VCAT-III Senior Vibration Analyst

Learn to be an effective vibration leader and master analyst - capable of managing the condition monitoring program, diagnosing the widest range of fault conditions, verifying and correcting resonance problems, performing complex balancing machinery - with advanced 3D animations and interactive simulations that make everything easy to understand.

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If you are ready to be the senior vibration analyst, with the capability of handling all the common fault conditions and leading the Category I and II analysts, then this is the course for you.

The Category-III course is intended for people who are confident with spectrum analysis but who wish to push on and learn more about signal processing, time waveform and phase analysis, cross-channel testing, machine dynamics, and fault correction. If you wish to truly advance in vibration analysis and be able to run a successful condition monitoring team, then you are ready for this course.

  • You will learn to diagnose all of the common fault conditions with rolling element and sleeve bearing machines, utilizing spectra, high-frequency detection techniques, time waveforms, phase readings, and other techniques to diagnose faults.
  • You will also learn machine dynamics (natural frequencies, resonance, etc.), how to perform resonance testing, and how to correct resonance problems. The course also covers the single and cross-channel measurement capabilities of your analyzer.
  • And after completing the CAT-III course, you will be able to set up and run a successful vibration program and mentor the junior analysts.

Once you complete the training, you can take the exam with confidence, and become certified to ISO 18436-2 Category III via the internationally respected Mobius Institute Board of Certification [MIBoC]™. The MIBoC certification is accredited to ISO/IEC 17024 – there is no higher standard. You will join thousands of other Mobius™ certified analysts around the world.


Learn More about VCAT-III Training and Certification

  • Why learn with Mobius Institute™?

    There are three major reasons why over 4,000 vibration analysts choose Mobius Institute every year:

    1. We make complex topics simple with amazing 3D animations and simulations that make you say, “Ah, now I get it!”
    2. We give you access to the entire course before the class begins so you are better prepared, and for six months after the course, just in case you still have questions
    3. We use anonymous, stress-free polling throughout the course, so you know if you truly understand each topic, and the instructor knows not to move on to the next topic – no student is left behind

    There are many other reasons why vibration analysts, and their managers, choose Mobius Institute.

  • How can I take this course?

    We offer the ultimate flexibility:

    • PUBLIC: You can take the public, instructor-led course with other people like you. You can find a public course here.
    • VIRTUAL: You take the course from the comfort and safety of your computer, with an instructor guiding you through the course. You can find a virtual course here.
    • ON-SITE: You can invite the instructor to your site and save yourself the cost, hassle, and risk. You can find partners who can deliver the course here.
    • VIDEO: You can have the ultimate in safety and flexibility by watching a video of the course. You can watch it multiple times! You can place your order here.
  • VCAT-III Candidate profile
    This course is intended for the vibration analyst who will:
    • You have a minimum of three years of experience
    • Have a senior role in the condition monitoring team
    • Have others report to them to verify diagnoses
    • Be responsible for the most complex fault conditions (with the possible exception of sleeve bearing, flexible rotor machines)
    • Need to perform complex tests to validate fault conditions (e.g. resonance) and find a solution
    • You want to be a leader of the vibration team or take a leading role in diagnosing faults and making repair recommendations
    • You want to understand all data collector options, special test capabilities, all analysis tools and understand the widest range of fault conditions
    • You are seeking to become certified to international standards (ISO-18436) by an accredited certification body
    • You want to understand all condition monitoring technologies, how and when to apply them
    • You want to understand machine dynamics (natural frequencies, resonance, ODS), how to perform resonance testing and how to correct resonance problems
    • Use the training and certification as the next step in a rewarding career as a vibration analyst
  • VCAT-III fast facts


    • 38 hours, typically over 5 days


    • Live public course
    • On-site course
    • Virtual online course
    • Video distance learning online course


    • Training and certification: ISO 18436-2
    • Certification: ISO 18436-1, ISO/IEC 17024
    • Training: ISO 18436-3


    • Four-hours
    • 100 multiple-choice questions
    • 70% passing grade
    • Can be taken online or in-person at the course

    Certification requirements:

    • Training course completed
    • 36-months of vibration analysis experience, verified by an independent person
    • Pass the exam
    • Have previously been VCAT-II certified by an approved certification body
    • Valid for 5 years
    • There is one other way to become VCAT III certified and that is to invoke the mature candidate clause. If you meet the criteria, you can enter the VCAT training and certification program without being VCAT-II certified. *See below question for criteria:  Can I skip the CAT II course and jump directly to CAT III?


    • Access to the “Learning zone” upon registration and payment
    • Complete set of videos covering every topic
    • An excellent way to be prepared and get the most from the course


    • Continue to access the Learning zone for 4-months after the course
    • Continue learning, without charge, on Mobius CONNECT® via
  • Which topics are covered?
    There is a great deal to learn, but it will help you to perform your role with confidence. The topics covered in this course include:
    • Review of condition monitoring technologies and the ISO standards
    • Signal processing and data acquisition
    • Time waveform analysis
    • Phase analysis
    • Dynamics (natural frequencies and resonance)
    • Testing for natural frequencies
    • Operating Deflection Shape (ODS) analysis
    • Modal analysis and intro to FEA
    • Correcting resonances
    • Rolling element bearing fault detection
    • Journal bearing fault detection
    • Electric motor testing
    • Pumps, fans, and compressors
    • Gearbox fault detection
    • Corrective action
    • Running a successful condition monitoring program
    • Acceptance testing
    • Review of ISO standards

    The key is that on the VCAT-III course you will transition from being a vibration analyst who should be supervised, to a person who is capable of running the program, being a senior consultant, solving difficult problems, and taking a leadership role.

