Bently Nevada 86739-01 3500/16 Dual Vibration Monitor

The 86739-01 3500/16 dual vibration monitor from Bently Nevada measures shaft vibration inside steam and gas turbine protection systems. Plant engineers install this monitor whenever rotor health demands continuous, precise surveillance across two channels. Consequently, it protects bearings and seals by catching abnormal vibration early.

Key Technical Specifications

The table below outlines the main physical and electrical parameters of the 86739-01 3500/16 monitor.

Parameter	Specification
Product Type	Dual Vibration Monitor
Compatibility	Bently Nevada 3500 series systems
Dimensions	Approximately 254 mm x 127 mm x 51 mm
Weight	Approximately 1.1 kg (2.4 lbs)
Mounting	Rack frame or panel mounting base
Interface	Backplane bus and transducer input terminals
Connectors	Multi-pin connector and terminal blocks
Component Count	Multiple signal processors, drivers, and logic circuits
Energy Storage	On-board capacitors for signal and voltage stabilization
Input Channels	Two independent vibration channels
Measurement Range	Configurable vibration amplitude range
Operating Temperature	0 degrees C to 60 degrees C
Storage Temperature	-40 degrees C to 85 degrees C
Humidity	5% to 95% non-condensing

Functional Overview

This monitor reads proximity probe signals and converts them into vibration amplitude values. Therefore, it tracks shaft movement in real time across both channels. The 86739-01 3500/16 also compares readings against alarm and trip setpoints for machine protection. Meanwhile, its onboard energy storage stabilizes signals against transient electrical noise.

Installation and Handling Notes

Always verify probe gap voltage before connecting transducers to the 86739-01 3500/16. In addition, check that channel addressing matches your protection configuration. Tighten terminal screws evenly to prevent intermittent connections. Finally, test alarm and trip setpoints during commissioning.