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Bently 3500/44M 176449-03

Product Introduction:
A high-performance 4-channel monitor engineered for aeroderivative gas turbines. It processes signals from accelerometers, velocity sensors, eddy-current probes and dynamic pressure transducers to deliver combustion instability, blade-pass tracking, 1X vibration vectors and multi-mode alarms with ±0.1 % accuracy. The module is SIL-capable and certified for hazardous areas worldwide.
Technical Specifications:
  • Channels: 4 high-speed dynamic inputs
  • Input Types: 3300 XL proximity, Velomitor, IEPE accelerometer, piezo pressure
  • ADC Resolution: 24-bit
  • Sampling Rate: 51.2 kHz per channel
  • Frequency Range: 0.05 Hz – 20 kHz user-configurable
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Detailed content

  • FFT Points: Up to 65,536
  • On-board Storage: 64 GB SSD for waveform & spectral archives
  • Measurements: Radial vibration, axial displacement, 1X vector tracking, combustion instability index
  • Alarm Set-points: 8 groups, user-programmable low/high speed levels
  • Communication: Back-plane + 10/100BASE-T Ethernet for direct data export
  • Power: 24 VDC from rack, 7.8 W max
  • Operating Temperature: –40 °C to +85 °C
  • Storage Temperature: –40 °C to +85 °C
  • Humidity: 95 % RH non-condensing
  • Protection: IP20 front, epoxy-sealed electronics
  • Dimensions: 241.3 × 24.4 × 241.8 mm
  • Weight: 0.91 kg
  • Agency Approvals: ATEX Ex ia IIC T4 Ga, IECEx, CSA Class I Div 2, SIL 2 capable
Functional Features:
  • 24-bit ADC captures micro-variations in vibration signals
  • 51.2 kHz sampling detects high-frequency blade-pass harmonics
  • 64 GB SSD archives pre- and post-event waveforms for root-cause analysis
  • Ethernet port exports real-time spectra to 170180-01-00 software or plant historian
  • Combustion instability index distinguishes flame-out from mechanical vibration
  • Hot-swappable without rack shutdown
Application Scenarios:
  • Combined-cycle gas turbine high-pressure rotor – detects 3× speed harmonics indicative of blade cracking months before failure
  • LNG centrifugal compressor – identifies impeller unbalance via side-band analysis around blade-pass frequency
  • Offshore drilling rig mud-pump gearbox – captures bearing defect frequencies in 20 kHz band and transmits data to onshore engineers

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