20
Rubber sleeve in contact with the
surface. Hold steady.
Built-in sensor with probe
Measuring points for the built-in probe should be
clearly marked. Always measure in the same spot.
The probe tip is spring loaded and moves within a
sleeve of hard rubber. To maintain a steady pressure on
the tip, press the probe tip against the measuring point
until the rubber sleeve is in contact with the surface.
Hold the probe steady to avoid rubbing between the
probe tip and the machine surface.
The probe is directionally sensitive.
The centre of the
probe tip should touch the surface. Avoid pressing the
probe tip against cavities and fillets which are smaller
than the probe tip.
The only part likely to wear out is the rubber sleeve
for the probe tip. It is made of chloroprene rubber
and tolerates 110° C (230° F). Spare sleeves have part
number 18128.
Avoid small cavities and fillets.
Measuring points
Vibration severity is primarily a measure for general
machine condition. Vibration at the measuring point
should be representative for the overall vibration of the
machine. Typical measuring points are on the bearing
housings. By measuring in three directions, one can
get an indication of the causes for increased vibration.
• Horizontal vibration (H) in the plane of rotation is
most representative of balance condition.
• Vertical vibration (V) in the plane of rotation is most
representative of structural weakness.
• Axial vibration (A) along the line of the shaft is most
representative of faulty alignment and bent shafts.
To get comparable results, the measuring points should
be clearly marked, so that measurements can always
be taken in the same spots.
The firmer the contact with the machine, the better
the measuring result. Plain, clean metal makes the best
contact surface for the vibration sensor.
Содержание VibChecker
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