Bently Nevada 990-08-XX-01-00 3300 XL Vibration Transmitter

Product Overview

The Bently Nevada 990-08-XX-01-00 (MOD 165353-01) serves as a robust 2-wire vibration transmitter that bridges the gap between proximity sensors and control systems. It integrates the Proximitor sensor and signal conditioning circuitry into a single DIN-rail mounted module. This transmitter converts the raw eddy current signal from a proximity probe into a standard 4-20 mA current loop, allowing direct monitoring of radial vibration via a PLC or DCS. We supply this product as 100% Brand New and Original, ensuring full compliance with factory specifications for critical asset protection.

Part Number Breakdown

The 990 series utilizes a specific alphanumeric sequence to define calibration and mounting configurations:

Technical Specifications

The 990-08 transmitter maintains precise machinery data across long-distance cable runs:

• Current Loop Output: 4-20 mA (Proportional to 0-10 mils pp vibration).

• Linear Proximity Range: 10 to 65 mils (0.25 to 1.65 mm).

• Total System Length: 9.0 Meters (Calibrated for specific probe/cable combinations).

• Mounting Architecture: 35 mm DIN Rail Clips for rapid cabinet installation.

• Supply Voltage: Accepts +12 to +35 Vdc loop power.

• Shipping Weight: 2.0 Kg (Including protective industrial packaging).

• Origin: USA (Genuine Bently Nevada Factory Product).

Engineering Advantages

The 990-08-XX-01-00 addresses complex industrial monitoring requirements through targeted design features:

• Extended 9-Meter Reach: The 9-meter system length option allows for transmitter installation in remote, safe-area cabinets while the probe remains deep within the machine train. This eliminates the need for intermediate junction boxes in many configurations.

• Standardized 4-20 mA Integration: By outputting a standard current loop signal, the 990-08 removes the necessity for expensive, dedicated vibration monitoring racks. It feeds vibration data directly into your plant's existing control infrastructure.

• Simplified Field Diagnostics: Each unit includes a buffered "PROX OUT" terminal. Maintenance teams can connect a portable vibration analyzer to this port to view the raw waveform without breaking the 4-20 mA control loop.

• EMC Shielding: The module incorporates high-grade electromagnetic interference shielding. This prevents signal drift and "false trips" caused by the high-frequency noise generated by nearby Variable Frequency Drives (VFDs).

FAQs

Must I use a 9-meter cable with this specific transmitter?

Yes. The 990-08-XX-01-00 is factory-calibrated for a 9-meter total system length. You must ensure the combined length of your proximity probe and extension cable equals exactly 9 meters. Using a 5-meter or 7-meter setup will result in significant measurement errors and non-linear output.

What is the significance of the MOD 165353-01 code?

The MOD code indicates a specific factory modification or internal component update authorized by Bently Nevada. This ensures the transmitter meets the latest performance revisions while remaining fully backward compatible with the standard 990-08 series footprint.

How does the transmitter handle a probe failure?

The unit features a "NOT OK" status indication within the 4-20 mA signal. If the probe or cable becomes open-circuited or shorted, the transmitter drives the output current below 3.6 mA, allowing the DCS to trigger a system fault alarm rather than a false high-vibration trip.

Can I mount this transmitter in a high-vibration area?

While the transmitter features 35 mm DIN rail clips for secure mounting, you should install it in an enclosure (NEMA 4X or IP65) to protect the electronics from moisture and excessive structural vibration. This preserves the 100% brand-new integrity of the unit over its multi-decade service life.