Auto-Correlated Spectrum Viewer

NI InsightCM™ 3.3 Help

Edition Date: December 2018

Part Number: 374498G-01

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Parent Topic: Available Viewers

Supported Sensors: Vibration sensors that acquire waveform data, such as acceleration.

Auto-Correlated Spectrum viewers display the measure of how similar a spectrum signal is to itself with a time lag. This is useful for finding repeating patterns in the signal. Move the cursor along a trend curve to update this viewer with the spectrum measurement at different times.

What do you want to do?

Task Action
Compare measurements from different sources or times. Create a data event reference.

Related link: Comparing Measurements from Different Sources or Times
Change the x-axis frequency units to Hz, CPM, or orders. Click Unit and select the units you want.
Move the cursor to the nearest peak. Click Find Peak on the viewer toolbar to move the cursor to the nearest peak.
Note  The peak may not be a point represented on the graph because it may fall between two recorded points.
Disable auto-scaling to manually set the scale for the viewer. Click Set Scale on the viewer toolbar. Uncheck Auto-scale and set the maximum and minimum values you want the viewer to use.
Determine if a peak in the spectrum is synchronous with the running speed of the equipment. Click Cursor on the viewer toolbar and select Harmonic.

Related link: Adding Harmonics and Sidebands to Viewers
Use logarithmic scaling for the y-axis. Click Set Scale on the viewer toolbar. In the Set Scale dialog box, enable Logarithmic Y axis.
View multiple spectra in a waterfall graph. Use the Waterfall viewer to display multiple spectra from a sensor. You can insert a Waterfall viewer into a new or existing workspace area.

Related link: Waterfall Viewer
View the full spectrum data of a spectrum. Use the Full Spectrum viewer that displays the full spectrum of an orbit. You can insert a Full-Spectrum viewer into a new or existing workspace area.

Related link: Full Spectrum Viewer
See a table of trend values for features of selected assets. Click Show Features on the viewer toolbar.
Select the source sensor. If you have more than one feature selected in the asset tree, you can select the source sensor for the viewer by clicking Choose Assets on the viewer toolbar.
Display fault frequencies. Click the Settings menu and select Fault Frequencies. In the resulting dialog box, select the fault frequency you want to display.

Related Information

Adding, Changing, and Removing Viewers

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