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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.

  • Velomitor & Vibration Sensors Installation Notes

    These installation notes summarize the mechanical and electrical points that decide whether a Velomitor & Vibration Sensors installation performs to specification from day one. 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 and housing options for wet…

  • 3500 Monitoring System Commissioning Checklist

    Run this checklist when a 3500 Monitoring System 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 3500/42M monitors radial and axial vibration in 4 channels per module Rack configuration lives in the 3500/20 interface — spare cards restore…

  • Velomitor & Vibration Sensors Replacement & Cross-Reference

    This page maps discontinued Velomitor & Vibration Sensors part numbers to the parts we stock today, and lists what stays interchangeable and what does not. 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 and housing options for…

  • 3300 NSv Compact Proximity Sensors Overview

    This overview explains what the 3300 XL 8 mm Proximity Probe System family does inside a Bently Nevada protection train, which models belong to it, and how its parts fit together. Key points at a glance Tip diameters: 5 mm, 8 mm standard; case lengths and threads per the installed system Gap voltage is set…

  • 3500/15 & Legacy Power Supplies Troubleshooting

    Work through this checklist before replacing a 3500/15 & Legacy Power Supplies unit — 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…

  • 3500/25 Keyphasor Module Installation Notes

    These installation notes summarize the mechanical and electrical points that decide whether a 3500 Monitoring System installation 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 keyphasor…

  • 3500 Monitoring System Configuration Basics

    This page collects the configuration points that decide how a 3500 Monitoring System unit 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…

  • 3300 XL Extension Cable Selection Guide

    This guide walks through the parameters you need to order the right 3300 XL Extension Cable part the first time: dimensions, environment, and the part numbers of the units it must work with. Key points at a glance Standard lengths from 0.5 m to 9 m and beyond; armored and non-armored options Cable length must…

  • 3300 XL 8 mm Proximity Probe System Selection Guide

    This guide walks through the parameters you need to order the right 3300 XL 8 mm Proximity Probe System part the first time: dimensions, environment, and the part numbers of the units it must work with. Key points at a glance Tip diameters: 5 mm, 8 mm standard; case lengths and threads per the installed…

  • Machinery Protection Configuration Guide

    A practical guide to configuring alarm and trip setpoints, voting logic, and communication channels on 3500 series systems.

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