Bently Nevada 990-05-XX-03-CN 104M1359-01 Vibration Transmitter

Description

The 990-05-XX-03-CN (Internal Part Number: 104M1359-01) is an industrial, loop-powered 990 Vibration Transmitter engineered by Bently Nevada (a Baker Hughes business) to deliver continuous machinery condition tracking directly to plant control systems. This integrated field unit combines the signal-conditioning electronics of a proximity sensor and a transmitter into a single, space-saving package. It accepts inputs from a non-contacting 3300 XL 8mm eddy-current proximity probe and extension cable system, converting dynamic shaft micro-gap variations into a linear 4 to 20 mA analog current loop. This direct interface allows plant operators to route critical vibration data straight into Programmable Logic Controllers (PLC) or Distributed Control Systems (DCS) without the need for a separate rack-based monitoring monitor.

The exact hardware configuration 990-05-XX-03-CN features a factory-calibrated full-scale measurement scale of 0-5 mils pp (0-125 um pp), optimized for monitoring radial shaft vibration amplitudes. It is equipped with a Bulkhead Coaxial Connector Mounting Option, ensuring a high-integrity mechanical and electrical anchor through junction box enclosures or field bulkheads. Certified with the CN agency approval designation, this module complies with global safety frameworks, including ATEX/IECEx and local Chinese NEPSI hazardous area regulations. The part number 104M1359-01 represents the modern OEM manufacturing assembly designation, incorporating upgraded high-stability surface-mount components and improved RFI/EMI shielding over older product iterations while maintaining identical physical and electrical drop-in backward compatibility.

Features

• Two-wire loop-powered configuration providing a direct 4 to 20 mA proportional current output to DCS/PLC automation cards.
• Standardized 0-5 mils peak-to-peak (0-125 um peak-to-peak) linear scale calibration for precision shaft vibration logging.
• Robust bulkhead coaxial mounting arrangement for secure structural installation through panel or enclosure walls.
• Dual hazardous zone certifications matching global ATEX/IECEx standards with local Chinese NEPSI industrial markings.
• Modern 104M1359-01 component build featuring enhanced noise immunity and thermal stability in harsh processing zones.
• Front-mounted isolated BNC dynamic terminal providing raw, unconditioned voltage waveforms for on-site diagnostic analyzers.
• Independent non-interacting zero and span adjustment pots allowing seamless calibration verification under field conditions.

Applications

• Standalone radial shaft vibration monitoring on fluid-filmed bearings of industrial process fans and blowers.
• Direct asset protection loop integration for medium-sized balance-of-plant electric motors and centrifugal pump skids.
• Distributed machinery monitoring inside remote oil and gas transport pipeline stations or water utility infrastructure.

Option String Breakdown

Technical Specifications

Connections/Interfaces

Installation Guidelines

• Bulkhead Mount Assembly: Secure the transmitter body through the enclosure wall panel or custom bulkhead interface plates using the integrated mechanical thread mounts to ensure a clean, rattle-free anchor.
• Electrical Ground Isolation: Verify that the transmitter housing base plate remains electrically isolated from structural cabinet metals. This isolation blocks raw loop noise and prevents ground currents from corrupting vibration waveforms.
• System Length Synchronization: Check that your specified system length option (Option -XX) perfectly matches the total physical length of the attached 3300 XL 8mm probe and extension cable to maintain calibrated accuracy.
• Dynamic Signal Diagnostics: Connect vibration data collectors directly to the front-facing BNC socket for diagnostics. This isolated port outputs raw data (200 mV/mil) without affecting or interrupting the primary 4-20 mA control loop signaling.