WhatsApp: +86 16626708626
Email: 3772179818@qq.com
Phone: +86 16626708626Description
BENTLY 3500/72 140734-08 is a four channel pole position monitoring device that is part of the 3500 series mechanical protection system. This modular platform is highly trusted for critical mechanical health management. Its core function is to process signals from proximity sensors and provide accurate dynamic measurements of the rod, including:
Static position: The rod is aligned with the reference of the cylinder.
Dynamic stroke: The peak to peak movement during operation.
Rod drop: Gap change indicates component wear.
Each channel can be configured through the 3500 series rack software to meet specific application requirements, such as ultra-high pressure compressor monitoring or piston engine diagnosis. The module outputs include analog signals for human-machine interface, digital data for SCADA system, and relay contacts for alarm activation (such as warnings for abnormal stroke changes and shutdown of critical rod drop values).
3500/72 140734-08
3500/72 140734-08 can be seamlessly integrated with other 3500 series modules (such as vibration and temperature modules) to form a unified monitoring ecosystem. It complies with API 670 and ISO 10816 standards, ensuring reliability in safety critical applications, and feature enhancements can be achieved through firmware updates using BENTLY’s AMS Suite software.
3500/72 140734-08
Main features and advantages:
Multi functional channel configuration:
Ultra high pressure compressor mode: optimized for high-speed compressors, the pole position measurement accuracy reaches ± 0.1%, and can detect stroke changes of 0.01 millimeters.
Rod drop detection: sensitive to changes as low as 0.05 millimeters, can issue a warning before piston ring or connecting rod wear.
Peak to peak stroke analysis: Use a fixed 1-600 Hz bandpass filter to separate meaningful vibration components from operational noise.
Redundant design: Dual power supplies and isolated channels ensure continuous operation in the event of a channel failure, which is crucial for 24/7 production lines.
Real time diagnosis: Built in self checking function monitors sensor health, cable integrity, and module temperature, reducing mean time to repair (MTTR) by up to 50%.
Scalable integration: Provides 4-20mA analog output and digital data through the 3500 series backplane, supporting integration with predictive analysis tools to predict maintenance needs.
3500/72 140734-08
Technical specifications:
Model 3500/72 140734-08
Brand BENTLY
Type Four Channel Pole Position Monitoring Instrument
System compatibility 3500 series mechanical protection system
Sensor input proximity sensor (such as 3300 XL proximity probe)
Measurement range 0-25 millimeters (0-1 inch)
Sensitivity: 0.79 millivolts/micrometer (20 millivolts/mil), 3.94 millivolts/micrometer (100 millivolts/mil), or 7.87 millivolts/micrometer (200 millivolts/mil)
Filter dynamic stroke fixed 1-600 Hz bandpass filter, average position 0.09 Hz low-pass filter
Power supply 24V DC (10-30V DC range), dual isolated input
Working temperature -40 ° C to 85 ° C
Vibration durability 5g (5-2000Hz, IEC 60068-2-6)
Certified API 670, CE, UL, CSA, IEC 61508 (SIL 2 compatible)
Dimensions: 48.3 millimeters (height) x 177.8 millimeters (width) x 254 millimeters (depth)
Weight 0.9 kilograms
Output 4-20mA analog output for each channel, digital status through backplane, 2 alarm relays
contact us
Phone:+86 16626708626
WeChat/WhatsApp:+86 16626708626
Email: 3772179818@qq.com
3500/72 140734-08
Application areas:
In the field of oil and gas production, reciprocating compressors are responsible for pressurizing natural gas for transportation. 3500/72 140734-08 measures pole position, stroke length, and pole drop through proximity sensors (these are key indicators of compressor cylinder wear). For example, excessive rod drop may indicate piston ring wear, while uneven stroke may indicate alignment issues or bearing failures. By detecting these issues early on, the module can prevent catastrophic failures such as cylinder rupture or crankshaft damage, thereby avoiding production interruptions or safety accidents.
Power generation facilities equipped with reciprocating backup engines also rely on this monitoring instrument. Accurate pole position data can ensure optimal combustion efficiency and reduce mechanical stress. In the manufacturing industry, this module is used for high-speed stamping machines and reciprocating pumps, and even minor rod alignment issues can lead to product defects or equipment downtime. Its sturdy design can withstand vibrations, extreme temperatures, and harsh industrial environments, making it suitable for challenging scenarios such as mining and pulp mills.
3500/72 140734-08
Related products:
BENTLY 3500/22M – Mechanical Protection Module: Provides Keyphasor and Speed Measurement to synchronize pole position data with crankshaft rotation, which is crucial for diagnosing phase related faults.
BENTLY 3500/32- Four channel displacement module: monitors cylinder liner wear or crosshead rail clearance, supplements pole position data for comprehensive compressor health analysis.
BENTLY 3500/92- Communication Gateway Module: Implementing data integration with cloud platforms such as Microsoft Azure, supporting remote monitoring and machine learning based predictive maintenance.
BENTLY 3500/05- Rack Power Supply: Ensuring stable power supply is crucial for maintaining measurement accuracy during voltage fluctuations.
BENTLY 3500/60M – Temperature Monitoring Module: correlates pole position data with bearing or cylinder temperature to identify thermal expansion issues or lubrication faults.
3500/72 140734-08
Installation and maintenance:
Installation instructions and maintenance best practices
Preparation before installation:
Use a precision feeler gauge to install the proximity sensor with a nominal gap of 1-2 millimeters to ensure accurate reference measurement.
Use shielded twisted pair cables to connect sensors and separate them from power cables to reduce electromagnetic interference/radio frequency interference.
During debugging, configure alarm setpoints according to the specifications of the original equipment manufacturer (OEM) of the mechanical equipment (e.g. limit the rod drop of a medium load compressor to 0.2 millimeters).
maintain:
Calibrate quarterly using a stroke simulator to verify the accuracy of sensor to module signals.
Check the looseness or corrosion of the sensor mounting bracket every year, especially in high vibration environments.
Update firmware every six months through BENTLY AMS Suite to access features such as enhanced noise filtering or extended diagnostic menus.
Apply antioxidant to the terminal block every six months in a corrosive environment to maintain signal integrity.
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