•
Fundamental peak (Index 4553 - 4554)
°
Peak with the lowest frequency
°
Represents e.g. the speed of the monitored system
°
Always corresponds to peak 1 in the standard analysis.
Figure 18: Fundamental and Dominant peak
Fundamental peak and Dominant peak often represent the same frequency, because e.g.
the vibration with the machine speed is both the strongest signal component and the
signal component with the lowest frequency. If another signal component with a differ‐
ent frequency occurs, which has a higher amplitude than the vibration at the fundamen‐
tal frequency, this results in the Fundamental peak and Dominant peak representing two
different peaks. This is a strong indicator of a change in the condition of the machine.
For the Dominant peak and Fundamental peak, the current frequency and amplitude as well
as the minimum or maximum values since the last reset are available.
Monitoring in the reduced analysis
To monitor the Dominant and Fundamental peak, appropriate limit values can be set for
the frequency and amplitude of the respective peaks. Thus, as shown in figure 19, the
peak is monitored in the X direction (frequency) as well as in the Y direction (amplitude).
Figure 19: Limit values of Dominant peak frequency analysis
9
OPERATION
36
O P E R A T I N G I N S T R U C T I O N S | MPB10 8028041/2022-08-16 | SICK
Subject to change without notice
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