and
and
Correction planes
Non-drive end (NDE)
Shows direction of machine rotation
Shows the mounted vibration sensor
Shows the laser trigger/rpm sensor
Reference mark
Drive end (DE)
Shows the measure plane
Mount the sensor on the bearing housing at the measure location with the highest vibra-
tion values.
l
The measure plane should be in the middle of the bearing and close to the bal-
ancing plane and the plane of the center of gravity (for example, impeller side or
rotor).
l
Vibrations are transferred through the outer ring of a bearing in a radial direction.
Thus, mount the sensor on the side (horizontal) or on the top of the bearing (ver-
tical).
l
Attach the sensor as close to the bearing as possible. Prevent signal attenuation
due to long transmission paths or bearing covers. Measure in the direction of vibra-
tion (mostly horizontal). If the measure direction is horizontal, mount the sensor
on the lower half of the bearing housing.
l
Use sensors which are screwed onto the machine or attach sensors using a mag-
netic adapter. Do not attach sensors to machine parts with intrinsic vibrations such
as covers.
l
Do not use hand-held probes to measure imbalance.
l
If you measure imbalance in two planes, use the above instructions for both
planes.
l
Assess the machine smoothness.
VIBXPERT 3 101
On-board help
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