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and
and
Mount the sensor on the bearing housing at the measure location with the highest vibra-
tion values.
The measure plane should be in the middle of the bearing and close to the bal-
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ancing plane and the plane of the center of gravity (for example, impeller side or
rotor).
Vibrations are transferred through the outer ring of a bearing in a radial direction.
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Thus, mount the sensor on the side (horizontal) or on the top of the bearing (ver-
tical).
Attach the sensor as close to the bearing as possible. Prevent signal attenuation
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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.
Use sensors which are screwed onto the machine or attach sensors using a mag-
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netic adapter. Do not attach sensors to machine parts with intrinsic vibrations such
as covers.
Do not use hand-held probes to measure imbalance.
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If you measure imbalance in two planes, use the above instructions for both
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planes.
Assess the machine smoothness.
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VIBXPERT 3
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
On-board help
101
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