VC-6000
TM
Compact monitor Part C Vibration measurement
- 32 - C100583.002 Components Vers. 07 © VC-6000
TM
Compact monitor Sept. 2011
9 Vibration measurement
9.1 Function
♦ Vibration measurement is a Firmware component for the acquisition of
vibration from one AC signal.
♦ The vibration signal detection type is selectable between RMS, Peak
and Peak-peak.
♦ The RMS value (Root Mean Square) is identical to the effective value of
a vibration signal (AC-Signals). Mathematically this corresponds to the
the root from the square average value and is therefore a measure of
the energy content of a vibration.
♦ The Peak value is the maximum value of a vibration signal within a
prescribed measurement time period. It is thereby an over-energetic
measured variable which, in contrast to the RMS value, is not directly
related to the signal energy.
♦ The Peak-peak value is an absolute value of the sum of the maximum
positive and maximum negative values of vibration within a prescribed
measurement time period. It is thereby an over-energetic measured
variable which, in contrast to the RMS value, is not directly related to the
signal energy.
♦ The vibration measurement is an optional signal path component which
as a configuration interface contains all the parameters necessary for
the setup..
♦ The physical units of measurement can be set up as parameters.
♦ Through the parameter „Measurement time“ the various signal detection
types can be configured.
♦ The current measured value can be fed to downstream electronic
equipment as an analogue DC value.
♦ The current measurement can be read by a downstream OPC server
over the Interface and Communication module.
♦ The vibration measurement can be monitored for limit value violation by
one or more Monitor-blocks.
Note:
The vibration measurement block can be used only with pure AC signals (i.e.
without a DC offset) because the algorithm cannot calculate and extract any
DC component in the signal. A preceding highpass filter must always be
used to filter out the DC component of the measured signal!
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