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Transient Analysis
Transient Analysis Transient analysis is the study of how various signals change during a machine's process or load change. This analysis is particularly important during a machine's
Turbine Supervisory Instrumentation
Turbine Supervisory Instrumentation Improve Reliability and Performance with a TSI from STI Vibration Monitoring STIís Turbine Supervisory Instrumentation (TSI) Systems provide cont
Dial Indicator Alignment
Dial Indicator Alignment Procedure The procedure for doing reverse dial indicator alignment is not a difficult one.  There are several steps which need to be taken for a s
Field Application Note: Reverse Dial Alignment
Courtesy of STI Vibration Monitoring Inc. Misalignment can be the most usual cause for unacceptable operation and high vibration levels. New facilities or new equipm
Acceleration Enveloping
Application Enveloping Acceleration envelope measurements are a new introduction to the inventory available to vibration analysts. Although initially it would seem to be most useful for detecting
Balancing Unbalance is a very common source of high vibration that is identified by excessive levels of vibration amplitudes at a frequency that is synchronous with machine speed. Possib
Bearing Failure Modes
Bearing Failure Modes This application note presents specific failure modes associated with machinery having journal bearings. Signal measurements presented here are time waveforms that
Classification of Machines
Classification of Machines This application note will provide a basis for selection of the machinery list of a Predictive Maintenance (PM) data collector program. Creating a PM mach
Comparing Vibration Readings
Comparing Vibration Readings Comparing vibration level readings taken by different types of instruments and transducers can be very confusing and can lead to mistrust of the systems involve
Differential / Rotor Expansion
Differential / Rotor Expansion Differential Expansion (DE) and/or Rotor Expansion (RE) are very important measurements usually supplied by the Original Equipment Manufacture (OEM) as part of a
Eccentricity Shaft Eccentricity plays a very important role as part of a Turbine Supervisory Instrumentation (TSI) System on large steam turbines and should be included in retro-fit p
Eddy Current (Proximity Probe) Transducer Installation: Part 1 Radial Vibration
Eddy Current (Proximity Probe) Transducer Installation: Part 1 Radial Vibration Eddy Current Transducers (Proximity Probes) are the vibration transducer of choice when installing vibrat
Field Wiring
Field Wiring There are a number of items to consider when installing a permanently mounted vibration monitoring system. One of the most critical considerations is the selection and insta
Frequency Domain
Frequency Domain Frequency domain measurements and analysis have become increasingly popular to diagnose a particular machine fault. This measurement mode relies on processing the
Journal Bearings
Journal Bearings Industrial machinery with high horsepower and high loads, such as steam turbines, centrifugal compressors, pumps and motors, utilize journal bearings as rotor supports.
Machine Classifications
Machine Classifications The type of vibration monitoring system to install on a machine train will depend upon how the machine train is used in the plant process. A very important machin
Monitoring System Users
Monitoring System Users Smooth operation of a machine train involves the cooperation of several disciplines which interface with each other and a vibration monitoring system in differing
Predictive Maintenance Program (PMP)
Predictive Maintenance Program (PMP) A Quality Rotating Machinery Predictive Maintenance (PM) Program for your facility will return your investment many times over. This type of PM
Reciprocating Compressors
Reciprocating Compressors Reciprocating Compressors are utilized in all manufacturing industries. Because these machines are capable of providing high pressure along with variable loading,
Reverse Dial Alignment
Reverse Dial Alignment Mis-alignment can be the most usual cause for unacceptable operation and high vibration levels. New facilities or new equipment installations are often plagued