CZ800: Analysis views and chart controls

Open the analysis workspace, select the equipment and point, open a measured historical record, check the time and record parameters, then choose an analysis view. Adjust channels, units, zoom and cursors, interpret the result with the operating condition, and export as needed.

For a blank chart, first check whether the record loaded and whether it contains the inputs required by that analysis.

The More Analysis menu can show or hide views, with at least one view kept visible. The AI Assistant entry on Home replaced an older trend card, but trend analysis remains in the analysis workspace.

A waveform shows vibration over time. Use it to examine impacts, repeating periods, amplitude changes and differences between channels. The time axis and waveform cursors use milliseconds.

Available controls include overlaid or separate-panel display, zoom, pan, dual cursors, peak markers, full screen and reset. Dual cursors read the time difference, amplitude difference and reciprocal frequency corresponding to the time difference. Place cursors on meaningful signal features; the reciprocal of an arbitrary interval is not automatically machine speed.

The waveform data table previews only the first 200 samples. Export the raw waveform to inspect all stored samples.

Statistics for CH1 and CH2 include peak, peak-to-peak, RMS, kurtosis, skewness, crest factor, impulse factor and clearance factor. Peak describes the largest absolute amplitude, peak-to-peak the span between maximum and minimum, and RMS the overall effective level. The other indicators describe shape, impulsiveness and asymmetry.

Amplitude entries in the recorded statistics table are labeled in g. Switching a chart to mm/s or micrometers does not convert the existing g statistics into velocity or displacement statistics. A missing-value dash means unavailable, not zero.

Compare indicators using the same point, parameters, sensor installation and comparable operating conditions. An individual indicator does not establish a particular fault on its own.

A spectrum shows where vibration components occur in frequency. Compare dominant peaks, harmonics and sidebands after checking the spectrum type and vertical-axis unit. Use frequency-band zoom, peak finding and the peak table. Ordinary-spectrum harmonic and sideband cursors require valid rotational frequency; the related controls may be unavailable without valid speed.

The combined Waveform and Spectrum view shows time-domain and frequency-domain data from the same record. It helps relate impacts over time to frequency components. Both charts still represent one record and do not replace a measurement under another operating condition.

The g, mm/s and micrometer display options for ordinary waveforms and spectra involve actual conversion. Velocity and displacement conversion depend on usable frequency band, low-frequency handling and sample conditions. Observe any truncation or frequency-band messages. Changing units does not turn the data into a direct measurement from a displacement probe.

The envelope waveform shows how the processed signal envelope varies over time, helping reveal repeated changes in impact amplitude. The envelope spectrum shows the envelope's frequency components. Bearing diagnosis uses it together with bearing characteristic frequencies.

1. Select a complete record.
2. Switch to Envelope Waveform or Envelope Spectrum.
3. Check the stored processing band and window function.
4. If changes are needed, use the diagnosis page's parameter area to recalculate and save.
5. Review the updated result.

The envelope and raw waveform have different meanings; do not combine their magnitudes as though they were the same indicator. Bearing characteristic-frequency markers can be displayed when matching results exist. Otherwise, choose a bearing model and run bearing diagnosis first. Merely displaying an envelope spectrum does not perform a bearing-fault assessment.

The cepstrum helps reveal repeating spacing within a spectrum. Its horizontal axis is quefrency displayed in milliseconds, and the vertical axis is relative squared amplitude. It is not a raw time waveform, and its horizontal axis must not be read as the Hz axis of an ordinary spectrum.

Select an analyzable record, open Cepstrum, and cross-check the result with the original spectrum, speed and site information.

Trends arrange historical indicators from the same measurement point over time to reveal gradual changes. Select the point, open the trend view and check the time range, record count and indicators. Show or hide indicators and, where the page allows it, set a warning line for display.

Each historical record contributes trend data; this is not a continuously sampled live curve. A temporary chart warning line is not an alarm threshold saved in the equipment record. Changes in operating condition, speed, sensor position or acquisition parameters can produce trend differences without machine deterioration.

The waterfall combines acceleration spectra from repeated captures at one point, using up to the latest 12 related records in the recorded implementation. It helps show whether frequency peaks change between acquisitions.

Switch between a frequency-versus-batch heatmap and stacked spectra, and adjust color scale or logarithmic amplitude. At least two spectra are needed for comparison. A vertical offset added to separate stacked traces is a display aid, not an increase in physical amplitude. When suitable history is absent, acquire complete records first.

The recorded Bode Plot entry is a scatter plot of CH1 1X amplitude against speed for up to the latest 200 valid historical records at one point. The 1X amplitude comes from the spectral line nearest rotational frequency; no interpolation for a non-bin-centered frequency is performed.

There is no phase curve supported by a traceable keyphasor. These independent historical captures are also not a continuous run-up or coast-down test and cannot establish critical speed.

Records need valid speed and a spectrum. Obtain the missing measurement conditions when necessary; do not invent speed values to populate the chart.

A measured shaft orbit normally requires synchronized X/Y displacement time series, probe orientation and keyphasor information. The recorded component provides a clearly labeled synthetic displacement example with an original orbit, 1X filtering, keyphasor markers and an export entry. It does not provide a measured orbit when actual records lack the necessary data.

CH1 and CH2 acceleration must not be treated as a measured shaft-displacement orbit. The example's major-axis angle and ellipticity must not be used for field diagnosis.

Use Reset to restore the full view after zooming. Use Full Screen for a larger chart; exit with its on-screen control or Escape.

Quick Export saves the current chart. Use the workspace Data Export dialog to select multiple charts, formats or data ranges. Check the current record and chart type before export so that a sample or another point's result is not included as the current measurement. See reports and data export for scope and format details.