WhatsApp: +86 16626708626
Email: 3772179818@qq.com
Phone: +86 16626708626Description
The Bentley 3500/72M is a four channel piston rod position monitor and an important component of the Bentley 3500 series, which is a widely recognized modular system for mechanical equipment protection and monitoring. Its main function is to receive input from proximity sensors, condition the input signal, and then perform detailed dynamic and static position measurements.
3500/72M
After signal conditioning, the 3500/72Mwill compare these processed signals with user programmable alarm values. This allows for highly customized mechanical equipment protection methods, as operators can set specific restrictions based on equipment requirements. Each channel of the monitor can be programmed using 3500 rack configuration software to perform different functions. For example, it can be configured for measuring ultra-high pressure compressors, tracking piston rod positions, or detecting piston rod drops. This flexibility makes it suitable for various reciprocating mechanical applications, whether it is small industrial installations or large, high-yield production facilities.
3500/72M
Main features and advantages:
Multi channel design: The3500/72M is equipped with four channels, which can simultaneously monitor multiple points on reciprocating machinery. This is very beneficial because it can comprehensively understand the position of the piston rod and better detect any asymmetry or imbalance phenomena in the system. For example, if one channel detects an abnormal piston rod position while the other channels are normal, it may be a local problem, such as bearing damage or connecting rod misalignment.
Input compatibility: This monitor is designed to work seamlessly with proximity sensors. These sensors are known for their high precision in measuring the distance between the piston rod and a fixed reference point. The ability of 3500/72M to interface with such sensors ensures reliable and accurate position measurement even in challenging industrial environments with high vibration, temperature changes, and electrical interference.
Signal conditioning capability: The monitor has advanced signal conditioning algorithms. It can filter out noise and interference from the raw signal received by the sensor, ensuring that the measured value accurately reflects the actual position of the piston rod. For example, it has a peak to peak filter with a fixed range of 1Hz to 600Hz, which can be used to analyze the dynamic motion of the piston rod. In addition, it can also calculate the average position of the piston within the same frequency range, providing valuable insights into the overall operation of reciprocating mechanisms.
User programmable alarm: Operators can flexibly set alarm thresholds based on the specific operating conditions of the mechanical equipment. This means they can define warning and danger levels for piston rod position, piston rod drop, or other measurement parameters. When the monitoring value exceeds the set threshold, the monitor will trigger an alarm and notify the operator in a timely manner. This feature is crucial for preventing equipment damage and ensuring safe operation.
Configuration flexibility: Using 3500 rack configuration software, each channel can be programmed to perform different functions. This adaptability enables the3500/72Mto be customized according to the different requirements of various reciprocating compressor models and applications. For example, in some compressors, the focus may be on monitoring piston rod drops to prevent catastrophic failures, while in other compressors, accurately tracking piston rod position for optimal performance may be the primary task.
3500/72M
Technical specifications:
Model 3500/72M
Brand Bentley
Type Four Channel Piston Rod Position Monitor
System compatibility Bentley 3500 series
Input sensor proximity sensor
Input impedance 10 k Ω
Piston rod position sensitivity 0.79 mV/µ m (20 mV/mil), 3.94 mV/µ m (100 mV/mil), or 7.87 mV/µ m (200 mV/mil)
Piston rod position 2 sensitivity 3.94 mV/µ m (100 mV/mil) or 7.87 mV/µ m (200 mV/mil)
Piston rod drop sensitivity 3.94 mV/µ m (100 mV/mil) or 7.87 mV/µ m (200 mV/mil)
Sensitivity of ultra-high pressure compressor 3.94 mV/µ m (100 mV/mil) or 7.87 mV/µ m (200 mV/mil)
The peak to peak filter has a fixed range of 1Hz to 600Hz
The range of the piston average position filter is fixed from 1Hz to 600Hz
Average gap -3dB frequency 0.09 Hz
Power consumption nominal 7.7 watts
Compact size design, suitable for installation in 3500 series racks, typically measuring 48.3 millimeters (height) x 177.8 millimeters (width) x 254 millimeters (depth) (similar in size to other 3500 series modules for efficient space installation)
Weight approximately 0.9 kilograms (lightweight, easy to handle during installation and maintenance)
Contact Us
Phone:+86 16626708626
WeChat/WhatsApp:+86 16626708626
Email: 3772179818@qq.com
3500/72M
Application areas:
In the oil and gas industry, reciprocating compressors are the main equipment for gas pressurization, used in gas extraction, transportation, and processing processes.3500/72M continuously monitors the position of the compressor piston rod through proximity sensors. It can accurately track the dynamic and static positions of the piston rod, detecting even the slightest misalignment or wear. For example, if the piston rod deviates from the predetermined path due to bearing wear, the monitor will capture the position change. This early detection enables maintenance teams to schedule repairs during planned downtime, preventing catastrophic failures and avoiding production losses, safety hazards, and high equipment replacement costs.
