Bently Nevada 177230-02-01-05 Seismic Transmitter

High-Performance Velocity Sensing for Critical Rotating Equipment

The Bently Nevada 177230-02-01-05 seismic transmitter delivers a robust 4-20 mA output proportional to casing vibration velocity. This two-wire loop-powered device measures 89 mm in height and 45 mm in diameter, with a total weight of approximately 320 grams. The transmitter accepts a 10-30 Vdc supply voltage and provides a standard industrial current loop output for straightforward integration. Its 316L stainless steel housing protects internal components from moisture and chemical exposure in demanding environments. This unit mounts securely on bearing housings, turbine frames, and pump casings for continuous vibration surveillance.

Dynamic Range and Frequency Characteristics

This seismic transmitter covers a velocity measurement range of 0-25 mm/s peak, with a frequency response from 10 Hz to 1 kHz. The device maintains an accuracy of ±5% of full scale at 80 Hz, ensuring reliable vibration data for condition assessment. Its internal moving coil and permanent magnet assembly generates a voltage signal proportional to casing motion. The transmitter operates reliably across temperatures from -30°C to +100°C, accommodating both indoor and outdoor installations. These specifications enable operators to detect unbalance, bearing deterioration, and looseness in rotating machinery.

Detailed Technical Specifications

Connectivity and Wiring Configuration

This transmitter features a two-wire terminal block that accepts standard 16-22 AWG shielded cable for signal transmission. The housing includes a 1/4-28 UNF mounting stud for direct attachment to machine surfaces or through optional adapter flanges. Operators can extend the loop wiring up to 300 meters while maintaining signal integrity and accuracy. The unit draws a maximum loop current of 25 mA and stores minimal internal energy for intrinsic safety compliance. Users can connect this transmitter directly to the Bently Nevada 3500 Monitoring System or any PLC analog input card with 4-20 mA capability.

Operational Benefits and Maintenance Practices

This seismic transmitter serves as a cost-effective solution for continuous vibration protection in process industries. The stainless steel construction withstands washdowns, humidity, and corrosive atmospheres without performance degradation. Regular inspection of the mounting bolt torque will maintain optimal mechanical coupling for accurate measurements. Operators can verify loop output using a standard mA meter without disrupting the running process. The transmitter requires no scheduled recalibration, though users should periodically check cable integrity and connector tightness. This robust device simplifies vibration monitoring implementation while delivering dependable machinery protection data.