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Description
Product Overview
Product Name: Vibration Monitor / Seismic Transmitter Monitor
Full Assembly Model: 3500/33-01-01
Component Parts: 149986-01 (Monitor Module) + 149992-01 (Power Supply Module)
Manufacturer: Bently Nevada (A Baker Hughes Business)
System Compatibility: 3500 Machinery Management System
The Bently Nevada 3500/33-01-01 is a critical 4-channel monitor module designed for the 3500 rack-based system. Its primary function is to continuously monitor the overall vibration (seismic) levels of machinery by accepting signals from proximity transducers or accelerometers. It is a fundamental component for machinery protection systems (MPS), providing early warning of developing faults to prevent catastrophic failure in large industrial equipment such as turbines, compressors, pumps, and fans.
The designation indicates that this is a complete, ready-to-use assembly consisting of two key parts plugged into a single slot:
- 149986-01: The actual 4-channel vibration monitor module.
- 149992-01: The required internal power supply module that provides isolated power to the monitor.
Key Features
- 4-Channel Design: Allows a single module to monitor vibration from four independent points on a machine, reducing rack space and cost per point.
- Dual Dynamic Inputs: Accepts signals from a wide range of velocity transducers (e.g., 100 mV/in/sec) and accelerometers (with built-in or external integrators to convert to velocity).
- Comprehensive Monitoring: Continuously measures and monitors overall vibration amplitude (peak or RMS).
- Advanced Alarm Logic: Provides two dedicated alarm setpoints (Alert and Danger) per channel with programmable latching and time delays to prevent nuisance shutdowns.
- Built-in Diagnostics: Features extensive self-test capabilities and continuously validates the health of the connected sensors and wiring (e.g., OK, Check Channel, Bypass).
- TDI (Transducer Data Interface) Compatible: Supports Bently Nevada’s smart TDI sensors for enhanced data collection and diagnostics.
- Redundant Architecture: Operates within the redundant 3500 framework, which can include redundant power supplies and modules for critical applications.
Technical Specifications
The following table details the key technical parameters for the 3500/33 module.
| Parameter | Specification |
|---|---|
| System Framework | Bently Nevada 3500 Series Rack |
| Module Type | 4-Channel Vibration (Seismic) Monitor |
| Full Assembly | 3500/33-01-01 |
| Monitor Module | 149986-01 |
| Power Supply Module | 149992-01 |
| Input Channels | 4 independent channels |
| Input Types | Velocity Transducers (e.g., 100 mV/in/sec) Accelerometers (requires integration to velocity) |
| Frequency Response | Typically 4.5 Hz to 2000 Hz (User-selectable high-pass and low-pass filtering) |
| Dynamic Range | Up to 2.0 inches/sec (50.8 mm/sec) peak (velocity) |
| Alarm Setpoints | Two (2) per channel: Alert (Warning) and Danger (Shutdown). Independently programmable. |
| Outputs | Buffered Sensor Output: Raw signal for analysis. 4-20 mA Output: Proportional to vibration level (configurable per channel). Relay Outputs: For Alert and Danger alarms (handled by the 3500/20 Relay module). |
| Display | Module front panel displays channel status, bar graph of vibration level, and alarm status. |
| Communication | Integrates with the 3500 framework; data is accessible via the 3500/92 Communication Gateway. |
| Power Requirement | Powered by the 3500 rack backplane. The internal 149992-01 PSU module provides isolated power for the monitor circuitry. |
Typical Applications
The 3500/33 module is a cornerstone of machinery protection systems in industries where unplanned downtime is extremely costly or hazardous:
- Power Generation: Gas & Steam Turbines, Generators, Large Boiler Feed Pumps
- Oil & Gas: Centrifugal & Reciprocating Compressors, Gas Turbines, Pumps
- Petrochemicals: Refinery Compressors, Fans, Turbines
- Water & Wastewater: Large Pump Monitoring
- Marine: Main Propulsion Turbines and Gearboxes
- Any critical rotating machinery where continuous vibration monitoring is required for asset protection.
Important Notes & Compatibility
- System Component: This module cannot operate as a standalone device. It must be installed in a Bently Nevada 3500 series rack, which provides power, communication, and relay interfaces.
- Configuration: The module is configured using Bently Nevada’s proprietary System Configuration Software. All parameters (alarm setpoints, filter settings, input type, 4-20 mA scaling) are set digitally.
- Sensor Compatibility: It is crucial to ensure the connected vibration transducers are compatible with the module’s input requirements. Using incorrect sensors will lead to faulty readings.
- Safety Warning: This is a safety-critical protection device. Incorrect configuration, installation, or maintenance can lead to failure to protect machinery, resulting in severe equipment damage and potential safety hazards.
- Qualified Personnel: Only trained and qualified personnel should install, configure, and maintain this system. All work must be performed in accordance with the official Bently Nevada 3500/33 Installation and Configuration Manual.
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