10
SECTION 7- MOUNTING THE ACCELEROMETER
For reliable vibration data, particularly at high frequencies, it is important
that your accelerometer be mounted correctly
.
Different mounting
techniques provide for different frequency response characteristics from
the accelerometer
.
Figure 7-1 is a frequency response plot describing the
relative merits of seven common mounting techniques.
Figure 7-1.Frequency Response of Different Mounting Techniques
STUD MOUNTING
Most OMEGA accelerometers have a mounting stud protruding
from the bottom of the unit. This stud may or may not be
removable, depending upon the model. When attaching the
accelerometer with the mounting stud, you should make certain that
the mating hole is clean of debris and that it is deep enough to
accommodate the mounting stud
.
The surface should be flat,
clean, and dry. Refer to Tables I and II below for the recommended
flatness, perpendicularity, and bolt seating torque.
For those applications requiring a flat bandwidth above 4KHz, a
light film of grease may be applied between the accelerometer and
the mounting surface. The grease film provides enhanced dynamic
transmission at the higher frequencies.
