Description

The Bently Nevada 3300/25 Dual Accelerometer Monitor is a high-reliability, rack-mounted module designed for the 3300 Series monitoring system. This unit provides continuous, dual-channel monitoring of casing vibration, utilizing accelerometer inputs to protect critical rotating machinery such as turbines, compressors, and pumps. By comparing real-time vibration data against pre-configured alarm setpoints, the module ensures timely detection of mechanical faults.

Features

• Dual independent channels for simultaneous monitoring of two vibration points.
• Continuous signal processing with dedicated Alert and Danger alarm setpoints.
• Integrated relay outputs for automated machine protection and shutdown sequences.
• Proportional 4–20 mA outputs for integration with external control systems or data recorders.
• Front-panel LED indicators providing immediate status updates for OK, Bypass, Alert, and Danger conditions.
• Designed for integration into standard 3300 Series rack environments.

Applications

This monitor is specifically engineered for industrial environments requiring precise casing vibration analysis. It is commonly deployed in power generation, petrochemical processing, and oil and gas facilities to monitor the structural health of centrifugal pumps, gas turbines, and large-scale compressors.

Technical Specifications

Installation Guidelines

• Ensure the 3300 Series rack is properly grounded to a common plant ground to minimize EMI/RFI interference.
• Handle the module using standard ESD-safe practices to prevent damage to internal circuitry.
• Verify that the slot in the 3300 rack is configured correctly for the 3300/25 module before insertion.
• Always power down the rack before inserting or removing the monitor module to prevent electrical arcing or configuration errors.
• Use shielded cables for all transducer inputs to maintain signal integrity in high-noise industrial environments.
• Ensure adequate airflow within the cabinet to maintain operating temperatures within the specified -30 degC to +65 degC range.

FAQ

What is the primary function of the 3300/25 monitor?

The 3300/25 is designed to measure casing vibration using accelerometer inputs, providing continuous monitoring and alarm functionality to protect rotating machinery.

Does this module support intrinsic safety?

The specific model 3300/25-01-03-03-00-00-01-00 is configured with standard input barriers (no intrinsic safety barriers). Please verify your site requirements for hazardous area classification.

How are the alarm setpoints configured?

Alarm setpoints for Alert and Danger conditions are configured within the 3300 series system architecture, allowing for precise threshold management based on the specific vibration characteristics of the monitored equipment.