  • Why become certified by Mobius Institute Board of Certification?

    Vibration Analysis Category III (VCAT-III) Certification

    • You should be recognized for your achievements; not everyone is up to the challenge of understanding vibration analysis, let alone successfully collecting data and utilizing it
    • Being certified by an accredited certification organization is a major step up from simply passing a test. Yes, the process is a little more complicated and stricter, but that is for very good reasons
    • The educational process is extremely valuable, but being certified tells an employer (or a consulting client) that you are capable of doing an important job

    Mobius Institute has certified more vibration analysts than any other organization and we have only been offering certification since 2005. Almost 40,000 vibration analysts around the world, just like you, chose Mobius Institute for a good reason.

    You will receive a digitally encrypted certificate, an ID card, and a personalized logo that you should use in email signatures and elsewhere that you want people to know about your achievements.

  • VCAT-III training and certification requirements
    All you need is a desire to learn and to succeed in your field. In order to be certified you must:
    • Complete a MIBoC approved training course (click here for a list of approved courses).
    • Achieve 70% or higher on the certification exam (100 multiple choice questions, duration 4 hours).
    • Have thirty-six (36) months of practical vibration analysis work experience, verified by an independent person.
    • Have previously been certified to VCAT-II by a MIBoC approved certification body.

    Certification is valid for 5 years.

    If you do not have the experience, you will still receive a certificate, but you will not be officially certified. When you pass the 36-month milestone, please contact MIBoC to be upgraded to full certification.

    You can learn more about the certification process here or download our Vibration Analysis Certification Guide here.

    There is one other way to become VCAT III certified and that is to invoke the mature candidate clause. If you meet the following criteria, you can enter the VCAT training and certification program without being VCAT-II certified. *See below question for criteria:  Can I skip the CAT II course and jump directly to CAT III?

    You can learn more about the certification process here.

  • A detailed list of training course topics
    Here are the main topics covered on the VCAT-III course:
    • Signal processing
      • Filters: Low pass, band pass, high pass, band stop
      • Sampling, aliasing, dynamic range
      • Signal-to-noise ratio
      • Resolution, Fmax, data collection time
      • Averaging: linear, overlap, peak hold, time synchronous
      • Windowing and leakage
      • Order tracking
      • Cross-channel measurements
      • Correlation and coherence
    • Time waveform analysis
      • Collecting data – ensuring you have the correct setup
      • When should you use time waveform analysis?
      • Diagnosing unbalance, misalignment, bent shaft, eccentricity, cocked bearing, resonance, looseness, and other conditions
    • Phase analysis
      • Collecting data
      • Bubble diagrams
      • Diagnosing unbalance, misalignment, bent shaft, eccentricity, cocked bearing, resonance, looseness, and other conditions
    • Dynamics (natural frequencies and resonance)
      • Natural frequencies and resonances
      • Mass, stiffness, and damping
      • SDOF and MDOF
    • Testing for natural frequencies
      • Run-up coast down tests
      • Bode plots and Nyquist (polar) plots
      • Impact and bump tests
    • Operating Deflection Shape (ODS) analysis
      • Can we prove the existence of a natural frequency?
      • Visualizing vibration
      • Setting up the job
      • Collecting phase readings correctly
      • Interpreting the deflection shape
      • Using Motion Amplification
    • Modal analysis and intro to FEA
      • How does modal analysis differ from ODS?
      • How does Finite Element Analysis (FEA) differ from modal analysis
      • A quick review of the modal testing process
    • Correcting resonances
      • The effect of mass and stiffness
      • Beware of nodal points
      • Adding damping
      • A ‘trial and error’ approach
      • A ‘scientific’ approach
      • Isolation
      • Tuned absorbers and tuned mass dampers
    • Rolling element bearing fault detection
      • Why do bearings fail?
      • Cocked bearing, sliding on the shaft or inside the housing, looseness
      • EDM and DC motors and VFDs
      • Bearing frequencies and what to do when you don’t have all the details
      • The four stages of bearing degradation
      • Ultrasound
      • High-frequency detection techniques
      • Shock Pulse, Spike Energy, Peak Vue, and other techniques
      • Demodulation/enveloping
      • Selecting the correct filter settings
      • Spectrum analysis
      • Time waveform analysis
      • Low-speed bearings
    • Journal bearing fault detection
      • What are journal bearings?
      • Measuring displacement
      • Introduction to orbit plots
      • Using your analyzer to acquire orbit plots
      • Introduction to centerline diagrams
      • Eccentricity ratio
      • Glitch removal
      • How the orbit changes with pre-load, unbalance, misalignment, instabilities, oil whir and whip
    • Electric motor testing
      • How do motors work?
      • Diagnosing a range of fault conditions: eccentric rotor, eccentric stator, soft foot, phasing, broken rotor bars, rotor bar, and stator slot pass frequencies
      • Motor current analysis
    • Pumps, fans, and compressors
      • Unique fault conditions
      • Flow turbulence, recirculation, cavitation
    • Gearbox fault detection
      • Spectrum analysis versus time waveform analysis
      • Wear particle analysis
      • Gearmesh, gear assembly phase frequency (and common factors)
      • Tooth load, broken teeth, gear eccentricity and misalignment, backlash and more
    • Corrective action
      • General maintenance repair activities
      • Review of the balancing process and ISO balance grades
      • Review of shaft alignment procedures
    • Running a successful condition monitoring program
      • Defining the program
      • Setting baselines
      • Setting alarms: band, envelope/mask, statistical
      • Setting goals and expectations (avoiding common problems)
      • Report generation
      • Reporting success stories
    • Acceptance testing
    • Review of ISO standards

