1. Parameter Specifications

• Power Supply: The Bently 3500/20 operates on a dual - redundant 115/230V AC power supply, 50/60Hz. It has a power consumption of around 20 - 30W, ensuring stable energy provision for its operations.
• Input Configuration: It is designed to accept signals from various types of proximity probes. These probes can measure shaft displacement, vibration, and position. The input range is adjustable, typically capable of handling signals corresponding to displacements in the range of millimeters, with high - precision measurement.
• Output Configuration: It provides multiple output options. There are analog outputs that can output signals in the range of 4 - 20mA or 0 - 10V, proportional to the input signals from the probes. Digital outputs are also available, often in the form of relay contacts, which can be used for alarm indication or control actions.
• Measurement Accuracy: The measurement accuracy is very high, with an error typically within ±0.5% of the full - scale value, ensuring reliable and precise data acquisition.

2. Applications

• Rotating Machinery Monitoring: The Bently 3500/20 is widely used for monitoring the condition of rotating machinery such as turbines, generators, compressors, and pumps. It can measure key parameters like shaft vibration, axial position, and eccentricity. By continuously monitoring these parameters, it can detect early signs of mechanical faults, such as imbalance, misalignment, or bearing wear.
• Predictive Maintenance: It plays a crucial role in predictive maintenance strategies. Based on the monitored data, it can predict potential failures in rotating machinery. Maintenance teams can then schedule maintenance activities in advance, reducing unplanned downtime and costly repairs.
• Process Control in Power Plants: In power generation plants, the data provided by the Bently 3500/20 can be used for process control. For example, it can help adjust the operating parameters of turbines to optimize power generation efficiency.

3. Weight and Dimensions

• Weight: The unit weighs approximately 3 kg.
• Dimensions: The overall dimensions are length - 300mm, width - 250mm, height - 150mm. Its size is designed to fit into standard rack - mount enclosures commonly used in industrial control rooms.

4. Features

• High - precision Monitoring: With its high - accuracy measurement capabilities, it can provide detailed and reliable information about the condition of rotating machinery. This is essential for early fault detection and preventing major equipment failures.
• User - friendly Interface: It has an intuitive configuration and monitoring interface. Operators can easily set up measurement parameters, view real - time data, and access historical data for analysis.
• Redundancy and Fault - Tolerance: The dual - redundant power supply and the ability to handle redundant probe inputs enhance its reliability. In case of a power supply failure or probe malfunction, the system can still operate or provide warning signals.

5. Stability and Reliability

• Robust Design: The Bently 3500/20 is housed in a sturdy metal enclosure that provides protection against electromagnetic interference, dust, and moisture. This ensures stable operation in harsh industrial environments.
• Long - term Performance: Bently is a well - established brand known for its high - quality products. The 3500/20 undergoes strict quality control during manufacturing and has a proven track record of long - term reliable performance.
• Comprehensive Diagnostic Capabilities: It has built - in diagnostic functions that can continuously monitor its own operation and the status of connected probes. If a fault is detected, it can quickly report the fault information, facilitating timely maintenance.

6. Real - world Examples

• Power Generation Plant: In a large - scale power generation plant, the Bently 3500/20 is installed on steam turbines. It continuously monitors the shaft vibration and axial position. When the vibration exceeds the preset alarm threshold, it immediately sends an alarm signal to the control room. Operators can then take measures such as adjusting the turbine's operating parameters or scheduling maintenance to prevent serious damage to the turbine.
• Refinery Compressor: In an oil refinery, the device is used to monitor a large - scale compressor. By detecting early signs of bearing wear through vibration analysis, maintenance teams can replace the bearings before they fail completely, ensuring the continuous operation of the refinery's production process.