Description
Bently 3500-42M-01-00
Technical Specifications
- Module Type: Dual-Channel Vibration/Displacement Monitor
- Sensor Compatibility: 3300 XL Eddy Current Probes, 330400/330500 Accelerometers/Velocity Sensors
- Measurement Parameters: Peak-to-Peak Vibration, 1X/2X Amplitude & Phase, Gap Voltage, Smax
- Alarm Outputs: Alert and Danger setpoints with programmable delays
Functional Features
- Dual Parameter Monitoring: Simultaneously measures and reports both steady-state vibration levels and transient dynamic data.
- Synchronous Filtering: Built-in tracking filters isolate 1X and 2X vibration components for unbalance and misalignment diagnostics.
- Self-Checking: Comprehensive internal diagnostics including sensor open/short detection, calibration verification, and memory integrity checks.
- API 670 Compliance: Meets or exceeds all requirements of the API 670 Machinery Protection Standard.
Application Scenarios
The workhorse of any 3500 system, deployed on every bearing pedestal of steam turbines, gas turbines, compressors, pumps, and motors for radial vibration and axial displacement monitoring.
Performance Parameters
- Measurement Accuracy: ±1% of full scale
- Frequency Response: DC to 10 kHz for proximity inputs; optimized filtering for seismic inputs
- Dynamic Range: Wide range to accommodate both normal operation and severe transient events
Material Composition
Precision-manufactured with high-grade electronic components and shielded internal circuitry to maintain measurement integrity in harsh industrial environments.
Structural Characteristics
Standard full-height 3500 module with front-panel channel status LEDs, Bypass/Reset pushbuttons, and rear I/O connectors for sensor inputs and backplane communication.
Working Principle
Conditions the analog sensor signals through amplification, filtering, and analog-to-digital conversion. Digital signal processing algorithms extract vibration amplitudes, phase angles, and gap voltages, comparing them against programmed alarm setpoints to trigger protective actions.
Installation Requirements
Install in any available monitor slot. Configure sensor type, sensitivity, scaling, and alarm setpoints using the 3500 Configuration Software. Verify proper sensor gap voltage during installation.
Usage Precautions
Always match the module configuration to the actual installed sensor type and sensitivity. Never bypass alarms without documented authorization. Perform regular system calibration checks using a certified calibrator.
