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Training Requirements for evaluating vibration monitors

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YungPlantEng

Chemical
Jan 19, 2022
82
What level of training would be necessary to be able to effectively define requirements for a cost-effective route-based vibration analyzer?

I'm struggling to differentiate between all the different options for vibration analyzers. My manager believes a vibration pen or couple-thousand analyzer would be effective but my understanding is that for variable frequency or low RPM equipment these likely won't cut it. Also to attempt to delineate between defects or even just catch some defects low and high pass filters and the use of FFT, PSD, etc. seem necessary.

We're restarting our vibration analysis program and I'm trying to convince my boss that wireless transmitters or a $2000 route analyzer are useful if we want to confirm defects with any sort of reasonable hit rate.

While I know a little bit about vibration I would like to develop to the point where I can understand the benefits for various analyzers on the market and find a cost-effective but robust system. Which training courses and/or certifications would be necessary to get to this point?

Keep in mind our sites been burned by poor consultants in the past (not using lower frequency sensors where needed, extremely exorbitant costs, poor communication). Would not like to repeat this and want to bring this in-house to the fullest extent.
 
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Although technology is necessary, the most important part of your vibration analysis program is the people. They need the proper training and experience (hopefully with some mentorship mixed in) to be successful. Standard vibration training (in the US, there is Vibration Institute, Mobius Institute, Technical Associates of Charlotte, vendors, etc.) doesn't necessarily spend time talking about route-based analyzer specifics, but from class you should be picking up important information, like lines of resolution, frequency resolution, demodulation/envelope capability, etc.

Assuming that you are in the US, for training I would recommend using Vibration Institute or Mobius Institute, as they are both ISO certifications. The ISO certifications (which include experience requirements) are portable, recognizable, and easy to validate.

What kind of rotating machines do you have? Your post mentioned variable frequency and low speed equipment. I'd make sure that any potential vendors show you how they monitor those types of assets and you try out their hardware and software before you purchase.

Consider vising machineryanalysis.org as well. A lot of experienced folks in the vibration monitoring world.
 
"We're restarting our vibration analysis program"

Was it all subcontracted previously ? Or, did you own any instrumentation/analyzers etc ?
 
I've found cheap vibration tools simply don't detect vibration below about 400cpm.

I have customers who insist we install Murphy / earthquake switches on machinery with a primary shaft speed of 400rpm. Likewise with vibration sensors (iAlert for example) do great work generally but at 400cpm and under they're blind.
 
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