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vibration analysis

Frequency Response, Range, and Resolution

Technology manufacturers print a lot of things on spec sheets. Some even push the integrity limits of writing specs, which has developed into its own slang term called ‘specmanship'. When

· ... refers to the range of frequencies which the equipment is capable of measuring, but without reference to the accuracy or "flatness" of the actual response across the range. For example, the frequency range from 10Hz to 20kHz with a tolerance of +/-10 dB is very poor quality in comparison to the tolerance of +/- 3dB from the previous example.

Asset Condition Management

Mastering time waveform analysis: Using time waveforms to assist the diagnostic process - Part One

A two-part, 1.5 hour recorded webinar playback on demand by Jason Tranter, Managing Director of the Mobius Institute

There are times when the vibration spectrum does not provide conclusive evidence of the exact nature and severity of the fault condition. Any fault conditions that involve impacts, rubs, beats, modulation, implosions and "non-linear" behavior are all most visible in the time waveform.

This presentation will introduce the concept of time waveform analysis, explain why the spectrum can hide information that is readily available in the waveform, provide examples where time waveforms reveal faults, describe how to determine the best data acquisition settings, and introduce circular plots.

1) How spectrum analysis alone may result in inaccurate diagnoses

2) How time waveform analysis can be used to improve the accuracy of your diagnoses

3) How to correctly measure and analyze time waveforms

PART ONE - Click here to view Part Two

Asset Condition Management

Practical Data Collection – Back to Basics II

A 60-minute web workshop presented by Mark Vowell, Customer Success Engineer Commtest, Inc,

Vibration programs are built on trust. We must rely on collected data to help direct our maintenance and engineering decisions. To rely heavily on such data it becomes imperative that the data be collected reliably, consistently and intelligently.

Watch this webinar to learn:

1) How to properly approach routine data collection

2) What to consider when choosing a vibration sensor

3) What to consider when collecting data off of an established route

Meggitt Sensing Systems Announces North American Debut of MEMS

Triaxial Inertial Measurement Unit with Integral Digital Compensation

San Juan Capistrano, California, USA - Meggitt Sensing Systems, a Meggitt group division, has announced the North American market debut of the Sensorex model SX43040, a rugged, high-performance MEMS triaxial inertial measurement unit (IMU) with integral digital hybrid compensation, designed to provide current rate of acceleration, gravitational force and degree of freedom (DOF) measurements, including changes in roll, pitch and yaw, across three orthogonal axes.

Asset Condition Management

Dynamic Balancing – “Did you really want to know this much!”

A one hour long Webinar On Demand by Ron Newman, PRUFTECHNIK, Canada

Unbalance has long been recognized as one of the leading causes of vibration in rotating machines. Under ideal conditions, field balancing is a correction method that is well understood and practiced, however under difficult conditions it can quickly become a major headache. Increasing our understanding of dynamic balancing, particularly in the area(s) of quality grades, recognizing the types of rotor unbalance, resonance vs. critical speed, rigid vs. flexible rotors, and the pre-balancing inspection, will go a long way in helping resolve that problem balancing job!

Learning Points:

1) A better comprehension of the ISO Balancing Quality Grades

2) An understanding of the importance of the pre-balancing inspection

3) Calculation(s) for effective Trial Weight selection

Asset Condition Management

Effective Defect Analysis: Maximizing your Vibration Setup

A one hour recorded webinar on demand by Mitch Stansloski, President of PIONEER ENGINEERING - LUDECA Inc Training Partner.

Missed vibration conditioning monitoring data can never be recovered. All too often either insufficient data is collected, or data is collected at an ineffective interval. Then when crucial trend information is needed, accurate analysis is difficult at best.

This presentation will discuss setting highly effective collection specifications, as well as determining the appropriate collection interval for several applications.

Watch this tutorial to learn:

1. How to set appropriate frequency ranges, averages, and resolution in order to avoid misdiagnosing malfunctions that could be very straightforward.

2. How to establish the appropriate collection interval which varies as a function of shaft turning speed, duty cycle, and load.

