BCU measurement Part C VC-6000
TM
Compact monitor
© VC-6000
TM
Compact monitor Sept.2011 C100583.002 Components Vers. 07 - 25 -
6 BCU measurement
6.1 Function
♦ The BCU value is a proprietary measurement variable for the
assessment of rolling-element bearing condition according to the
BEARCON technique.
♦ BCU measurement is an optional signal path component. As a
configuration interface, it also contains a group of parameters necessary
for the setting.
♦ The BCU value to be calculated is formed over an adjustable averaging
time. New measured values are only presented each time after the
averaging time has run.
♦ For a better comparison of the measurements from various bearings /
machines the BCU value can be normalised. This is sensible especially
after maintenance work or a bearing has been replaced.
♦ The current value can be displayed using the User-terminal.
♦ The current value is also available as an analogue DC output signal for
peripheral electronic equipment.
♦ The current measured value can be read through the COM interface of
a downstream OPC-server.
♦ The BCU value can be monitored for limit setpoints through one or more
Monitor blocks.
6.2 Parameters and setting ranges
♦ <Averaging time>
The parameter of averaging time determines over which time interval
the BCU measurement will form its value. The averaging time can be
changed within its setting range.
The averaging time and update interval for the measurement are
identical.
Setting range for BCU averaging time:
Minimum: 0.01 s Maximum: 99.99 s Step size: 0.01s
Works pre-setting 1.00 s
Advice for setting the averaging time:
Longer averaging times improve the reproducibility and reliability of the
measurement but are costly in terms of time resolution.
Shorter averaging times increase the time resoution of the measurement at
the cost of reproducibility.
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