Bently 3300/65-03-01-00-00-00-01 | 3300 Series Dual Probe Monitor – Specifications & Manual

Description

System Architecture & Operational Principle

Upstream Communication

• Proximity Probes: Measure shaft radial vibration or axial position using eddy current technology.
• Velocity Sensors: Measure casing vibration (velocity/acceleration) to detect mechanical faults (e.g., bearing wear, misalignment).

Downstream Communication

• 3300 Series Relay Modules​ (e.g., 3300/32): Trigger alarms or shutdowns if parameters exceed thresholds (e.g., “vibration > 12 mils”).
• External Systems​ (e.g., Emerson DeltaV, Siemens S7-1500): Send real-time data for monitoring or analytics via Modbus TCP/IP or proprietary protocols.

Operational Advantages

• Dual-Probe Flexibility: Combines proximity and velocity signals to provide a comprehensive view of machinery health (e.g., shaft vibration + casing vibration).
• High Precision: Measures shaft displacement with 0.01 mm accuracy, critical for detecting incipient faults (e.g., bearing wear, rotor imbalance).
• Hot-Swappable Design: Can be replaced without shutting down the 3300 system, minimizing downtime during maintenance.

Core Technical Specifications

Attribute​	Specification​
Input Types​	Proximity probe signals (eddy current); velocity sensor signals (seismic)
Number of Channels​	2 independent channels (1 proximity + 1 velocity)
Measurement Parameters​	Relative shaft vibration, absolute casing vibration, shaft position
Accuracy​	±0.5% typical (±1% max) for most parameters
Power Supply​	24 VDC (from 3300 rack)
Operating Temperature​	-30°C to +65°C (-22°F to 149°F)
Storage Temperature​	-40°C to +85°C (-40°F to 185°F)
Dimensions (W×H×D)​	241.3 mm × 24.4 mm × 163.1 mm (9.50 in × 0.96 in × 6.42 in)
Weight​	0.46 kg (1.01 lbs)
Certifications​	CE, CSA, ATEX (hazardous locations)
Compatibility​	3300 Series racks; works with 3300/20 RIM for communication

Bently 149986-01

Customer Value & Operational Benefits

Field Engineer’s Notes (From the Trenches)

When installing the 3300/65-03-01-00-00-00-01, always verify the probe type and gap—the module supports both proximity probes and velocity sensors, but each requires a specific gap setting (e.g., 0.5–1.0 mm for proximity probes). An incorrect gap will cause the module to misinterpret signals, leading to false alarms. I once saw a site where a contractor set the gap too wide, resulting in missed faults and a damaged turbine.

Another gotcha: ground the module properly—the 3300 system’s IP65 rating requires a proper ground connection to protect against electric shock and EMI. I’ve fixed countless “ghost” faults (e.g., random communication drops) by ensuring the module’s ground wire is connected to the cabinet’s earth ground.

If the module’s “FAULT” LED is red, check the probe wiring—loose or reversed wires are a common cause of faults. Use a multimeter to test for continuity between the probe and the module’s input terminals. Also, ensure the probe’s shield is grounded to the 3300 rack’s earth ground to reduce EMI.

Real-World Applications

• Power Generation: Steam Turbine Monitoring​
  A coal-fired power plant uses the 3300/65-03-01-00-00-00-01 to monitor a steam turbine’s shaft vibration (via a proximity probe) and casing vibration (via a velocity sensor). The module transmits data to a 3300/32 relay module, which triggers an emergency shutdown if vibration exceeds the trip threshold (e.g., 12 mils).
• Oil & Gas: Centrifugal Compressor Protection​
  An offshore oil platform uses the 3300/65-03-01-00-00-00-01 to monitor a centrifugal compressor’s shaft position (via a proximity probe) and casing vibration (via a velocity sensor). The module transmits data to a Siemens S7-1500 PLC via Modbus TCP/IP, which adjusts the compressor’s inlet guide vanes to prevent surge events.

  

  Bently 149986-01

High-Frequency Troubleshooting FAQ

• Probe failure (e.g., broken wire, faulty probe).
• Input signal out of range (e.g., too high or too low voltage).
• Module hardware failure (e.g., corrupted firmware, damaged components).
  Check the 3300 Rack Configuration Software for detailed fault codes and follow the manufacturer’s troubleshooting steps.

1. Communication Gateway: Ensure the 3300/92 Communication Gateway is properly configured and connected to the DCS.
2. Protocol Settings: Verify that the DCS is configured for the correct protocol (e.g., Modbus TCP/IP) and that the module’s IP address is correct.
3. Module Status: Check the module’s LED indicators—if the “FAULT” LED is on, resolve the internal fault before proceeding.

Commercial Availability & Pricing