8
installation
Mechanical Installation
Orientation
The sensitive vibration “measuring” axis is perpendicular to the base of the unit
(vibration switch or transducer). Always mount the unit such that the desired
vibration of the equipment being monitored will occur along this axis.
Mounting Surface
Choose or fabricate a solid (rigid) surface (on the equipment being monitored)
to mount the vibration switch or transducer. This will ensure transfer of the
vibration to the vibration transducer, while not introducing spurious vibrations.
In addition, the surface presented to the base of the unit should be flat. Fasten
using sturdy hardware at all places provided.
Temperature Considerations
The switch is designed to dissipate internal heat by conduction through its
base. Hence, it is important to keep the mounting surface below the switch
max temperature limit of 140°F. If the equipment being monitored is going
to exceed this limit, consideration should be given to either using one of the
remote transducers, or thermally isolating the switch.
To ensure accurate switch performance, a warm-up time of 5 minutes is rec-
ommended.
Cable/Wiring
The method chosen to electrically connect to the switch or transducer should
be mechanically flexible, to eliminate the measurement of vibration of material
not of interest (piping, etc.), and provide a moisture barrier as well.
Although seal tight and other flexible conduit have been used successfully, in
areas of extreme humidity or moisture it is recommended that an “SO” type
cable together with a suitable rain-tight CGB fitting be used.
No stress should be possible on the wiring to the terminal block. If such pro-
tection is not provided by the conduit system, some form of stress relief must
be installed where the wiring exits the 440.
