MCSA 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: Virtual motor sensors and motor current sensors.

MCSA Spectrum viewers display a high-resolution spectrum of the motor current magnitude for motor analysis. The spectrum resolution of the MCSA Spectrum viewer is higher than that of the Spectrum viewer. Move the cursor along a trend curve to update this viewer to display the measurement at different times.

Note  
  • The MCSA Spectrum viewer displays only one spectrum for each motor.
  • The following parameters in the MCSA Spectrum viewer have fixed values:
    • frequency range: 0 to 310 Hz
    • frequency resolution: 0.016667 Hz
    • lines of resolution: 18,600
  • The spectrum based on the motor current magnitude is in decibels. The decibel reference is the fundamental component magnitude value.

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
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.
Locate the rotor bar sideband harmonics in the spectrum. Click the Cursor menu on the viewer toolbar and select Sideband or Harmonic. Use the cursors to locate the fundamental component and the rotor bar sideband harmonics in the spectrum.

Related link: Adding Harmonics and Sidebands to Viewers
Set the fundamental frequency. Click Settings on the viewer toolbar and enter a value in the Fundamental (Hz) field.
Set the sideband delta frequency. Click Settings on the viewer toolbar and enter a value in the Sideband delta (Hz) field.
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.

Related Information

Adding, Changing, and Removing Viewers

Showing, Hiding, and Removing Viewer Data

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