The use of reciprocating engines as backup power sources or power plants in certain special applications also relies on 3500/72M. These engines require high-precision operation to ensure stable power supply. The piston rod position monitor helps maintain optimal engine performance by providing real-time data on piston rod movement. In manufacturing plants, especially those involving high-pressure gas or chemical production, reciprocating compressors are used in the production process. 3500/72M ensures that these compressors operate within safe and efficient parameter ranges, helping to improve the overall quality and consistency of the manufacturing process.
Related products:
Bentley 3500/22M – Mechanical Equipment Protection Module: This module can work in conjunction with the 3500/72M to provide additional monitoring functions such as Keyphasor and speed measurement. In reciprocating compressors, crankshaft speed and key phasor information can be associated with the piston rod position monitored by 3500/72M. For example, sudden changes in the position of the piston rod may be related to changes in the compressor speed, and having both types of data can help diagnose equipment problems more accurately.
Bentley 3500/32- Four Channel Displacement Module: In some reciprocating mechanical devices, this module can complement the 3500/72M. Although the 3500/72M focuses on the position of the piston rod, the 3500/32 can monitor the displacement of other components such as the compressor cylinder or crosshead. By integrating data from two modules, a more comprehensive understanding of the mechanical behavior of reciprocating systems can be obtained, which is very useful for predicting component wear and potential failures.
Bentley 3500/92- Communication Gateway Module: It enables the 3500/72M to communicate with enterprise level systems, cloud platforms, or other industrial networks. This is crucial for remote monitoring, data recording, and analysis. For example, the piston rod position data collected by 3500/72M can be sent to the central control room through a communication gateway module, where operators can analyze long-term trends and make informed decisions on maintenance and equipment performance optimization.
Bentley 3500/05- Rack Power Supply: Ensuring stable power supply to the 3500 series rack is crucial for the normal operation of the 3500/72M and other modules in the system. A reliable power supply is crucial as any voltage fluctuations or interruptions can affect the accuracy of piston rod position measurements and the overall performance of the monitoring device.
Bentley 3500/60M – Temperature Monitoring Module: In reciprocating compressors, there may be a correlation between temperature and piston rod position. For example, overheating may cause thermal expansion, which in turn affects the position of the piston rod. 3500/60M can be used in combination with 3500/72M to gain a more comprehensive understanding of the operating conditions of the equipment. By analyzing temperature and piston rod position data, operators can detect potential issues, such as overheating bearings that may cause abnormal movement of the piston rod.
Installation and maintenance:
Precautions before installation:
When installing proximity sensors connected to 3500/72M, it is essential to ensure precise installation according to the manufacturer’s guidelines. The distance between the sensor and the target (piston rod) should be accurately set to obtain reliable position measurement. Improper installation may result in inaccurate readings, false alarms, or inability to detect actual changes in piston rod position.
Connect the sensor and 3500/72Mmonitor using shielded cables. This helps reduce electromagnetic interference (EMI) and radio frequency interference (RFI), which may distort the signal. Cables should also be routed away from high-voltage power lines and other electrical noise sources.
Check the compatibility between the 3500/72M and other modules in the 3500 series rack. Ensure that the rack has sufficient space and power capacity to accommodate the monitor, and that all modules are properly configured for communication.
Maintain best practices:
Regularly calibrate and inspect proximity sensors and 3500/72M monitoring instruments. Calibration should be performed at least once a year using calibrated reference standards, and more frequently in high stress or critical applications. This ensures that the position measurement remains accurate over a long period of time.
Check for signs of wear, corrosion, or looseness in cables and connectors. In industrial environments, cables may be exposed to harsh conditions, and damaged or loose connections may result in intermittent signal loss or inaccurate readings. Immediately replace any damaged cables or connectors.
Update the firmware of the 3500/72M monitor according to Bentley’s suggestion. Firmware updates typically include error fixes, performance improvements, and new features. Regularly check Bentley’s website or use its dedicated software update tools to understand available updates.
Consider installing additional protective enclosures or filters for 3500/72M and related components in environments with high levels of dust, humidity, or corrosive substances. This helps to extend the lifespan of the device and maintain its performance.
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