section XI has some guidance, but in my experience this is wholly inadequate to maintain a quality Predictive Program. I am also aware that much of the alarm status is based on historical component performance and baselining, but I would like some kind of standardized reference.





RE: Vibration Alarm Setpoints
If you are purchasing a new motor, the following limits would apply to a test rigidly mounted (NEMA MG-1).
< 1 mil (most limiting for frequencies < 1200cpm)
< 0.12ips (most limiting for frequencies 1200-24,000cpm)
< 0.18 g's. (most limiting for frequencies >24,000)
Which one is most limiting depends upon what frequency range the energy is in.
I think that those are pretty tight limits to apply to all in-service machines. I know you already know it but.... look at historical performance AND performance of sister machines.
RE: Vibration Alarm Setpoints
RE: Vibration Alarm Setpoints