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990 Vibration Transmitter
Datasheet
Bently Nevada Machinery Condition Monitoring 141612 Rev. R
Description
The 990 Vibration Transmitter is intended primarily for the
original equipment manufacturers (OEMs) of centrifugal air
compressors or small pumps, motors, or fans who prefer to
provide a simple 4 to 20 mA proportional vibration signal as
the input to their machinery control system.
The transmitter is a two-wire, loop-powered device that
accepts input from our 3300 NSv proximity probe and its
matching 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, 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 occurs .
The 990 transmitter provides the following notable features:
l Integrated Proximitor Sensor requires no external unit
l Non-isolated "PROX OUT
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