Technical Documents

The Tech Docs library explains how Bently Nevada protection hardware is chosen, installed, configured, and troubleshot — written from the spare-parts bench, for the people who keep the machines running. Every guide is practical: part numbers, threads, connectors, and the mistakes we see most often.

New guides are added continuously. If you need the official factory datasheet for a specific model, ask with your inquiry and it travels with the quote.

3500/05 Rack & 3500/20 Interface Overview

This overview explains what the 3500/05 Rack & 3500/20 Interface does inside a Bently Nevada protection train, which models belong to it, and how its parts fit together. Key points at a glance 3500/42M monitors radial and axial vibration in 4 channels per module Rack configuration lives in the 3500/20 interface — spare cards restore…
3500/15 Power Supply Troubleshooting

Work through this checklist before replacing 3500/15 Power Supply — most field symptoms trace to wiring, grounding, or configuration rather than a failed module. Key points at a glance 3500/15 power input module converts cabinet power to regulated rack supply Dual and triple (TMR) power input options for redundant racks Legacy 106M/110M modules serve older…
3500/25 Keyphasor Module Installation Notes

These installation notes summarize the mechanical and electrical points that decide whether an installation involving 3500/25 Keyphasor Module performs to specification from day one. Key points at a glance 3500/42M monitors radial and axial vibration in 4 channels per module Rack configuration lives in the 3500/20 interface — spare cards restore in minutes The 3500/25…
3500/42M Vibration Monitor Configuration Basics

This page collects the configuration points that decide how 3500/42M Vibration Monitor behaves in the rack: setpoints, recording, and the interfaces it talks to. Key points at a glance 3500/42M monitors radial and axial vibration in 4 channels per module Rack configuration lives in the 3500/20 interface — spare cards restore in minutes The 3500/25…
3500/42M Vibration Monitor Overview

This overview explains what the 3500/42M Vibration Monitor does inside a Bently Nevada protection train, which models belong to it, and how its parts fit together. Key points at a glance 3500/42M monitors radial and axial vibration in 4 channels per module Rack configuration lives in the 3500/20 interface — spare cards restore in minutes…
Velomitor & Vibration Sensors Commissioning Checklist

Run this checklist when a Velomitor & Vibration Sensors unit goes into a rack for the first time — it covers the checks that prevent the classic first-month callbacks. Key points at a glance Velomitor and piezo-velocity families for bearing-cap and frame measurements Standard sensitivities: 7.87 V/mm/s (200 mV/in/s) and 100 mV/g variants Mounting threads…
3300 XL Extension Cable Overview

This overview explains what the 3300 XL Extension Cable family does inside a Bently Nevada protection train, which models belong to it, and how its parts fit together. Key points at a glance Standard lengths from 0.5 m to 9 m and beyond; armored and non-armored options Cable length must match the Proximitor configuration for…
3300 XL 8 mm Proximity Probe System Troubleshooting

Work through this checklist before replacing a 3300 XL 8 mm Proximity Probe System unit — most field symptoms trace to wiring, grounding, or configuration rather than a failed module. Key points at a glance Tip diameters: 5 mm, 8 mm standard; case lengths and threads per the installed system Gap voltage is set at…
3500 Monitoring System Replacement & Cross-Reference

This page maps discontinued 3500 Monitoring System part numbers to the parts we stock today, and lists what stays interchangeable and what does not. Key points at a glance 3500/42M monitors radial and axial vibration in 4 channels per module Rack configuration lives in the 3500/20 interface — spare cards restore in minutes The 3500/25…
Probe & Sensor Housings Overview

This overview explains what the Probe & Sensor Housings family does inside a Bently Nevada protection train, which models belong to it, and how its parts fit together. Key points at a glance Probe housings and pressurized housings for 31000/21000 series installations Velocity-transducer housings such as 107770 protect wet or hot positions Material and thread…

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