Vibration analyzers conduct a sophisticated analysis of
machine condition. They analyze vibration spectra (vibration
amplitude versus frequency), create a baseline for the tested
equipment and trend the results over time. This sophisticated
analysis not only provides information about whether there is
a problem, it also helps users understand the root cause and
time to failure. However, this traditional type of vibration
troubleshooting requires a significant amount of training and a
strong understanding of the spectra and equipment’s history.
When to use:
• For big, complex machines with many variables, such as
paper machines, multi-axis machines, turbines and etc.
• For troubleshooting using real time analysis, bump testing,
cross channel phase and resonance testing for faults other
than the four common faults described above.
A vibration pen is a single-use tool that measures vibration
caused by rotational and structural problems and can help
identify some rolling element bearing or gear mesh problems.
Vibration pens are easy to use and provide a simple number of
the overall vibration coming from the machine. However, the
number requires knowledge about the machine to determine
what the number means.
When to use:
• For simple screening of less complex machines.
When you move up to a vibration meter, you have the capability to measure overall vibration in addition to a database of
real machine values to provide the user with an answer. The
Fluke 805 Vibration Meter, for example, has a combination
vibration and force sensor tip that compensates for user variance (force or angle) — yielding accurate, repeatable readings.
When to use:
• Check all machines — hundreds of expendable machines
as well as a quick check of the critical machines daily
in-between testing by the analyst.
• For screening all machines (100 percent): use overall
vibration, bearing impacts and bearing temperature to
determine is machine is good or bad. The vibration meter
1. Overall vibration level
2. Machine health severity level
3. Bearing impacting
4. Bearing health severity level
5. Bearing temperate.
Vibration testing provides automated diagnosis of the
most common faults on most rotating machines — specific
fault, fault severity and repair recommendation. The tester
starts as a four-channel vibration data collector, but then
many features and functions are modified to make it easy
A maintenance technician using
Fluke's 810 Vibration Analyzer Tool.