330500 Velomitor® Piezo-Velocity Sensor0 pages

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Velomitor* Piezo-velocity Sensor

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Bently Nevada* Asset Condition Monitoring

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Description

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Velomitor* Piezo-velocity Sensors measure absolute (relative to free space)

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bearing housing, casing, or structural vibration. Unlike moving-coil velocity

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transducers, such as the Bently Nevada Seismoprobe* family of velocity

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transducers, Velomitor Piezo-velocity sensors are specialized piezoelectric

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accelerometers that incorporate embedded integrated electronics in a solid-

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state design. Because they incorporate solid-state electronics and have no

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moving parts, they do not suffer from mechanical degradation and wear, and

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can be mounted vertically, horizontally, or at any other angle of orientation.

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Bently Nevada™

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Asset Condition Monitoring

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MADE IN USA

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MANUFACTURER NO. 3536

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VELOMITOR®

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PN 330500

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100 mV/in/s (4mV/mm/s)

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Application Advisory

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If you plan to make housing measurements for overall machine protection,

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consider the usefulness of the measurement for each application. Most

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common machine malfunctions (imbalance, misalignment, etc.) originate at

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the rotor and cause an increase (or at least a change) in rotor vibration. For

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any housing measurement to be effective for overall machine protection,

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the machine must faithfully transmit a significant amount of rotor vibration

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to the bearing housing or machine casing, or more specifically, to the

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mounting location of the transducer. In addition, you should exercise care

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in the physical installation of the transducer. Improper installation can

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degrade the transducer's performance, and/or generate signals that do not

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represent actual machine vibration. Integration of the output to

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displacement can make this worse. Exercise extreme caution if integrating

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to displacement in any case.

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Upon request, we can provide engineering services to determine the

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appropriateness of housing measurements for the machine in question and/or

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to provide installation assistance.

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C€ <i © £©

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c us

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Specifications and Ordering Information

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Part Number 141632-01

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Rev. G (06/09)

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Page lof 8

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imagination at work

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