Frequently Asked Questions

Some of the more common questions regarding our VCAT-III Senior Analyst course


    If you have five years of experience, and you have previously received training that covers the Category I and II syllabus, then you may go directly to Category III. This is called the “Mature candidate” clause.  You will be asked to verify your experience and provide evidence of your prior training, but it will save you from re-taking the Category II training and certification exam.


    Upon course registration all students will receive an instructional email with a link to the TMS (Training Management System) to finalize their course registration and student profile.  Once registration is complete you will see a link to the applicable online Learning Zone under the training course tab in your student profile.  (Category IV training does not include the online Learning Zone). The Learning Zone provides a digital version of the coursebook and also a series of folders containing movies. These movies are actual course videos, recorded in a studio, and contain similar content taught in the Instructor-led course.


    Every registered student will receive an instructional email to finalize their course registration. They will also receive a link to the TMS (Training Management System) where upon accessing they select the training course where they are able to access their personal Learning Zone. The account provides a digital version of the coursebook and also a series of folders containing movies. These movies are actual course videos, recorded in a studio, and contain the same content taught in the Instructor-led course the student is registered in. The Learning Zone Account may be used for pre-course study materials, review during the course week, reference after the course, or used to re-take the course and re-sit your certification exam. The account is activated at the time the student registers for the course and expires 4 months after the close date of the course they will be attending.


    Yes, learn forever with Mobius Institute “Life Long Learning”. Receive access to video trainings for a lifetime as a past, present, and future Mobius Institute student. As a student you can continue to access the training videos.  Regardless of whether you attend a public course or an onsite course or purchased an online distance learning. For a nominal cost of the equivalent distance learning course fee, past, present, and future Mobius Institute vibration students can continue to access the training videos forever. To upgrade either select the option – Life Long Learning Upgrade using this link – Life Long Learning Upgrade Link or contact your training partner directly.


    No, but we do offer Category I-III Distance Learning (DL) courses which are the online equivalent to our Public courses. The cost is the same as attending a Public course, the training material content is fully ISO 18436 compliant and you will be qualified to take the Certification Exam once you have completed the DL course.

    You will find the distance learning courses on our shopping cart.


    Yes, we offer a range of courses that can be conducted onsite, including our Category I-IV vibration analysis courses, Asset Reliability Practitioner® ARP, ultrasound, balancing, alignment, and others. If you are in North America, please email the course category and number of students to for a quotation. Outside North America, contact your local training partner.


    Yes, our courses are open to the public, regardless of experience. If you are involved in vibration analysis or rotating machinery in any capacity, such as sales, marketing, engineering, design, or reliability, you will come away with a far better understanding of how machines are monitored, how faults develop, and what can be done to determine what faults actually exist in a machine. All attendees receive certificates of completion. Candidates without sufficient experience will still receive a certificate if they pass the exam, but it will note that their experience was insufficient for ISO certification at the time.


    You will receive notification of your results 5-10 days after the exam has been received at our Australian office. If you have passed the exam and met all certification requirements, you will receive your Digital Certificate 10-15 days after your exam results notification email.


    Vibration analysis certification is valid for five (5) years.


    We will endeavor to contact you before your certification expires, therefore it is important that you keep your TMS records up to date (TMS is the training management system you will use to register for the course and for certification). If you change roles, it is essential that you update your records. We also invite you to set a reminder in your calendar for five years hence to contact us.


    As per the standard, we do not require you to attend our conferences or take our courses, however, we hope you will take advantage of and the sites linked to Mobius CONNECT so that your knowledge remains current. These sites are free of charge. When it is time to renew your certification, we will ask you to nominate an independent person who can verify that you are still active as a vibration analyst. There will be a small fee to renew your digital certificate and to renew your certification status with the accreditation body.


    You must have 36 months of experience in vibration data collection and analysis. You will be asked to nominate an independent person who can verify that you have that experience.
    Certification to VCAT III also requires previous certification to VCAT II by a MIBoC approved certification body.

VCAT-III Vibration Analyst

Something about the learning doesn’t stop with VCAT-III, but just begins… see our other VCAT courses….

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