Description
Bently Nevada 9200-01-05-01-00
Technical Specifications:
| Parameter | Specification |
|---|---|
| Manufacturer | Bently Nevada |
| Series | 9200 Series |
| Product Type | Two-Wire Velocity Seismoprobe Transducer |
| Mounting Angle | 0 ±2.5 degrees |
| Minimum Operating Frequency | 4.5 Hz (270 cpm) |
| Connector/Cable Option | Terminal block top mount (no cable) |
| Mounting Base | Circular with 1/4-20 UNC stud |
| Agency Approval | No approvals required |
| Sensitivity | 20 mV/mm/s (500 mV/in/s), ±5% when properly terminated and oriented at calibration angle |
| Calibration Load | 10 kΩ between Terminal A and Terminal B |
| Sensitivity Temperature Coefficient | 0.2% per degree Celsius |
| Frequency Response | 4.5 to 1000 Hz (270 to 60,000 cpm), +0, -3 dB typical |
| Dynamic Operating Range | 2.54 mm (0.100 in) peak-to-peak maximum displacement |
| Velocity Range | 25 mm/s (1 in/s) at +22°C with 10 kΩ load at 100 Hz |
| Coil Resistance | 1.25 kΩ ±5% |
| Locked Coil Inductance | 125 mH typical |
| Amplitude Linearity | ±5% from 0.01 to 5.0 in/s (0.254 to 127 mm/s) at 100 Hz |
| Shock Resistance | Withstands 50 g peak maximum acceleration along non-sensitive axis |
| Transverse Sensitivity | ±10% maximum at 100 Hz and 1.0 in/s |
| Output Signal Polarity | Pin A goes positive with respect to Pin B when transducer case velocity is towards connector |
| Maximum Lead Wire Length | 305 meters (1,000 feet) maximum between transducer and monitor |
Functional Features: The transducer employs moving-coil technology that provides inherent immunity to impact and impulsive excitation compared to solid-state velocity transducers. It requires no external power supply, generating its own electrical signal proportional to vibration velocity. This self-powered design makes it particularly convenient for portable measurement applications. The two-wire system simplifies installation and reduces wiring costs compared to traditional multi-wire sensor configurations.
Structural Characteristics: The transducer features a rugged housing constructed from anodized aluminum with a neoprene gasket for environmental sealing. The typical height is 102 mm (4 inches) with a diameter of 41 mm (1.6 inches). The circular mounting base includes a 1/4-20 UNC threaded stud for secure attachment to machine surfaces. The terminal block top mount connector provides reliable, screw-type electrical connections. The overall design is dust and moisture resistant with excellent corrosion resistance.
Working Principle: The transducer operates on the moving-coil electromagnetic principle. A coil of wire suspended in a magnetic field moves relative to the magnet when the transducer case vibrates. This relative motion induces a voltage in the coil proportional to the velocity of vibration. The output signal is taken across the two terminals and connected to the monitoring system. The sensor measures absolute motion relative to free space, making it ideal for bearing housing and structural vibration measurements.
Installation Requirements: Mount the transducer on a flat, clean machine surface using the integral 1/4-20 UNC stud. Ensure the mounting surface is perpendicular to the desired measurement axis within ±2.5 degrees. Apply appropriate torque to secure the transducer without over-tightening. Use shielded twisted-pair cable for connection to the monitoring system. Maintain the specified maximum cable length between the transducer and the monitoring equipment. The terminal block connections must be tight and free from corrosion.
Application Scenarios: Bearing housing vibration monitoring on pumps, motors, and generators, casing vibration measurement on steam turbines and gas turbines, structural vibration monitoring on compressors and fans, gearbox housing vibration detection, and general machinery condition monitoring in power plants, refineries, chemical plants, and manufacturing facilities.
Usage Considerations: Do not exceed the specified dynamic operating range to prevent mechanical damage. Ensure proper orientation during installation to maintain specified sensitivity. The transducer is designed for operation in environments with temperatures ranging from -29°C to +121°C. Avoid installation in areas subject to continuous submersion in liquids. Verify proper polarity when connecting to the monitoring system. Periodic verification of mounting tightness is recommended to ensure measurement accuracy.
