990-05-XX-03-05 990 Series Vibration Transmitter | Bently Nevada

Product Overview

The Bently Nevada 990-05-XX-03-05 functions as a high-performance, two-wire vibration transmitter engineered for critical machinery protection. It accepts signals from proximity probes and converts them into a standard 4-20 mA DC output proportional to peak-to-peak vibration. This specific configuration includes high-level agency approvals, including ATEX, CSA, and ABS maritime certifications, making it the primary choice for offshore, marine, and hazardous area applications. We supply this unit as 100% brand new, original equipment.

Part Number Breakdown

The 990-05-XX-03-05 configuration utilizes the following technical coding:

Technical Specifications

This transmitter delivers precise signal conditioning for modern control architectures:

• Output Signal: 4-20 mA loop (1,000 Ω maximum loop resistance).

• Frequency Response: 5 Hz to 6,000 Hz ±0.3 dB.

• Input Power: Requires +12 to +35 Vdc.

• Operating Temp: -35°C to +85°C (-31°F to +185°F).

• Probe Gap: 0.5 mm to 1.75 mm (20 mils to 55 mils).

• Cable Type: 75Ω coaxial, Fluoroethylene Propylene (FEP) insulated.

• Tensile Strength: 222 N (50 lbf) maximum probe case to lead tension.

Engineering Advantages

• Multi-Certified Compliance: The "05" approval suffix enables global deployment. It satisfies stringent ATEX requirements for explosive atmospheres and ABS standards for marine vessels and offshore platforms, reducing the need for localized inventory variants.

• Simplified Field Calibration: The transmitter features non-interacting external adjustments for zero and span. Technicians calibrate the loop quickly without the signal "drift" common in lower-quality analog transmitters.

• High Impedance Loop Compatibility: Supporting up to 1,000 Ω of loop resistance, this unit maintains signal accuracy even over long field wiring runs to remote control rooms or high-input-impedance PLC cards.

• Rugged Signal Integrity: FEP-insulated coaxial cables resist chemical exposure and moisture. The transmitter maintains high frequency-response linearity (±0.3 dB), ensuring that the control system receives a true representation of the machine's vibration profile.

FAQs

• What is the benefit of the ABS maritime approval on this model?

  The ABS (American Bureau of Shipping) certification verifies that the transmitter meets specific vibration, environmental, and electrical standards required for use on ships and offshore drilling rigs.

• Can I adjust the vibration range in the field?

  No. The 0-5 mils full-scale range is factory-set. However, you can use the non-interacting zero and span adjustments to fine-tune the 4-20 mA output to match your control system's scaling precisely.

• How do I choose between the 50 and 70 "XX" options?

  You must match the "XX" code to your existing probe and extension cable length. A "50" transmitter requires a 5-meter total system length, while a "70" requires a 7-meter system. Mixing lengths will cause severe measurement errors.

• Does this unit come in original packaging?

  Yes. We only sell 100% brand new Bently Nevada hardware in original factory packaging, complete with all necessary documentation and traceability.