Bently Nevada 84933-02 Six-Channel Temperature Monitor

Product Overview

The Bently Nevada 84933-02 is a Six-Channel Temperature Monitor from the 3300/30 series. This monitor accepts inputs from multiple temperature sensor types including thermocouples and RTDs (Resistance Temperature Detectors), providing real-time temperature monitoring for rotating machinery protection.

Key Specifications

• Manufacturer: Bently Nevada (Baker Hughes)
• Product Family: 3300 Series Monitoring System
• Type: Six-Channel Temperature Monitor
• Part Number: 84933-02
• Related PWA: PWA 84933-01
• Input Channels: 6 channels
• Input Sensor Types: Thermocouples, RTDs (Resistance Temperature Detectors)
• Function: Real-time temperature monitoring and machinery protection
• Compatibility: Bently Nevada 3300 Series Monitoring System
• Application: Temperature monitoring on turbines, generators, motors, compressors, and other rotating machinery

Installation Guide

1. Rack Installation: Install the 84933-02 module into an available slot in the Bently Nevada 3300 monitoring system rack. Ensure the module is fully seated and the retaining screws are tightened.
2. Sensor Wiring: Connect temperature sensors (thermocouples or RTDs) to the designated input terminals. Follow the wiring diagram in the official Bently Nevada installation manual for proper polarity and shield connections.
3. Shield Grounding: Ground sensor cable shields at the monitoring system end only to prevent ground loops. Do not ground at both ends.
4. Configuration: Use the 3300 system configuration software to set sensor type (thermocouple type or RTD type), temperature range, alarm setpoints, and relay logic for each channel.
5. Calibration Verification: Apply known temperature references to verify channel accuracy. Compare module readings against certified reference standards.
6. Alarm Testing: Test alarm and relay outputs by simulating over-temperature conditions. Verify proper alarm annunciation and relay actuation.

FAQ

Q: What temperature sensors are compatible with the 84933-02?
A: The 84933-02 supports thermocouples (various types) and RTDs (Resistance Temperature Detectors). Specific sensor types and ranges must be configured per channel using the 3300 system configuration software.

Q: What is the difference between 84933-01 and 84933-02?
A: The 84933-01 is the printed wiring assembly (PWA) component. The 84933-02 is the complete monitor module assembly. Both are part of the 3300/30 Six-Channel Temperature Monitor system.

Q: Is the 84933-02 compatible with the 3500 monitoring system?
A: The 84933-02 is designed for the 3300 series monitoring system. For the 3500 system, consider the 3500/60 or 3500/61 temperature monitor modules. Verify compatibility with your specific system architecture before ordering.

Q: How many temperature points can I monitor with one 84933-02?
A: One 84933-02 module provides six independent temperature monitoring channels.

Selection Tips

• Verify your monitoring system is the 3300 series before ordering the 84933-02. For 3500 systems, select the appropriate 3500-series temperature monitor.
• Determine the sensor type (thermocouple vs. RTD) and temperature range required for your application before configuration.
• Ensure adequate rack space is available in your 3300 monitoring system chassis.
• When replacing a failed module, verify the exact part number (84933-02) to ensure identical functionality and connector compatibility.
• For critical applications, consider maintaining a spare module in inventory to minimize downtime.