VIBTOOL 02.2009
44
Interference from external light sources
It is important to note the following three points in order
for a correct signal to be obtained when taking RPM
measurements.
1. Reflections from shiny objects can lead to instable
signals because the light which VIBTOOL detects is
fluctuating.
2. VIBTOOL must be pointed radially at the shaft and from
underneath the shaft wherever possible. This avoids any
interference from light coming from above.
3. Make sure that local lighting does not shine directly into
the VIBTOOL optical sensor or onto the contrast mark.
In case of interference from external light sources, such
as fluorescent lamps, a flashlight may be used to obtain
a stable light signal. Simply illuminate the shaft and
contrast mark using the flashlight.
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Note
RPM measurement
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