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Analyze and Advanced Analyze
Option
Peak Hold Average
Synchronous Time
Order Tracking
Negative Average
Exponential Average
6.7.5
PeakVue and demodulation
The analyzer can use PeakVue technology or demodulation when collecting data. PeakVue
technology samples data faster than demodulation to detect high-frequency stress waves.
PeakVue data is trendable, but demodulation is not.
108
Description
Display the largest amplitude of each spectral line. Use this
option during a machine coast down or to monitor random
fluctuations such as steam whirl or oil whirl.
Remove the vibration of other machines from the signal, so
only the vibration from the reference machine remains. The
analyzer synchronizes each data sample with a tachometer
pulse, computes the average, and creates the spectrum
from the averaged waveform.
Use Synchronous Time when you need data directly related to
the turning speed of a specific shaft, or when several
machines or shafts on one machine turn at slightly different
speeds.
Note
A tachometer is required with this mode.
Monitor machines where the speed is changing during data
collection. Order Tracking helps normalize data so it does not
look smeared. You must use a tachometer and a reference
pulse. A tachometer pulse controls the data acquisition rate
to account for variations in machine RPM.
Dynamically subtract one spectra from another while the
machine runs. Negative Average reduces the number of
spectra and compares the results with the results of a
normal averaging or with bump test data to help isolate
potential problems. The larger the number of spectra used
for averaging, the more the noise spikes in vibration signals
are reduced, and the more accurately true spectral peaks are
represented.
Average each new spectra with all prior ones in the decay
exponential form, where the rate of decay is set by the
averages value. A smaller average shows the vibration with a
faster decay or rate of change. Use this advanced method if
vibration behavior varies significantly during measurement.
Note
Do not use for routine data collection.
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