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Technical Information
Accelerometer Installation
The accelerometer can be mounted to the measurement object in one of the four
general ways outlined below. The accelerometer mounting method greatly af-
fects the contact resonance frequency *. The advantages and disadvantages of
various methods are described in this section.
Rigid screw mounting
This mounting principle assures optimum frequency re-
sponse characteristics. The mounting surface should be per-
fectly smooth, and the screw holes (M6) must be drilled in
such a way so as not to disturb perpendicularity of the ac-
celerometer.
Insulation attachment mounting
This mounting principle is used when electrical insulation
between accelerometer and measurement object is required.
The contact resonance frequency will be lower than with
rigid screw mounting. Regarding the screw holes, the same
precautions as for rigid screw mounting apply.
Magnet attachment mounting
Because the contact resonance frequency will be quite low,
this principle is mainly suited for vibration measurements
in the medium to low frequency range. The maximum ac-
celeration that can be measured depends on the accelerom-
eter mass.
Rod attachment mounting
Pressing the accelerometer against the measurement object
with a rod is the simplest method, but it is only suitable for
measurements below 500 Hz, because contact resonance
frequency will be very low. This method should only be
used if the other three mounting methods are not feasible.
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