Description
Bently 3500-25-01-01-00
Technical Specifications
- Module Type: Keyphasor Signal Conditioner
- Input Compatibility: Proximity probe signals (Bently Nevada 3300 XL series)
- Signal Processing: Pulse shaping, filtering, and threshold detection
- Output: Digital keyphasor pulses to the 3500 backplane
Functional Features
- Phase Reference Generation: Delivers a highly accurate once-per-revolution pulse to synchronize vibration measurements with shaft rotation.
- Signal Conditioning: Filters out electrical noise and harmonics to ensure clean keyphasor pulses even in electrically noisy industrial environments.
- Multi-Channel Support: Processes keyphasor inputs for multiple channels to support complex multi-shaft machinery trains.
Application Scenarios
Critical for power generation and petrochemical applications involving steam turbines, gas turbines, and centrifugal compressors where phase-resolved vibration analysis, orbit plots, and polar plots are required for predictive maintenance.
Performance Parameters
- Input Frequency Range: Optimized for typical rotating machinery speeds up to high RPM limits
- Signal-to-Noise Ratio: High immunity to EMI/RFI interference
- Response Time: Minimal propagation delay for precise phase alignment
Material Composition
Enclosed in a rugged, shielded metal housing with high-quality internal signal conditioning circuitry designed for continuous industrial operation.
Structural Characteristics
Standard full-height 3500 module form factor with front-panel status indicators and rear I/O connectors for proximity probe signal inputs and backplane communication.
Working Principle
Accepts the raw analog signal from a proximity probe, applies programmable threshold detection and pulse shaping to generate a clean digital pulse corresponding to a specific shaft reference mark (such as a keyway or notch).
Installation Requirements
Install in any available monitor slot in the 3500 rack. Configure the module using the 3500 Configuration Software to match the input signal characteristics and expected shaft speed range.
Usage Precautions
Ensure the proximity probe signal is properly conditioned and within the acceptable input voltage range. Verify correct phase rotation and keyphasor polarity during system commissioning to avoid reversed phase readings.
