Bently Nevada 176449-02 3500/42M Proximitor Seismic Monitor

Product Overview

The Bently Nevada 3500/42M Proximitor Seismic Monitor is a four-channel device designed to monitor and protect machinery by analyzing inputs from proximity and seismic transducers. It provides vibration, position, and other critical measurements and compares them against configurable alarm setpoints for protection and monitoring purposes.

Key Features

• Channel Functionality:
  • Monitors radial vibration, REBAM, thrust position, acceleration, differential expansion, shaft absolute position, eccentricity, velocity, and circular acceptance region.
  • Channels are programmed in pairs and can perform up to two functions simultaneously.
• Alarm Settings: User-programmable alert and danger setpoints for active static values.
• Static Value Calculation: Processes input signals to generate measurable parameters (static values).

Specifications

Inputs

• Signal: Accepts 1 to 4 proximity, velocity, or acceleration transducer signals.
• Input Impedance:
  • Standard I/O: 10 kΩ (Proximitor and acceleration inputs).
• Sensitivity:
  • Radial vibration, thrust, eccentricity: 3.94 mV/μm (100 mV/mil) or 7.87 mV/μm (200 mV/mil).
  • Differential expansion: 0.394 mV/μm (10 mV/mil) or 0.787 mV/μm (20 mV/mil).
  • REBAM: 40 mV/μm (1000 mV/mil) or 80 mV/μm (2000 mV/mil).
  • Acceleration: 10 mV/(m/s²) (100 mV/g).
  • Velocity: Multiple sensitivity options: 20 mV/(mm/s) pk, 5.8 mV/(mm/s) pk, or 4 mV/(mm/s) pk.

Outputs

• Front Panel LEDs:
  • OK LED: Indicates proper operation.
  • TX/RX LED: Indicates communication with other modules in the rack.
  • Bypass LED: Indicates the monitor is in Bypass Mode.
• Buffered Transducer Outputs:
  • Short-circuit protected coaxial connector for each channel.
  • Output Impedance: 550 Ω.
• Recorder Outputs:
  • Signal: +4 to +20 mA proportional to full-scale.
  • Voltage Compliance: 0 to +12 Vdc across loads (0 to 600 Ω).
• Shaft Absolute Buffered Outputs:
  • Output Impedance: 300 Ω.

Power

• Power Consumption: 7.7 watts (typical).
• Transducer Power Supply: -24 Vdc.

Performance

• Resolution: 0.3662 µA per bit.
• Error Rates:
  • ±0.25% at room temperature.
  • ±0.7% over the full temperature range.
• Update Rate: Approximately 100 ms or less.