Bently Nevada 3500/70M-01-00 176449-09 Proximitor Monitor

This four-channel monitor provides continuous protection for rotating machinery using eddy current proximity probes. It accepts inputs from 3300 NSv, 3300 XL, and 7200 series proximitors for comprehensive shaft vibration measurement. The monitor compares conditioned signals against user-programmable alarms to safeguard critical machinery .

Channel Configuration and Measurement Parameters

The Bently Nevada 3500/70M-01-00 176449-09 supports up to four channels, each capable of accepting a proximitor input with 10 kΩ impedance . You can configure each channel for radial vibration, axial position, differential expansion, or eccentricity measurements . The module derives two separate outputs per channel: dynamic vibration data (Pk-Pk) and static gap voltage . It uses a fixed 1 Hz to 600 Hz peak-peak filter for vibration data and a 0.09 Hz gap filter for static position .

Technical Specifications

Specification	Detail
Model	3500/70M-01-00 (Part 176449-09)
Product Type	Proximitor Monitor Module
Channels	4
Input Type	Proximitor (3300 NSv, 3300 XL, 7200 series)
Input Impedance	10 kΩ
Measurement Modes	Radial vibration, Axial position, Differential expansion, Eccentricity
Frequency Response (Pk-Pk)	1 Hz to 600 Hz
Gap Filter	0.09 Hz
Range (Vibration)	0 to 200 µm pk-pk (0 to 8.0 mils)
Accuracy	±0.33% of full scale
Alarm Setpoints	Programmable (Alert and Danger)
Power Consumption	7.7 watts nominal
Dimensions	241.3 × 24.4 × 241.8 mm
Weight	0.91 kg
Operating Temp	-30°C to +65°C
Storage Temp	-40°C to +85°C
Humidity	5% to 95% non-condensing
Certifications	CE, UL, CSA

Signal Processing and Alarm Functions

The module processes each channel and generates conditioned outputs, including pass-through buffer signals . You can program Alert and Danger alarm setpoints to protect the machinery from damage . Alarm delays range from 1 to 60 seconds for Alert and can be set to 0.1 second intervals for Danger . The module performs a transducer linearization check using stored calibration coefficients . Notch filters reject 1X and 2X running speed components with high attenuation .

System Integration and Application Use

This module integrates into the Bently Nevada 3500 rack system and interfaces with System 1 software . It provides buffered transducer outputs via coaxial connectors on the front panel . The module supports applications such as shaft vibration monitoring, thrust position monitoring, and casing expansion measurements . Industries include power generation, oil and gas, petrochemical, and steel manufacturing .