Vibration and Machine Monitoring

Classifying machine trains as critical, essential or general purpose to decide what level of vibration monitoring each needs. STI field application note.

Frequency domain vibration analysis: FFT spectrum displays, band analysis and choosing spectral resolution. STI field application note.

Field wiring for permanently installed vibration monitoring systems: low level signals, noise sources, AC power, instrument wire gauge, junction boxes, conduit spacing and single point grounding. STI field application...

Field service levels for vibration monitoring system installation: pre-installation survey, installation assistance, startup and calibration, turnkey projects and training, plus a project checklist. STI field applicat...

How the two methods of vibration transducer fault detection work, Fault Detection Circuits and OK Circuits, and the advantages and disadvantages of each. STI field application note.

Shaft eccentricity (rotor bow) measurement on large steam turbines: why it matters at slow roll, where to mount the eddy probe, midspan calculation, target, cabling, calibration and gap. STI field application note.

Differential expansion and rotor expansion measurement on large steam turbines: collar and ramp targets, retrofitting with eddy probes, single and complimentary systems, calibration and gapping. STI field application ...

Permanent vibration monitoring of cooling tower fan gearboxes and motors: frequencies of interest, recommended sensors and monitors, start-up and DCS/PLC considerations. STI field application note.

Standard vibration transducer conventions: motion towards the transducer, bearing numbering from the driver end, and X & Y sensor orientation. STI field application note.

Theory of operation, target material, runout, cabling, grounding, calibration, gapping and internal vs. external mounting for eddy current proximity probes.

Journal bearing design, hydrodynamic oil wedge, oil whirl and whip, common geometries (plain, lemon bore, pressure dam, tilting pad) and vibration monitoring.

What a rotating machinery predictive maintenance program involves, its benefits, survey and implementation steps, plus a PM program justification worksheet. STI field application note.

Why readings from different vibration instruments disagree: transducer type, bearing type, measurement type, engineering units, frequency response, mounting and location, plus conversion formulas. STI field applicatio...

How to build the machine list for a predictive maintenance data collector program: classifying machines as critical, essential or general purpose, choosing measurement points and parameters. STI field application note.

Journal bearing failure modes diagnosed with orbit analysis: balance, cracked shaft, loose rotating parts, oil whirl, oil whip, excessive preload and rub. STI field application note.