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Figure 31: Frequency analysis menu
The peak value spectrum of the currently measured acceleration or velocity is shown in Figure 32).
Figure 32: Spectral display for acceleration and velocity
The vertical axis of the diagram represents the peak value with linear scaling and the horizontal axis the frequency. The diagram shows 125 lines. The frequency range
in display can be halved by pressing F1 and doubled by pressing F2. The following ranges are available: 23, 46, 91, 188, 366 and 732 Hz for velocity and additionally
for acceleration 1466, 2928, 5856 and 11712 Hz. The velocity ranges follow after the accelerations by further pressing F2. Acceleration and velocity spectra can be
distinguished by the headline and a different color of the cursor line.
The left end of the frequency axis always represents 0 Hz. However, the 0 Hz line and for velocity also the next line are not displayed to suppress DC and low noise
errors.
The line above the diagram shows magnitude and frequency of the main spectral line.To measure the spectral lines the cursor can be moved along using the ◄►
keys.
The red pointer below the diagram marks the cursor position. The currently measured spectral line is highlighted red. The frequency and amplitude are also displayed
below the diagram.
The amplitudes can be scaled using the Auto-range function. In the case of variable signals this can cause an instable spectrum. If so, select between auto-ranging
(“Ampl. auto”) and fixed amplitude scaling (“Ampl. fixed”) by pressing OK repeatedly. In the case of fixed amplitudes, the scaling type most recently selected is retained.
You can save the spectrum by pressing the ▼ key. Press F3 to exit the spectral view.
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