BRUEL & KJAER VIBROCONTROL 8000 - 24.4.6 Low Frequency Velocity; 24.5 Pressure and Sound; 24.5.1 Accoustic; 24.5.2 Dynamic Pressure

© Brüel & Kjaer Vibro ● S1079330.002 / V04 ● █ Page 173 of 188
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Brüel & Kjaer Vibro │ Instruction
VC-8000 MPS
Content
EN
24.4.6 Low Frequency Velocity
Typical uses: Fans or other low speed machinery.
Measurement Description Default or Add
Direct
Overall dynamic amplitude measurement. Integrating
results in displacement. The Low Frequency Velocity
channel can be configured for integration as low as 1 Hz.
24 dB/octave (4 pole) filter roll-on, -24 dB/octave (4 pole)
roll-off.
Default
Bias
DC sensor bias voltage for diagnostics.
Default
24.5 Pressure and Sound
24.5.1 Accoustic
Typical uses: Sound level measurements
Measurement Description Default or Add
Direct (primary)
A-weighted wideband sound level from 20 to 20 kHz.
Default
Bias
DC sensor bias for diagnostics.
Default
Band-pass
filters 1 to 8
Typically used for sound level octave filtering.
Default
24.5.2 Dynamic Pressure
Typical uses: Cavitation, Humming
Measurement Description Default or Add
Direct
Bandpass filtered dynamic amplitude.
84 dB/octave (14 pole) roll-on, roll-off
Default
Bias
DC sensor bias voltage for diagnostics.
Default
Pressure Band-
pass 1
Bandpass filtered dynamic amplitude.
84 dB/octave (14 pole) roll-on, roll-off
Add (if needed)
Pressure Band-
pass 2
Bandpass filtered dynamic amplitude.
84 dB/octave (14 pole) roll-on, roll-off
Add (if needed)
Pressure Band-
pass 3
Bandpass filtered dynamic amplitude.
84 dB/octave (14 pole) roll-on, roll-off
Add (if needed)