Product Overview

The Bently Nevada 990-10-XX-01-00, featuring the MOD:165353-01 modification, is a specialized 2-wire vibration transmitter designed to provide a seamless interface between proximity probes and industrial control systems. This device functions as both a proximitor and a signal conditioner, converting the complex gap voltage from a proximity probe into a stable 4 to 20 mA DC signal. This allows for direct integration into Programmable Logic Controllers (PLCs) or Distributed Control Systems (DCS) without the requirement for a centralized 3500 series rack. It is particularly effective for monitoring radial vibration or axial position on Balance of Plant (BoP) machinery where cost-effective, high-integrity protection is a priority.

Key Technical Characteristics and Hardware Parameters

The 990-10 series is engineered to deliver API 670 compliant performance in a compact, field-mountable package capable of withstanding industrial interference.

• Model Number 990-10-XX-01-00

• Modification Number MOD:165353-01

• Output Configuration 2-wire, loop-powered 4 to 20 mA DC signal

• Transducer Compatibility Calibrated for use with Bently Nevada 3300 XL 8mm proximity probe systems

• Linear Range Typically 2.0 mm (80 mils) using a 3300 XL 8mm probe

• Dynamic Measurement Includes a "Prox Out" buffered signal via BNC or terminals for high-resolution waveform analysis

• Hazardous Area Certification Option -01 provides CSA/NRTL/C (Class I, Div 2) approval

• Frequency Response 5 Hz to 10 kHz (300 to 600,000 cpm)

• Temperature Stability Operates reliably within a range of -35°C to +85°C

• Physical Weight 0.46 kg

• Dimensions 7.4 x 5.5 x 9.8 cm

Industrial Applications and Operational Use Cases

The 990-10 transmitter is ideally suited for monitoring essential rotating assets that require continuous surveillance but do not necessitate a full-scale monitoring rack.

• Centrifugal Pumps and Motors Providing real-time 4-20 mA vibration data to a plant DCS for trend analysis and automated alarm triggering.

• Cooling Tower Fans Monitoring vibration in remote areas where the cost of specialized vibration cabling to a central rack is prohibitive.

• Small Steam and Gas Turbines Acting as the primary radial vibration interface for auxiliary power units and mechanical drive systems.

• Industrial Blowers and Air Handlers Detecting mechanical instabilities such as unbalance, misalignment, or bearing degradation in HVAC and process air systems.

• Predictive Maintenance Integration Utilizing the buffered "Prox Out" signal to connect portable FFT analyzers for detailed fault frequency identification without interrupting the protection loop.

By implementing the 990-10-XX-01-00 MOD:165353-01, facilities can achieve high-level machinery protection and early fault detection across a broader range of plant assets, ensuring maximized uptime and reduced maintenance overhead.