3500/72M 149734-08+135489-01 Recip Rod Position Monitor , China 3500/72M 149734-08+135489-01 Recip Rod Position Monitor Manufacturers, Suppliers, Factory

Overview

Place of Origin:	USA
Brand Name:	Bently Nevada
Model Number:	3500/72M 149734-08+135489-01
Packaging Details:	Original new Factory Sealed
Delivery Time:	5-7 days
Payment Terms:	T/T
Supply Ability:	In stock

Specifications

Product Name	3500/72M 149734-08 + 135489-01
Type	Recip Rod Position Monitor
Dimensions	2.5x18.5x14 cm
Weight	0.96 kg
Rack Space (Monitor)	1 full-height front slot
Rack Space (I/O Modules)	1 full-height rear slot
Operating Temperature (Standard I/O)	-30°C to +65°C
Operating Temperature (Internal Barrier I/O)	0°C to +65°C
Storage Temperature	-40°C to +85°C
Humidity	95% non-condensing
Input Signal	1 to 4 proximity probe signals
Input Impedance	10 kΩ
Nominal Scale Factor (Rod Position)	0.79 mV/µm (20 mV/mil); 3.94 mV/µm (100 mV/mil); 7.87 mV/µm (200 mV/mil)
Nominal Scale Factor (Rod Position 2)	3.94 mV/µm (100 mV/mil); 7.87 mV/µm (200 mV/mil)
Nominal Scale Factor (Rod Drop)	3.94 mV/µm (100 mV/mil); 7.87 mV/µm (200 mV/mil)
Nominal Scale Factor (Hyper Compressor)	3.94 mV/µm (100 mV/mil); 7.87 mV/µm (200 mV/mil)
Power Consumption	7.7 W (nominal)
Front Panel OK LED	Indicates normal operation
Front Panel TX/RX LED	Indicates communication with 3500 modules
Front Panel Bypass LED	Indicates bypass mode active
Signal Conditioning Accuracy (Position/GAP/1X/2X/PK-PK)	±0.33% of full scale typical; ±1% maximum
Signal Conditioning Accuracy (Non-1X Amplitude)	±3.0% of full scale typical
Signal Conditioning Accuracy (Position/Crank Angle)	±1° typical; ±3° maximum
Signal Conditioning Accuracy (Rod Position Angle)	±1° typical; ±3° maximum
Hyper Channel Frequency Response (Peak-Peak Filter)	Fixed 1 Hz to 600 Hz
Hyper Channel Frequency Response (Gap Filter)	-3 dB at 0.09 Hz
Hyper Channel Frequency Response (Non-1X Filter)	Constant Q notch filter; ≥34.9 dB rejection (60 cpm to 15.8× speed)
Hyper Channel Frequency Response (1X Vector Filter)	Constant Q filter; ≥57.7 dB rejection
Hyper Channel Frequency Response (2X Vector Filter)	Constant Q filter; ≥57.7 dB rejection

Description

Bently Nevada's 3500/70M 176449-09+135489-01 Recip Impulse Velocity Monitor is a critical mechanical protection module designed specifically for reciprocating compressors. This component monitors rod drop and crankshaft angle in real time by processing eddy current probe signals, preventing support ring wear and piston damage.

Applications

Oil and gas refineries: Operating in reciprocating compressors in hydrogenation units, real-time monitoring of piston rod drop ("rod drop") prevents major accidents caused by excessive wear of the support rings.

Large fertilizer plants: Used in ultra-high pressure compressors of ammonia synthesis units, employing specialized peak-to-peak filtering algorithms to monitor the mechanical integrity of critical components.

Chemical raw material plants: Managing reciprocating compressor units in ethylene or polyethylene units, optimizing equipment overhaul cycles through correlation analysis of crankshaft angle and position amplitude.

Natural gas storage and transportation stations: Deployed in booster stations along long-distance pipelines, utilizing their wide-temperature operating characteristics to ensure high-precision monitoring of piston rod position under varying climatic conditions.

Steel and steel smelting plants: Monitoring reciprocating air compressors in auxiliary power systems, using multi-channel inputs to achieve centralized protection of all cylinders in the entire unit.

Maintenance and Troubleshooting

Troubleshooting: If the OK LED on the front panel is abnormal, check the 10 kΩ input impedance matching of the I/O module. If the reading fluctuates, verify that the sensor mounting gap is within the linear range and check the cable shielding.

Maintenance Recommendations: Regularly calibrate the scaling factor, especially for the "pole drop" monitoring channel, ensuring the sensor's linear range covers the complete piston rod movement trajectory. When the Bypass LED illuminates, confirm that the system is in manual bypass mode for safe replacement.

FAQ

Q: What is the practical function of “Rod Drop” monitoring in the 3500/72M 149734-08+135489-01 module?
A: It measures piston support ring wear indirectly by detecting rod position drop, providing early warning to prevent cylinder contact.

Q: What does the Bypass LED indicate on the 3500/72M 149734-08+135489-01 front panel?
A: It shows the module is in bypass mode; data is still collected but alarm relay functions are disabled.

Q: Can the 3500/72M 149734-08+135489-01 be used for centrifugal compressor vibration monitoring?
A: No. It is designed for reciprocating machinery; rotating equipment should use 3500/40M or 42M series.

Q: How to configure probe scaling factors for the 3500/72M 149734-08+135489-01?
A: Use 3500 software to match scaling (e.g., 200 mV/mil) with installed Proximitor sensor specifications.

Q: What are the frequency response requirements for the 3500/72M 149734-08+135489-01 in high-pressure compressors?
A: It uses a 1–600 Hz filter range to capture high-frequency pulsations and mechanical impacts.