Bently Nevada|3500/42 125972-02|Proximitor Seismic Monitor

Bently Nevada 3500/42 125972-02 Proximitor Seismic Monitor

Description
A 4-channel monitor for machinery protection, processing inputs from proximity and seismic transducers to measure vibration, position, and acceleration with programmable alarms.

Features

• Supports Radial Vibration, Thrust Position, Differential Expansion, Acceleration, Velocity, and REBAM®
• Channels operate in pairs (max 2 functions simultaneously)
• Front-panel LEDs: OK, TX/RX, Bypass
• Short-circuit protected buffered outputs

Technical Specifications

Inputs

• Channels: 4, accepting proximity/velocity/acceleration signals
• Impedance: 10 kΩ (proximity/acceleration)
• Sensitivity
  • Radial/Thrust/Eccentricity: 3.94 mV/µm or 7.87 mV/µm
  • Differential Expansion: 0.394 mV/µm or 0.787 mV/µm
  • REBAM: 40 mV/µm or 80 mV/µm
  • Acceleration: 10 mV/(m/s²)
  • Velocity: 20 mV/(mm/s) pk (configurable)
• Power Consumption: 7.7W typical

Outputs

• Buffered Outputs: 550 Ω impedance, -24Vdc supply
• Recorder Outputs: 4–20 mA, ±0.25% accuracy (room temp)

Signal Conditioning

• Frequency Response
  • Radial Vibration: 4 Hz–4 kHz (Direct), 0.09 Hz (Gap)
  • Thrust/Expansion: 1.2 Hz (Direct), 0.41 Hz (Gap)
  • Acceleration/Velocity: 10 Hz–30 kHz (unfiltered)
• Accuracy: ±0.33% typical, ±1% maximum for most values

Alarms

• Setpoints: 0–100% of full-scale, ±0.13% accuracy
• Delays
  • Alert: 1–60 sec
  • Danger: 0.1–60 sec

Environmental

• Operating Temperature
  • -30°C to +65°C (standard)
  • 0°C to +65°C (barrier I/O)
• Certifications: ATEX, cNRTLus, EN 61010-1, EMC Directive

Physical

• Dimensions: 241.3 × 24.4 × 241.8 mm (main module)
• Weight: 0.91 kg