Fluke 810 User Manual page 137

3. The Tester says "serious" or "extreme" but
there is no indication of failure, what should I
do?
For extreme faults, users should be able to
sense impending failure through excessive
temperature, noise or visible movement. If there
are no physical indications of failure, it is
recommended to check the machine setup
inputs in the Tester and retake the
measurement. Improper machine setup,
incorrect running speed (RPM) or improper
measurement technique may result in an
inaccurate diagnosis. The diagnostic quality is
directly related to the quality and quantity of
information provided to the Tester.
4. The Tester says "slight" or "moderate," but
there appears to be extreme vibration levels,
what should I do?
There are certain situations like a machine
installed on a flexible foundation where
excessive vibration can be detected. This type of
vibration is not necessarily bad, but is rather by
design.
It is still recommended to check the machine set
up input values and retaking the measurement if
there is any doubt with the diagnostic results.
Frequently Asked Questions
5. What are some of the causes of bad data and
diagnosis?
The following will result in poor data collection
and inaccurate diagnoses:
•
Improper speed input
•
Improper machine setup
•
Thermal transients, machine not up to
normal operating temperature
•
Sensor overload, most often from not
allowing sensor to equalize in temperature
prior to collecting data
•
Improper measurement locations
•
Taking measurements from a machine that is
cycling or surging on and off
Confirm machine setup values and take
measurements again.
A
FAQs - Diagnosis
A-9