Description

The Bently Nevada 990-04-70-02-00 is a specialized vibration transmitter designed for continuous monitoring of machinery vibration. As part of the 990 series, this unit provides a reliable interface between proximity probe sensors and monitoring systems, converting raw vibration data into a proportional signal for process control or protection systems.

Features

• Full-scale range: 0-4 mils pp (0-100 um pp)
• System length: 7.0 meters (23.0 feet)
• Mounting configuration: Bulkhead screws
• Robust design for industrial environments
• Direct integration with standard proximity probe systems

Technical Specifications

Installation Guidelines

• Ensure the transmitter is mounted in a location protected from direct moisture and extreme heat sources.
• Use appropriate shielded cabling for the probe connection to minimize EMI/RFI interference.
• Verify that the system length (7.0 meters) matches the installed probe and extension cable configuration to maintain calibration accuracy.
• Ensure all bulkhead mounting screws are tightened to provide a secure, vibration-resistant connection.
• Power down the associated monitoring loop before connecting or disconnecting the transmitter terminals.

FAQ

What is the primary function of the 990 vibration transmitter?

The 990 transmitter converts the output from a proximity probe into a 4-20 mA signal, allowing standard PLC or DCS systems to monitor machinery vibration levels without requiring a full rack-based monitoring system.

Can this unit be used with any proximity probe?

The 990 series is designed to work with Bently Nevada proximity probe systems. The system length of 7.0 meters is factory-calibrated for this specific configuration.