The 990 Vibration Transmitter is specifically designed for original equipment manufacturers (OEMs) of centrifugal air compressors, small pumps, motors, or fans. It provides a simple 4 to 20 mA proportional vibration signal to machinery control systems for monitoring and alarming purposes. This 2-wire, loop-powered device accepts input from the 3300 NSv* proximity probe and its corresponding extension cable, available in 5 m and 7 m system length options. The transmitter conditions the signal into appropriate peak-to-peak vibration amplitude engineering units, delivering a reliable and standardized 4 to 20 mA output for the control system to trigger machinery protection and alarm logic.

The 990 Vibration Transmitter is primarily designed for Original Equipment Manufacturers (OEMs) of centrifugal air compressors, small pumps, motors, or fans, who prefer to provide a simple 4 to 20 mA proportional vibration signal as an input to their machinery control system. The transmitter is a 2-wire, loop-powered device that accepts input from the 3300 NSv* proximity probe and its matching extension cable, available in 5m and 7m system length options. The transmitter conditions the signal into appropriate peak-to-peak vibration amplitude engineering units and provides this value as a proportional 4 to 20 mA industry-standard signal as the input to the control system, where machinery protection alarming and logic occur.

Key features of the 990 Vibration Transmitter include:
Integrated Proximitor* sensor without the need for external devices
Non-isolated "PROX OUT" and "COM" terminals, along with a coaxial connector, providing dynamic vibration and gap voltage signals for diagnostic purposes
Non-interactive zero and range potentiometers beneath the transmitter label, supporting loop adjustment
Test input pins for quick verification of loop signal output using a signal generator as input
"Uncertainty"/"Signal Failure" circuitry to prevent high outputs or false alarms caused by proximity probe failures or loose connections
Optional DIN rail or panel-mount screws as standard options, simplifying installation
The 990 Vibration Transmitter is designed to offer reliable and straightforward integration into machinery control systems for enhanced monitoring and protection.
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