Bently 3500/42M

Description

Parameter Specifications

1. Power Supply
   The Bently 3500/42M operates on a dual – redundant 24V DC power supply. This design ensures high – availability in critical applications, with a power consumption of approximately 18 – 22W under normal operating conditions.
2. Input Channels
   It is equipped with 4 input channels specifically designed for proximity probes. These channels can accurately measure shaft displacement, position, and eccentricity. The input range for the proximity probes is typically ±2.54 mm (±0.1 inches), with high – resolution measurement capabilities to detect even the slightest changes in shaft position.
3. Measurement Capabilities
   • Displacement Measurement: The Bently 3500/42M can measure shaft displacement with a high degree of accuracy, typically with an error of less than ±0.5% of the full – scale range. This allows for precise monitoring of shaft movement, which is crucial for detecting misalignment, bearing wear, and other mechanical issues.
   • Frequency Response: It has a wide frequency response range, from DC to several kHz, enabling it to capture both static and dynamic shaft position changes.
4. Communication Interface
   The module supports multiple communication interfaces. It features an Ethernet interface for high – speed data transfer and remote monitoring, allowing for seamless integration with a plant’s network infrastructure. Additionally, it offers a Modbus TCP/RTU interface, facilitating communication with other industrial devices such as PLCs and HMIs.

Uses

1. Industrial Machinery Monitoring
   • In manufacturing plants, the Bently 3500/42M is used to monitor the shaft position and movement of rotating machinery, such as pumps, compressors, and turbines. By continuously monitoring shaft displacement, it can detect early signs of mechanical faults, including misalignment, bearing wear, and shaft rubs.
2. Power Generation
   • In power plants, it is applied to monitor the health of generators and steam turbines. This helps in preventing unexpected breakdowns, reducing maintenance costs, and ensuring the stable and efficient operation of the power generation process.
3. Petrochemical Industry
   • In petrochemical refineries, the Bently 3500/42M is used to monitor the shaft position of equipment like centrifugal pumps and agitators. Real – time monitoring of shaft displacement enables timely maintenance and reduces the risk of production interruptions.

Weight and Dimensions

1. Weight
   The Bently 3500/42M weighs approximately 3 – 4 kg, which is relatively lightweight considering its functionality and the robust construction required for industrial applications.
2. Dimensions
   It has a compact design with dimensions around 210mm (width) x 320mm (depth) x 140mm (height). This allows it to be easily installed in standard control cabinets or on equipment racks.

Characteristics

1. High – Precision Measurement
   • The Bently 3500/42M provides high – precision measurement of shaft displacement, ensuring reliable and accurate monitoring of machinery conditions.
2. Flexible Configuration
   • It offers flexible configuration options, allowing users to customize the measurement parameters, alarm settings, and communication protocols according to specific application requirements.
3. Advanced Diagnostic Functions
   • The device is equipped with advanced diagnostic functions, such as trend analysis and fault classification. These functions help operators quickly identify the root cause of problems and take appropriate corrective actions.

Stability and Reliability

1. Robust Design
   • The Bently 3500/42M has a robust mechanical and electrical design, capable of withstanding harsh industrial environments, including high levels of vibration, dust, and temperature variations.
2. Redundancy and Self – Diagnosis
   • The redundant power supply and built – in self – diagnosis functions enhance the reliability of the device. It can detect and report internal faults, and continue to operate normally in case of a single – point failure.
3. Long – Term Testing
   • The Bently 3500/42M has undergone extensive long – term testing under various industrial conditions to ensure its stability and reliability over a long service life.

Actual Cases

1. Turbine Monitoring in a Power Plant
   • In a large – scale power plant, the Bently 3500/42M was installed to monitor a steam turbine. It detected a gradual increase in shaft displacement, indicating early – stage misalignment. Thanks to the early detection, the maintenance team was able to adjust the turbine’s alignment before a major breakdown occurred, minimizing downtime and saving significant repair costs.
2. Pump Monitoring in a Petrochemical Refinery
   • In a petrochemical refinery, the Bently 3500/42M was used to monitor a centrifugal pump. It detected an abnormal change in shaft position, which was caused by a worn bearing. The early warning allowed the operators to replace the bearing promptly, preventing damage to the pump and ensuring the continuous operation of the production process.