Bently Nevada 140734-02 3500/42M Proximitor®/Seismic Monitor

Description:

The Bently Nevada 140734-02 3500/42M Proximitor®/Seismic Monitor is a 4-channel monitor designed to accept input from proximity and seismic transducers. It conditions these signals to provide various vibration and position measurements, and compares the conditioned signals with user-programmable alarms. Each of the monitor's channels can be programmed using the 3500 Rack Configuration Software to perform multiple functions such as Radial Vibration, Thrust Position, Differential Expansion, Eccentricity, REBAM®, Acceleration, Velocity, Shaft Absolute, and Circular Acceptance Region. Channels are programmed in pairs, allowing them to perform up to two functions simultaneously.

The primary purpose of the 3500/42M monitor includes:

1. Machinery protection by continuously comparing monitored parameters against configured alarm setpoints.
2. Providing essential machine information for both operations and maintenance personnel.

Technical Specifications:

Inputs:

• Signal: Accepts 1 to 4 proximity, velocity, or acceleration transducer signals.
• Input Impedance:
  • Standard I/O: 10 kΩ (Proximitor® and Acceleration Inputs).
  • TMR I/O: Effective impedance of 50 kΩ with three Bussed TMR I/O channels wired in parallel to one transducer.

Power Consumption:

• 7.7 Watts, typical.

Sensitivity:

• Radial Vibration, Thrust, Eccentricity, Shaft Absolute, Direct:
  • 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 and Acceleration2:
  • 10 mV/(m/s²) (100 mV/g).
• Velocity and Velocity2:
  • 20 mV/(mm/s) pk (500 mV/(in/s) pk), 5.8 mV/(mm/s) pk (145 mV/(in/s) pk), or 4 mV/(mm/s) pk (100 mV/(in/s) pk).

Outputs:

• Front Panel LEDs:
  • OK LED: Indicates proper operation.
  • TX/RX LED: Indicates communication with other modules in the 3500 rack.
  • Bypass LED: Indicates Bypass Mode.
• Buffered Transducer Outputs:
  • One coaxial connector for each channel, short-circuit protected.
  • Output Impedance: 550 Ω
  • Transducer Power Supply: -24 Vdc
• Recorder:
  • +4 to +20 mA, values proportional to monitor full-scale, individual recorder values for each channel.
  • Voltage Compliance (current output): 0 to +12 Vdc range across load, load resistance 0 to 600 Ω.
• Resolution:
  • 0.3662 µA per bit, ±0.25% error at room temperature, ±0.7% error over temperature range.
  • Update rate 100 ms or less.

Signal Conditioning:

• Radial Vibration Frequency Response:
  • Direct filter: User-programmable, 4 Hz to 4000 Hz or 1 Hz to 600 Hz.
  • Gap filter: -3 dB at 0.09 Hz.
  • Not 1X filter: 60 cpm to 15.8 times running speed.
  • 1X and 2X Vector filter: Valid for machine speeds of 60 cpm to 60,000 cpm.
• Accuracy:
  • Direct and Gap: ±0.33% of full-scale typical, ±1% maximum.
  • 1X and 2X: ±0.33% of full-scale typical, ±1% maximum.
  • Smax: ±5% maximum.
  • Not 1X: ±3% for machine speeds less than 30,000 cpm, ±8.5% for speeds greater than 30,000 cpm.

Thrust and Differential Expansion Frequency Response:

• Direct filter: -3 dB at 1.2 Hz.
• Gap filter: -3 dB at 0.41 Hz.
• Accuracy: ±0.33% of full-scale typical, ±1% maximum.

Acceleration Frequency Response:

• Without Filter: RMS 10 to 30,000 Hz, Peak 3 to 30,000 Hz.
• With Integration: RMS 10 to 9,155 Hz, Peak 10 to 9,155 Hz.
• Filter Quality: 4-pole (80 dB per decade, 24 dB per octave).
• Accuracy: ±0.33% of full-scale typical, ±1% maximum.

Velocity and Velocity II Frequency Response:

• RMS: 10 to 5,500 Hz, -3 dB.
• Peak or Peak-to-Peak: 3 to 5,500 Hz, -3 dB.
• Filter Quality: High-Pass 2-pole, Low-Pass 4-pole.
• Accuracy: ±0.33% of full-scale typical, ±1% maximum.

Alarms:

• User-set Alert and Danger setpoints adjustable from 0 to 100% of full-scale.
• Alarm Time Delays programmable from 1 to 60 seconds for Alerts and 0.1 to 60 seconds for Danger.

Static Values:

• Radial Vibration: Direct, Gap, 1X Amplitude, 1X Phase Lag, 2X Amplitude, 2X Phase Lag, Not 1X Amplitude, Smax Amplitude.
• Thrust Position: Direct, Gap.
• Differential Expansion: Direct, Gap.
• Eccentricity: Peak-to-peak, Gap, Direct Minimum, Direct Maximum.
• REBAM®: Spike, Element, Rotor, Direct, Gap, 1X Amplitude, 1X Phase Lag.
• Acceleration: Direct (RMS or peak Acceleration, RMS or peak Velocity, Band-pass peak Acceleration, Band-pass peak Velocity).