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© Brüel & Kjær Vibro
● C106834.002 / V06
Technical alterations reserved!
EN
- Recommended envelope filters:
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Calculating all critical frequencies at once leaves an untidy graph that is difficult to read. Study
each predominant critical frequency and its harmonics as well as sidebands on an individual
basis. A number of narrow band-pass filters must be used. Two of them can be analyzed
simultaneously.
By sending the same CCS accelerometer input signal to more than one channel, the same
VIBROCONTROL 18xx can produce up to eight different bearing analyses simultaneously.
The desired critical frequency can be selected under "Use filter." The corresponding filters are
calculated automatically by the Compact Setup software.
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~ Minimum bandwidth (in Hz):
Under Minimum bandwidth, the most suitable bandwidth is calculated and set automatically by
the Compact Setup software.
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~ Name:
The name is generated automatically and is composed of: "Bearing model" + "Filter."
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~ Low limit frequency (Low Limit Freq) (in Hz):
Depending on the parameter settings, the low limit frequency is set automatically.
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~ High limit frequency (Upp Limit Freq) (in Hz):
Depending on the parameter settings, the high limit frequency is set automatically.
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- Bearing frequencies & envelope filter diagram:
The calculated critical frequencies can be displayed in a graph. To have a clear overview it is
once again recommended to display the rotation speed ("Show Rotation Speed (ROT))" and
one or only a few critical frequencies in the graph. In the view below, in addition to "Show
Rotation Speed (ROT)," "Show BPFI" was selected. If critical frequencies will be displayed in
the diagram, they must be marked in the bearing frequency calculator.