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Spectrum Viewer

NI InsightCM™ 3.1 Help

Edition Date: July 2017

Part Number: 374498D-01

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Parent topic: Available Viewers

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

Spectrum viewers display the frequency-domain representation of a measurement from a specific acquisition. 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. Click the Layout button in the viewer toolbar and select Open in new window. You can then set the cursor at another point along the trend curve to load the spectrum measurement at that time and compare it with the spectrum measurement you opened in a new window.

Related link: Comparing Measurements from Different Sources or Times
Change the x-axis frequency units to Hz, CPM, or orders. Click the Unit button and select the units you want.
Move the cursor to the nearest peak. Click the Find Peak button on the viewer toolbar to snap the cursor to the nearest peak.
Scale data according to RMS, peak, or peak-to-peak values. Expand the navigation menu and select Options. In the resulting dialog box, click Units and Scaling under the Data Viewer section, and then configure the Spectrum Scaling section. This setting scales the data itself.
Determine if a peak in the Spectrum is synchronous to running speed. Display harmonic cursors in a spectrum viewer to see if a peak in a spectrum occurs at a multiple of the 1x running speed. To enable harmonic cursors, click the Cursor menu on the viewer toolbar and select Harmonic.

Related link: Adding Harmonics and Sidebands to Viewers
Apply single or double integration or differentiation to data. Click the Integration button on the viewer toolbar and select an option from the resulting dialog box.

Related link: Integrating and Differentiating Data
Use logarithmic scaling for the y-axis. Click the Settings button on the viewer toolbar and select Viewer Settings. In the resulting dialog box, enable Logarithmic Y axis.
View multiple spectra in a waterfall graph. There is a separate waterfall viewer that allows you to display multiple spectra from a particular sensor. Insert a waterfall viewer into a new or existing workspace area to access this feature.
View the full spectrum data of a spectrum. While the spectrum viewer displays the half spectrum, there is a separate full spectrum viewer that displays the full spectrum of an orbit. Insert a full-spectrum viewer into a new or existing workspace area to access this feature.
See a table of trend values for features of selected assets. Click the Show Features button 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 the Choose Assets button on the viewer toolbar.

Related Information

Waterfall Viewer

Full Spectrum Viewer

Adding, Changing, and Removing Viewers


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