3. The new VIBXPERT II vibration analyzer and OMNITREND software will be used to present real case studies to demonstrate these concepts.

Asset Condition Management

Mastering phase: Using phase to assist the diagnostic process

A two-part, 1.5 hour recorded webinar playback on demand by Jason Tranter, Managing Director of the Mobius Institute

There are times when the vibration spectrum does not provide conclusive evidence of the exact nature and severity of the fault condition. Faults like unbalance, misalignment, bent shaft, cocked bearing, eccentricity, looseness and resonance can all be confused.

This presentation will introduce the concept of phase, explain how to measure phase, and then demonstrate how it can be used to distinguish one fault condition from another.

1) How spectrum analysis alone may result in inaccurate diagnoses

2) How phase analysis can be used to improve the accuracy of your diagnoses

3) How to use single channel and two channel analyzers and strobes to measure phase

Click Here to View Part Two

Fluke 810 Vibration Tester Helps Alpenrose Dairy Keep Milk Flowing

The 810 is part of Alpenrose’s proactive maintenance program to help understand when a motor or machine may encounter problems

PRLog - Alpenrose Dairy is able to maintain the efficiency of its processing operations by using the new Fluke 810 Vibration Tester to analyze the condition of its production machinery and troubleshoot any faults or potential problems.

Asset Condition Management

Fundamentals of Vibration – Back to Basics

A 50-minute web workshop presented by Rod Acklin, General Manager, Commtest, Inc,

Vibration Analysis can seem complicated and many programs can stall or stop completely. Getting the basics right can make a big difference between success and failure. Understanding what the technology can do and cannot do is vital when applying it to solve machinery problems.

Watch this webinar to learn:

1) What is a vibration signature?

2) What is a FFT?

3) What are amplitude units?

The Challenges of Safety

Permanently Mounted Sensors Key to Gathering Quality Vibration Data

by Tim Hunt and Tom LaRocque

Over the past several years, safety has experienced an increase in focus at manufacturing facilities. And sometimes, that increased emphasis on safety provides challenges to vibration measurement, many of which require creative solutions in order to obtain the valuable vibration data that ensures the maximum life out of our (now much safer) equipment and machines.

How is Machine Vibration Data Collected?

By Commtest Instruments

As machine surroundings are often hazardous and uncomfortable, vibration analysis is normally performed away from the machine. To do this, measurements are usually recorded with the instrument then transported to an office where the recorded data can be analyzed in a quiet and safe environment. In the office, the data can be transferred to a computer for more detailed analysis.

Asset Condition Management

What is Shock Pulse Method?

Shock Pulse Method is a signal processing technique used to measure metal impact and rolling noise such as those found in rolling element bearings and gears. Much more refined than other high frequency measurements, Shock Pulse is widely used throughout the world as a basis for predictive maintenance. Rolling element bearings are the most common measurement for Shock Pulse but the measurement technique has a number of other applications such as gear condition, compressor condition and other applications where metal-to-metal contact is a source of wear.

vibration analysis

Frequency Response, Range, and Resolution

Emerson delivers another wireless first with vibration spectrum for detailed machinery analysis

Mastering time waveform analysis: Using time waveforms to assist the diagnostic process - Part One

Practical Data Collection – Back to Basics II

Azima DLI Launches WATCHMAN Intensive Care Machine Condition Monitoring Services

Meggitt Sensing Systems Announces North American Debut of MEMS

Dynamic Balancing – “Did you really want to know this much!”

Demodulation

Identifying Electrical Vibration

Meggitt Sensing Systems Debuts Ultra-High Sensitivity Seismic Accelerometer

Effective Defect Analysis: Maximizing your Vibration Setup

Mastering phase: Using phase to assist the diagnostic process

Fluke 810 Vibration Tester Helps Alpenrose Dairy Keep Milk Flowing

Fundamentals of Vibration – Back to Basics

How Many Lines of Resolution?

The Challenges of Safety

Permanently Mounted Sensors Key to Gathering Quality Vibration Data

Getting to the Point with Vibration Collection Data

How is Vibration Described?

How is Machine Vibration Data Collected?

What is Shock Pulse Method?