BRUEL & KJAER VIBROCONTROL 8000 - 24.8.3 Recip Impact; 24.8.4 Recip Rod Drop; 24.9 Rolling Element Bearing Monitoring; 24.9.1 Enveloped Acceleration (Don’t use)

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24.8.3 Recip Impact
Typical uses: Detection of mechanical looseness on reciprocating machines.
Measurement Description Default or Add
Impact Count
Count of mechanical impact events that exceeded the
configured threshold occurring within the set time window.
Default
Maximum
The maximum peak acceleration value measured. Used to
set the Impact Count threshold.
Default
Bias
DC sensor bias voltage for diagnostics.
Default
24.8.4 Recip Rod Drop
Typical uses: Rider band wear measurements on non-lubricated or lightly lubricated horizontal
reciprocating compressors.
Measurement Description Default or Add
Average Piston
Position
The piston position calculated from the measured probe
Gap at the average probe position over a stroke.
Default
Average Gap
The probe Gap at the average probe position over a stroke.
Default
Triggered
Piston Position
The piston position as calculated from the probe to rod
instantaneous Gap measured at the configured trigger
angle.
Default
Requires PT
Triggered Gap
The probe to rod instantaneous Gap measured at the
configured trigger angle.
Default
Requires PT
24.9 Rolling Element Bearing Monitoring
There are five channel types targeted specifically for machines with Rolling Element Bearings (REB).
They are:
Channel Type
Description
Enveloped Acceleration
Don’t use.
REBAM
Special use with Proximitor. Don’t use in other cases.
REB Acceleration
Good to use when there is not a phase trigger (no PT).
REB Acceleration (slow)
Good to use for low speed machines (no PT)
Tracking REB
Acceleration
Best to use (with a PT)
24.9.1 Enveloped Acceleration (Don’t use)
Don’t use.