TECHNICAL LIBRARY
Application Notes
Each note explains one T8 measurement or analysis function: what it does, where it is used, how it works, which standards it refers to, how to operate it and how to read the result. The notes help you specify a configuration; confirm the functions and software package for your system in the quotation.
1 note
Shock and transient measurement
Evaluate measured shock pulses against standard pulses and tolerance bands.
6 notes
Spectrum and signal analysis
Recording, spectra, frequency refinement, unit conversion and filtering — the basic tools of dynamic signal analysis.
- T8-DSA-301Data Recording and ReplayRecord dynamic signals with three recording modes, then replay every frame offline for spectrum, color map, waterfall and audio review without conversion.Applies to: T8-3X
- T8-DSA-302Auto Power Spectrum (APS) AnalysisReal-time auto power spectrum with ten windows, five averaging modes, eight amplitude scales and velocity or displacement spectra integrated from acceleration.Applies to: T8-3X
- T8-DSA-303FFT Complex Spectrum AnalysisShow real, imaginary, magnitude and phase spectra together, with Bode, Nyquist and Nichols views, automatic peak marking and Excel export of complex data.Applies to: T8-3X
- T8-DSA-402ZoomFFT Frequency RefinementRaise the frequency resolution of any selected band several to dozens of times without resampling, and separate peaks only 1 Hz apart.Applies to: T8-3X
- T8-DSA-403Acceleration, Velocity and Displacement Conversion (AVD)Convert any acceleration, velocity or displacement input into all three quantities, with six synchronized waveform and spectrum views and automatic drift suppression.Applies to: T8-3X
- T8-DSA-404Zero-Phase Channel FilteringBand-pass, band-stop, low-pass and high-pass filtering of order 1–64 with zero time delay, and before-and-after waveforms and spectra on one screen.Applies to: T8-3X
3 notes
Environmental and human vibration
Weighted human vibration and noise, floor vibration criteria for precision facilities and random vibration assessment.
- T8-DSA-405Weighted 1/3-Octave Analysis for Sound and Human Vibration1/3-octave spectra with nine frequency weightings (A, C, hand-arm, whole-body, ACGIH) and 19 dB references, with weighted total RMS and level for limit checks.Applies to: T8-3X
- T8-DSA-409VC Vibration Criteria AssessmentCompare floor vibration with 19 criterion curves (ISO, VC-A to VC-M, NIST-A/A1) in 1/3-octave velocity bands and report class, compliance rate and minimum margin.Applies to: T8-3X
- T8-DSA-410Acceleration, Velocity and Displacement PSD AssessmentAcceleration, velocity and displacement PSD displays with total RMS, a 3σ estimate and source-reported preset comparisons whose numerical profiles require confirmation.Applies to: T8-3X
3 notes
Structural dynamics
Damping from decay waveforms, modal testing and time-frequency analysis of non-stationary signals.
- T8-DSA-406Single-Frequency Decay Waveform FittingFit a measured free-decay waveform to extract natural frequency, damping ratio, amplitude and phase, with Q factor, logarithmic decrement and more derived values.Applies to: T8-3X
- T8-DSA-407Modal Measurement and Parameter IdentificationImpact hammer modal testing with automatic hit scoring, live or imported FRFs, peak, LSCE and MDOF identification, CMIF, MAC and UFF exchange.Applies to: T8-3X
- T8-DSA-408Wavelet Time-Frequency AnalysisContinuous Morlet wavelet transform with time waveform, 3D waterfall and color map, for bearing impacts, gear modulation and run-up signals.Applies to: T8-3X
6 notes
Rotating machinery
Vibration severity, order tracking, automatic diagnosis, envelope analysis, shaft orbits and field balancing.
- T8-DSA-501ISO 10816-3 Vibration Severity EvaluationConvert acceleration to RMS velocity in the 10–1000 Hz band and classify machines into zones A to D for four machine groups on rigid or flexible supports.Applies to: T8-3X
- T8-DSA-502Variable-Speed Order TrackingAngle-domain resampling order tracking with tachometer or tachless speed extraction, run-up/run-down separation and 3D and color order maps.Applies to: T8-3X
- T8-DSA-503Automatic Machine Fault DiagnosisAutomatic speed detection, ISO 10816-3 zone, harmonic rules for unbalance, misalignment and looseness, and bearing and gear diagnosis with severity and confidence.Applies to: T8-3X
- T8-DSA-504Hilbert Envelope Demodulation for Bearing DiagnosisHilbert envelope analysis with four linked views, automatic BPFO, BPFI, BSF and FTF markers, harmonic families and automatic alarm threshold.Applies to: T8-3X
- T8-DSA-505Shaft Orbit AnalysisDraw the shaft orbit from two orthogonal proximity probes, extract peak-to-peak, 1×/2× and precession, and evaluate zones A to D with limit circles.Applies to: T8-3X
- T8-DSA-506Field Balancing: Single- and Two-PlaneIn-situ single- and two-plane balancing by the influence coefficient method, with tachometer phase reference, ISO 21940-11 grades and split-weight plans.Applies to: T8-3X
4 notes
Acoustics
Sound quality, sound power, sound insulation and noise limit assessment.
- T8-DSA-601Sound Pressure and Sound Quality AnalysisSound level statistics, octave spectra and Zwicker psychoacoustics — loudness, sharpness, roughness, fluctuation strength, articulation index — plus tonal detection on 8 channels.Applies to: T8-3X
- T8-DSA-602Sound Power MeasurementEnveloping-surface sound power to GB/T 3767 / GB/T 3768 (ISO 3744 / ISO 3746) with 8 synchronized microphones, band-by-band K1 and automatic K2 corrections.Applies to: T8-3X
- T8-DSA-603Sound Insulation: Level Difference and Rating DisplaysTwo-channel sound level difference and DnT displays, with source-described Rw, C, Ctr and STC outputs whose measurement and rating basis require confirmation.Applies to: T8-3X
- T8-DSA-604Noise Limit Assessment: A-Weighted Limits and NR CurvesCurrent-frame noise comparisons against source-reported A-weighted and NR criteria, with margins in dB; formal assessment requires the applicable method and measurement period.Applies to: T8-3X
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