Rockwell Automation 9000 Series Sensor - Manual (Page 9)

Entek 9000 Series Sensor Installation Guide 1
9000 Series
1. 9000 Series Sensor Installation
This manual shows you how to install the 9000 series sensors. It is intended for anyone who
installs or maintains a predictive maintenance system with permanently mounted sensors.
Introduction
A sensor (also called a transducer) is a device that measures a physical quantity and
converts it into a proportional electrical signal, typically voltage or current. This signal is
sent through a cable to a central monitoring station. There the signal is converted into a
measurement with meaningful units. For example, the voltage signal from an accelerometer
is converted into a measurement with units of acceleration.
In order for a sensor to function correctly and accurately, several things must be true:
! It must be mounted correctly. For an accelerometer, the best method is to bolt or stud
mount the sensor at the correct location on the machine. Adhesive mounting is a
suitable option when stud mounting is not feasible.
! The cable must be able to carry the signal without degrading the signal at the
frequencies of interest over the length of the cable.
! The cable must be correctly connected to the monitoring device. In some cases, this is a
station where the signal may be processed and tested against one or more alarm
setpoints. In addition, the monitoring device may convert the signal for transmission
over a network. Monitoring devices include data collectors, Enwatch™ units, 6600
Series Protection Monitors, XM™ series, Entrx
®
, and other vibration analysis systems.
! Proper grounding techniques must be observed at all times, and particularly when
running a cable through a junction box.
This manual covers sensors, permanent mounting, and cable installation. Refer to the
specific monitoring device manual for information about connecting the sensor signal to the
monitoring device.
9000 Series Sensors
The 9000 series accelerometers cover a wide range of applications including low frequency
(less than 0.1 Hz or 6 CPM), high frequency (up to 30 kHz or 1500 kCPM), high
temperature (over 250° C), and velocity output (internal integrator). The following table
lists the sensors and characteristics.