Overview VC 1100
Version 2 → overview//VC1100E
1-4 C01 / C02 - C11 / C12 © Schenck VIBRO GmbH, D-64273 Darmstadt, November 97
BCU averaging
The BCU value may vary depending on the operating conditions of
a machine, for example due to varying loading conditions.
A defective anti-friction element which regulary changes its
position in such a way that the damaged part comes into contact
with the bearing running surface only after several revolutions, will
also cause varying BCU values.
Variations of that kind do not allow the conclusion that the bearing
is damaged.
The measured value can be averaged by means of a filter with
settable time constant (averaging time 10 ... 3600 secs.) in order
that these "variations" (which do not represent the normal
condition of the machine) don't cause an alarm message.
The bigger the selected averaging time
− the more stable the measured value (particularly important for
trend considerations)
− the more delayed the response behaviour of the limit value
monitoring.
The averaging be switched on and off separately for channel A
and channel B (parameters J15 ... J18).
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