Bently Nevada 3500/70M Recip Impulse Velocity Monitor

• Recorder Output: 4 mA to 20 mA, with an accuracy of ±0.05 mA and a maximum load of 600 Ω
• Alarm Setpoint Accuracy: ±0.13% of full-scale
• Alarm Delay: 1 – 60 seconds for alert alarms; 0.1 – 60 seconds for danger alarms
• Frequency Response: 3 – 30000 Hz for impulse/acceleration 2; 1 – 5500 Hz for reciprocating velocity
• Communication Interface: RS – 485
• Transducer Power Supply: Minimum -22 Vdc, maximum 40 mA

Function Features

• Dual – function Configurable Channels: Channels are programmed in pairs, and the module can run up to two functions simultaneously among impulse acceleration, acceleration 2, reciprocating velocity, and low-frequency reciprocating velocity. This design enables the module to meet different vibration monitoring requirements of reciprocating compressors according to on – site needs.
• Precise Alarm Customization: Alert setpoints can be configured for each active static measurement value, and danger setpoints can be set for any two active static values. Once the monitored parameters exceed the set thresholds, the module triggers corresponding alarms promptly to prevent equipment damage due to excessive vibration.
• Stable Signal Processing: It is equipped with advanced signal conditioning circuits, which can effectively process the input signals from transducers and probes. The typical accuracy of signal processing reaches ±0.33%, and the maximum accuracy does not exceed ±1% excluding filters, ensuring the reliability of measurement data.
• Seamless System Integration: With a standard RS – 485 interface, it can be smoothly integrated with existing industrial automation systems. It can also be perfectly combined with other modules of the 3500 series to form a comprehensive machinery protection system, realizing centralized management and analysis of monitoring data.
• Durable and Low – maintenance: It is made of industrial-grade materials that are resistant to corrosion and wear. It can operate for a long time without frequent calibration or adjustment, reducing maintenance costs and downtime for enterprises while ensuring long-term stable performance.

Application Scenarios

• Oil and Gas Industry: It is widely used in reciprocating compressors on offshore drilling platforms, onshore oil and gas gathering stations, and pipeline compression stations. It monitors the vibration of crankcases and crossheads in real time to avoid safety accidents such as oil and gas leakage caused by compressor failures and ensure the continuity of oil and gas extraction and transportation.
• Chemical Processing Industry: It is deployed on reciprocating compressors and reciprocating pumps in chemical plants. These devices are crucial for material mixing and transportation in chemical production. The module monitors their vibration status to prevent production interruptions or dangerous chemical reactions caused by equipment failures due to abnormal vibration.
• Power Generation Industry: It is applied to reciprocating auxiliary equipment in thermal power plants and gas – fired power plants, such as air compressors and feed pumps for boiler systems. By monitoring the vibration parameters of these equipment, it ensures the stable operation of the entire power generation system and avoids power outages caused by auxiliary equipment failures.
• Refrigeration Industry: It is used for vibration monitoring of reciprocating compressors in large refrigeration units. Stable operation of these compressors is essential for maintaining the refrigeration effect. The module promptly detects abnormal vibration to prevent refrigeration system failures and ensure the normal progress of cold chain transportation and industrial refrigeration work.
• General Manufacturing Industry: It is installed on reciprocating machinery in steel, papermaking, and other factories. It monitors the vibration of key components of the machinery, helps maintenance personnel formulate reasonable maintenance plans, extends the service life of the equipment, and reduces economic losses caused by unplanned production downtime.