Bently Nevada 3300/16 Dual Vibration Monitor

Two-Channel Radial Vibration Measurement for Machinery Protection

The Bently Nevada 3300/16 dual vibration monitor continuously measures radial vibration across two independent channels. This module accepts input signals from two 3300 XL 8 mm Proximitor systems for comprehensive shaft monitoring. It detects early signs of unbalance, misalignment, and bearing wear in rotating equipment. The monitor suits steam turbines, compressors, pumps, and large motors.

Technical Specifications

Parameter	Specification
Model Number	3300/16
Brand	Bently Nevada
Category	Dual Vibration Monitor
Channels	2 independent
Input Type	3300 XL 8 mm Proximitor, 200 mV/mil
Scale Factor	7.87 V/mm
Full-Scale Range	0 to 15 mils peak-to-peak (0 to 300 μm)
Input Impedance	50 kΩ minimum
Frequency Response	4 to 4000 Hz or 1 to 600 Hz (user-programmable)
Accuracy	±0.33% of full-scale
Display	Non-multiplexing vertical LCD
Recorder Outputs	4-20 mA, 0 to -10 VDC, or +1 to +5 VDC
Alarm Relays	2 per channel (programmable)
Trip Multiply	Standard bypass configuration
Power Consumption	2.0 W nominal
Operating Temperature	-30°C to +65°C
Weight	1.02 kg
Dimensions (HxWxD)	192 x 140 x 89 mm
Country of Origin	USA

Dual-Channel Measurement Architecture

This monitor processes vibration signals from two independent proximity probe channels. Each channel measures both dynamic vibration amplitude and static gap voltage. The precision input stage maintains a calibrated sensitivity of 200 mV/mil. This dual-channel design enables XY measurement configurations for complete shaft orbit analysis.

Programmable Frequency Response

The module offers user-selectable frequency ranges for different machine types. You can choose 4 to 4000 Hz for high-speed turbines and compressors. Alternatively, the 1 to 600 Hz range suits slower rotating equipment such as large pumps. This flexibility ensures optimal measurement performance across diverse applications.

Advanced Signal Processing Features

An internal filter design effectively suppresses crosstalk from adjacent probes in close proximity. The non-multiplexing display shows both channels simultaneously for convenient monitoring. Each channel provides two independent alarm setpoints with individual programming capability. Therefore, you can configure separate warning and trip levels for each measurement point.

Reliable Fault Detection

A built-in Not OK circuit continuously monitors each transducer channel for faults. The system detects wire breaks, impedance faults, and sensor disconnections reliably. Upon detecting a probe failure, the monitor de-energizes the affected channel within 100 milliseconds. This rapid response prevents false alarm trips and maintains system integrity.

Flexible Output Integration

You can field-select recorder output options to match your system requirements. The module supports 4-20 mA, 0 to -10 VDC, or +1 to +5 VDC outputs. This versatility enables straightforward integration with DCS, PLC, and SCADA platforms. Additionally, the alarm relays provide direct control of external protection devices.

Installation and Application

This monitor fits standard 3300 series rack systems for seamless integration. Its compact 192 x 140 x 89 mm footprint saves valuable panel space. The lightweight 1.02 kg design simplifies installation and maintenance procedures. Operators in power generation, oil and gas, and manufacturing facilities rely on this module for critical vibration monitoring.