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BENTLY 125840-01 A Vibration Monitoring Module in the 3500 Series Monitoring System

BENTLY 125840-01 A Vibration Monitoring Module in the 3500 Series Monitoring System photo-1
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Material:
Other, Global universal model
Condition:
Other, Global universal model
Task:
Other, Global universal model
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China
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Delivery time depends on order quantity.
Material Other, Global universal model
Condition Other, Global universal model
Task Other, Global universal model
Mathematical Model Other, Global universal model
Signal Other, Global universal model
Customized Non-Customized
Structure Other, Global universal model
Operating temperature -40℃~+85℃
Humidity 5%~95% (non-condensing)

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125840-01 is a vibration monitoring module in the Bently Nevada 3500 series monitoring system, primarily designed to collect and analyze vibration signals from rotating machinery, providing critical data support for equipment condition assessment and fault diagnosis. The following is a compilation of relevant content from its user manual:
Product Overview
As a core monitoring component of the 3500 system, this module can connect to accelerometers, velocity sensors, or displacement sensors to real-time monitor parameters such as radial vibration, axial vibration, and bearing vibration of equipment. Through built-in signal conditioning circuits and digital processing units, it converts raw vibration signals into quantifiable vibration values (e.g., peak-to-peak, RMS) and compares them with preset thresholds to trigger abnormal alarms. Its high sampling rate and wide frequency response range enable it to capture various signals from low-frequency vibrations to high-frequency impacts, making it suitable for condition monitoring of critical rotating equipment such as steam turbines, fans, and pumps.
Technical Parameters
  • Power Supply: 24V DC input, typical power consumption ≤ 3.5W.

  • Channel Configuration: 4 independent vibration input channels, supporting single-ended or differential input.

  • Sensor Compatibility:

    • Accelerometers: Sensitivity 10mV/g to 100mV/g, measurement range ±50g (peak-to-peak);

    • Velocity sensors: Sensitivity 10mV/mm/s to 100mV/mm/s, measurement range 0-200mm/s (RMS);

    • Displacement sensors (eddy current): Compatible with Bently 3300 series probes, measurement range ±2mm (peak-to-peak).

  • Frequency Response: 0.1Hz to 10kHz (-3dB), with selectable filtering bands via software.

  • Sampling Rate: 25.6kHz per channel, supporting continuous sampling and trigger sampling (e.g., triggered by excessive vibration).

  • Measurement Accuracy: ±1% full scale (at 25°C), resolution 0.001mm/s (velocity) or 0.01μm (displacement).

  • Isolation Performance: Optoelectronic isolation between channels and between channels and backplane, isolation voltage 2500V AC (1 minute), common-mode rejection ratio ≥100dB.


125840-01 15小卡老款 (3) 

 

    • Operating Environment:

      • Operating temperature: -40°C to 70°C;

      • Storage temperature: -50°C to 85°C;

      • Relative humidity: 5% to 95% (non-condensing);

      • Vibration resistance: 5g (10Hz-2000Hz);

      • Shock resistance: 25g (11ms half-sine wave).

    • Mechanical Specifications: Approximately 100mm × 150mm × 35mm (half-height module), weight about 0.35kg.

Functional Features
  • Multi-Parameter Monitoring: A single channel can simultaneously calculate characteristic parameters such as vibration peak-to-peak, RMS, peak, and kurtosis, meeting different fault diagnosis needs (e.g., kurtosis for early impact fault detection).

  • Spectral Analysis Function: Built-in Fast Fourier Transform (FFT) module, capable of generating real-time vibration spectra (0-5kHz) to identify characteristic frequencies such as rotational frequency and harmonic frequency, assisting in judging fault types like unbalance and misalignment.

  • Programmable Alarm Logic: Each channel supports two-level alarms (warning, danger) with thresholds configurable via software. Alarm triggering can link to relay outputs (requires modules like 3500/33).

  • Data Recording and Playback: Supports continuous recording of vibration trend data (sampling interval adjustable from 1-60 seconds) and can store vibration waveforms at the trigger moment (e.g., 1 second before to 3 seconds after exceeding the threshold) for post-analysis.

  • Synchronized Acquisition: Synchronizes with keyphasor modules (e.g., 125800-01) in the 3500 system to achieve phase correlation between vibration signals and rotational speed, supporting order analysis and shaft centerline trajectory plotting.

Installation and Wiring
  • Installation Position: As a half-height module of the 3500 system, it is installed in slots 3-14 of the full-size rack or slots 3-7 of the mini rack, requiring communication with the 3500/20 RIM module.

  • Wiring Method:

    • Sensor Input: Connect sensors via rear terminals. For differential input, distinguish between positive and negative poles, with the shield layer grounded at a single point;

    • Synchronization Signal Input: Connect synchronization pulses output by the keyphasor module for phase reference;

    • Analog Output: 4-20mA signals (corresponding to vibration values) connect to DCS or recorders, with impedance ≤500Ω.





125840-01 15小卡老款 (5)    





 

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Product Tags: 125840-01 , BENTLY , A vibration monitoring module in the 3500 series monitoring system

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1Yr
Business Type
Trading Company
Year Established
2014
Factory Size
1,000-3,000 square meters
Product Certifications
SA8000