Catalogue - Acceleration Transducers - GE Energy Bently Nevada

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Spécifications and Ordering Information 330400 and 330425 Accelerometer Accélération Transducers

	Description Thèse accelerometers are intended forcritical machinery applications where casing acceleration measurements are required, such as gear mesh monitoring. The 330400 is designed to address the requirements of American Petroleum Institute Standard 670 foraccelerometers. It provides an amplitude range of 50 g peak and a sensitivity of 100 mV/g. The 330425 is identical except it provides a larger amplitude range (75 g peak) and a sensitivity of 25 mV/g. A Caution If housing measurements are being made for overall protection of the machine, thought should be given to the usefulness of the measurement for each application. Most common machine malfunctions (imbalance, misalignment, etc.) originate at the rotor and cause an increase (or at least a change) in rotor vibration. In order for any housing measurement alone to be effective for overall machine protection, a significant amount of rotor vibration must be faithfully transmitted to the bearing housing or machine casing, or more specifically, to the mounting location ofthe transducer. In addition, care should be exercised in the physical installation ofthe transducer. Improper installation can result in a degradation of the transducer's performance, and/or the generation of signals which do not represent actual machine vibration. Integration of the output to velocity can worsen this. Extreme caution should be exercised if integrating to velocity. For high quality velocity measurements the 330500 Velomitor® Sensor should be used. Upon request, Bently Nevada can provide engineering services to determine the appropriateness of housing measurements for the machine in question and/or to provide installation assistance.

Specifications Parameters are specified from +20 to +30 °C (+68 to +86 °F) and 100 Hz unless otherwise indicated. Note: Operation outside the specified limits may result in false readings or loss of machine monitoring.

Electrical 330400 Sensitivity:		10.2 mV/m/s²(100 mV/g) ±5%.

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FOR REFERENCE ONLY REFER TO DOCUMENT #141638		Page 1 of6

Acceleration Transducers - GE Energy Bently Nevada - #1

Accelerometer, Piezoelectric sensor, Vibration monitoring system, Proximity sensor, Pressure transducer