Question about different vibration analyzers
Question about different vibration analyzers
(OP)
So this is a very basic question for someone who knows very little about vibration analysis. I work at a utility and we are looking at a few different consultants to conduct a vibration analysis on our two GE Frame 5 combustion turbines.
One consultant plans to use a CSI 2120 and another consultant has a Bently Nevada system. It is my understanding that these are two very different systems, but what I don't understand is if there is any signifcant difference in the quality of the results we are going to get?
Basically, is there something the Bently analyzer can tell me that the CSI 2120 can't?
One consultant plans to use a CSI 2120 and another consultant has a Bently Nevada system. It is my understanding that these are two very different systems, but what I don't understand is if there is any signifcant difference in the quality of the results we are going to get?
Basically, is there something the Bently analyzer can tell me that the CSI 2120 can't?





RE: Question about different vibration analyzers
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RE: Question about different vibration analyzers
RE: Question about different vibration analyzers
You probably need to define whinch BN anlayser he's using, FWIW I see more CSI gear around than BN.
Cheers
Greg Locock
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RE: Question about different vibration analyzers
Thanks for the help both of you.
RE: Question about different vibration analyzers
The one big difference between the two is that the Bently setup will be able to aquire data for many different points simultaneously, which is helpful for when you do a waterfall plot over decreasing or increasing speed range, which probably isn't the case, since your machine probably operates at a single speed.
So, it depends on what you're really looking for.
If you just want to start trending the condition of the unit over time, the CSI system will be good. If you think you have a bearing issue and just want to verify that vibration levels are high, the CSI will work.
But more importantly than the aquisistion system is the ability to interpret the data. I would suggest that for your analysis consultant, that you use someone that is familiar with turbine engines, unless you already someone who know to look for. Because anyone can stick a transducer on anything and tell you what the vibration levels are, but can't differentiate between synchrons speed vibration, vane pass frequency, gear mesh noise, or oil-whirl, etc...
I can probably suggest a couple for you to contact.
RE: Question about different vibration analyzers
http://www.machinerywatch.com
RE: Question about different vibration analyzers
Walt
RE: Question about different vibration analyzers