Posted to News on 10th Apr 2011, 22:21
High-frequency accelerometer monitors power transmissions
PCB Piezotronics is launching the 621B40 high-frequency industrial accelerometer that operates to 30kHz for gear mesh and bearing fault analysis. The 621B40 works with online or portable monitoring systems to provide reliable and effective vibration monitoring. It operates to 30kHz even with a magnetic mount - a feat that is said to be almost unheard of in the condition monitoring industry - and captures high-frequency gear mesh faults that are often missed during routine route-based measurements.
Due to the sensor's high frequency range, it is suitable for measurements on high-speed compressors, gearboxes and turbomachinery to provide early detection of impending problems. When analysing the condition of an integral gear compressor, for example, a technician needs to be able to examine gear mesh frequency and its sidebands. The harmonics of the gear mesh and natural frequency of the gears play a significant role in diagnosing potential machinery faults. With a magnetically-mounted 621B40 supplying a response to more than 30kHz, a vibration analyst can obtain precise measurements of these revealing high-frequency phenomena.
For even higher frequency measurements, PCB Piezotronics can supply its 352A60 sensor that features an upper frequency range of 60kHz at +/-3dB and is designed to work with a stud-mount adhesive base (supplied).
Principal performance specifications of the 621B40 sensor include sensitivity of 10mV/g, measurement range of +/-500 'g' and frequency range from 1.6Hz to 30kHz (+/-3dB). Shock resistant to 10,000 'g' peak, the 621B40 operates within the temperature range -54 to +121degC. Contact PCB Piezotronics for more information about the 621B40 or 352A60 vibration sensors.
