Bently Nevada 140734-03 4-Ch Vibration Monitor

Bently Nevada 140734-03 Vibration Monitor for 3500 Series

The Bently Nevada 140734-03 is a high-performance vibration monitor designed for 3500 Series monitoring systems. It provides continuous vibration surveillance for critical rotating machinery including turbines, compressors, and pumps. This monitor delivers accurate vibration data with advanced signal processing for predictive maintenance applications.

Technical Specifications

• Part Number: 140734-03
• Model: 3500 Series Vibration Monitor
• Manufacturer: Bently Nevada
• Input Channels: 4 independent vibration input channels
• Transducer Types: Proximity probes, velocity sensors, accelerometers
• Transducer Power: -24 Vdc at 40 mA per channel, regulated
• Input Impedance: 100 kΩ ±1% per channel
• Maximum Input Signal: 20 V peak-to-peak
• Dynamic Range: 90 dB typical

Frequency Response Characteristics

• Frequency Range: 0.5 Hz to 10,000 Hz (30 to 600,000 RPM)
• Amplitude Flatness: ±0.5 dB from 2 Hz to 5,000 Hz
• Phase Linearity: ±2° from 5 Hz to 1,000 Hz
• Low Frequency Cutoff: Selectable 0.5 Hz, 1 Hz, 5 Hz, 10 Hz
• High Frequency Cutoff: Selectable 100 Hz, 500 Hz, 1 kHz, 5 kHz, 10 kHz
• Integration: Single and double integration available

Measurement Ranges & Accuracy

• Displacement Range: 0 to 1000 μm (0 to 40 mils) peak-to-peak
• Velocity Range: 0 to 200 mm/s (0 to 8 in/s) peak
• Acceleration Range: 0 to 50 g peak
• Resolution: 16-bit ADC, 0.001 μm displacement
• Accuracy: ±1% of full scale at reference frequency
• Linearity Error: <0.1% of full scale
• Cross-talk Rejection: >80 dB between channels

Filter Specifications

• Programmable High-pass Filters: 0.5 Hz to 100 Hz, 4th order Butterworth
• Programmable Low-pass Filters: 100 Hz to 10 kHz, 4th order Butterworth
• Band-pass Filters: Tunable from 1 Hz to 9 kHz, Q from 1 to 50
• Tracking Filter: Phase-locked loop, ±0.1% of RPM tracking accuracy
• Filter Attenuation: -24 dB/octave beyond cutoff

Output Signals

• Buffered Transducer Outputs: 4 outputs, -2 Vdc to -22 Vdc, 10 mA max each
• Recorder Outputs: 4 to 20 mA, 0 to 10 Vdc, 0 to 5 Vdc selectable
• Recorder Output Accuracy: ±0.25% of full scale
• Recorder Output Load: 0 to 600 Ω for current, >10 kΩ for voltage
• Alarm Relays: 4 Form C relays, 250 VAC/5A, 30 VDC/5A
• Alarm Response Time: <20 ms from fault detection

Alarm & Protection Features

• Alarm Setpoints: 4 per channel, fully programmable
• Alarm Deadband: 0 to 25% of setpoint, programmable
• Alarm Delay: 0 to 60 seconds, programmable
• Voting Logic: 1-out-of-1, 2-out-of-2, 2-out-of-3, 3-out-of-4
• Risk Level: Danger, Alert, and Transducer Fault indication
• Latching/Non-latching: Programmable per alarm

Power Requirements

• Supply Voltage: +24 Vdc and -24 Vdc from 3500 rack backplane
• Power Consumption: 12 watts typical, 15 watts maximum
• Isolation: 1500 Vrms channel-to-channel and channel-to-ground
• Ripple Rejection: >60 dB at 100 Hz and 120 Hz
• Brownout Protection: Maintains operation down to 18 Vdc for 50 ms

Environmental Specifications

• Operating Temperature: -30°C to +65°C (-22°F to +149°F)
• Storage Temperature: -40°C to +85°C (-40°F to +185°F)
• Temperature Coefficient: ±0.02% per °C of full scale
• Relative Humidity: 0 to 95% non-condensing (IEC 60068-2-78)
• Vibration Endurance: 5 g peak, 10 Hz to 500 Hz (IEC 60068-2-6)
• Shock Endurance: 30 g peak, 11 ms half-sine (IEC 60068-2-27)

EMC & Safety Compliance

• EMC Emissions: EN 61000-6-4, Class A
• EMC Immunity: EN 61000-6-2, industrial environment
• ESD Immunity: ±8 kV contact, ±15 kV air (IEC 61000-4-2)
• Radiated RF Immunity: 10 V/m, 80 MHz to 2.7 GHz (IEC 61000-4-3)
• Electrical Fast Transient: ±2 kV (IEC 61000-4-4)
• Surge Immunity: ±1 kV line-to-line, ±2 kV line-to-ground (IEC 61000-4-5)
• Safety Certification: UL 61010-1, CSA C22.2 No. 61010-1, EN 61010-1

Physical Characteristics

• Form Factor: Full-height 3500 series module
• Height: 160 mm (6.30 in)
• Width: 30 mm (1.18 in)
• Depth: 210 mm (8.27 in) including backplane connector
• Weight: 0.85 kg (1.87 lb)
• Front Panel: Anodized aluminum with silk-screened labeling
• Connectors: Gold-plated, 96-pin DIN 41612 backplane connector

Diagnostic & Communication Features

• Self-diagnostics: Continuous monitoring of internal circuits
• Transducer Fault Detection: Open circuit, short circuit detection
• Communication Protocol: Modbus RTU via 3500 rack communication module
• Data Storage: 30 day trend data retention at 15 minute intervals
• Firmware Update: Field upgradeable via 3500 rack interface
• LED Indicators: Power, channel status, alarm status per channel

FAQ

• How many channels does the 140734-03 have?
  It provides 4 independent vibration input channels in one module.
• What is the frequency response range?
  0.5 Hz to 10,000 Hz covering 30 to 600,000 RPM.
• What transducer types are supported?
  Proximity probes, velocity sensors, and accelerometers with -24V excitation.
• What is the measurement accuracy?
  ±1% of full scale at reference frequency with 16-bit resolution.
• Does it provide transducer power?
  Yes, regulated -24 Vdc at 40 mA per channel.
• What output signals are available?
  Buffered transducer outputs and programmable 4-20 mA/0-10 Vdc recorder outputs.