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.
