330425-01-05 BENTLY NEVADA Accelerometer Acceleration Transducers

These accelerometers are intended for critical 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 for accelerometers.  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.  

Most common machine malfunctions (unbalance, misalignment, etc.) occur on the rotor and originate as an increase (or at least a change) in rotor vibration. For any individual casing measurement to be effective for overall machine protection, the system must continually transmit a significant amount of rotor vibration to the machine casing, or mounting location of the transducer. In addition, be careful to install the accelerometer transducer on the bearing housing or machine casing. Improper installation may decrease the transducer amplitude and frequency response and/or generate false signals that do not represent actual vibration.