BRUEL & KJAER VIBROCONTROL 8000 - 24.11.7 Eccentricity; 24.11.8 Shaft Absolute RV; 24.11.9 Shaft Absolute Vel; 24.11.10 Valve Position

© Brüel & Kjaer Vibro ● S1079330.002 / V04 ● █ Page 181 of 188
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Brüel & Kjaer Vibro │ Instruction
VC-8000 MPS
Content
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24.11.7 Eccentricity
Typical uses: Steam turbine eccentricity
Measurement Description Default or Add
PP Eccentricity
Peak to peak eccentricity measurement.
Default
Gap
DC sensor Gap voltage for diagnostics.
Default
Min
The minimum position measured during a single shaft
rotation.
Default
Max
The maximum position measured during a single shaft
rotation.
Default
Ecc Position
The shaft position. Below the crossover speed Ecc Position
is the instantaneous measured position. Above the
crossover speed Ecc Position is the average position.
Default
24.11.8 Shaft Absolute RV
Typical uses: Shaft vibration measurements where the absolute casing vibration is large. Also used
as replacement for shaft-riders.
Measurement Description Default or Add
Shaft Abs
Direct
Summation of the relative direct with the integrated case
velocity to obtain the absolute vibration displacement.
Default
Direct
Shaft relative overall dynamic amplitude measurement.
6 dB/octave roll-on, -6 dB/octave roll-off.
Default
Gap
DC sensor Gap voltage for diagnostics.
Default
1X amplitude
and phase
Shaft relative synchronous amplitude and phase
measurement at running speed.
Default
24.11.9 Shaft Absolute Vel
Typical uses: Shaft vibration measurements where the absolute casing vibration is large. Also used
as replacement for shaft-riders.
Measurement Description Default or Add
Velocity Direct
Casing velocity dynamic amplitude measurement.
24 dB/octave (4 pole) roll-on, -24 dB/octave (4 pole) roll-off
Default
Intg Direct
Casing velocity integrated to displacement dynamic
amplitude measurement. Used in the Shaft Absolute
calculation
24 dB/octave (4 pole) roll-on, -24 dB/octave (4 pole) roll-off
Default
Bias
DC sensor bias voltage for diagnostics
Default
1X amplitude
and phase
Casing velocity integrated to displacement synchronous
amplitude and phase measurement at running speed
Default
24.11.10 Valve Position
Typical uses: Steam turbine valve position measurement using an AC LVDT and transmitter.
Measurement Description Default or Add
Valve Position
Measures the valve % open or % closed
Default
Bias
The sensor bias voltage for diagnostics
Default