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The basic requirement for correct sensor mounting is close mechanical contact between the accelerometer’s base and the mounting surface. To achieve it, you can use a wide range of special applications for mounting. Let us take a look at the most used ones:
Mounting Stud
Mounting the accelerometer with the help of a steel stud is the best mounting method: this way you can achieve the highest resonance frequency. It is recommended to always use this method of mounting when possible.
Wax mounting
To fix the accelerometer quickly (for example, when you monitor the vibrations at different points by moving the accelerometer) you can use beeswax for easy mounting and demounting. This method has a temperature limit of 40°C, as beeswax can melt. Besides, the wax will have to be removed using alcohol, which might be inconvenient.
Magnetic Mounting
This convenient method of mounting uses a constant magnet, which can be easily moved from one place to another. It is especially handy when you need to gather data in many points of measurement in the minimum possible test time. This method can only be used on clean flat ferromagnetic surfaces and its dynamic range is limited by the power of the magnet. However, this method can provide good high-frequency characteristics, especially on flat surfaces. Applying a magnet base onto the magnet provides eclectic isolation between the accelerometer and the mounting surface.
Electrical Isolation Bases
In places where eclectic isolation of the object from the accelerometer is desirable, you can use isolation bases. This may be necessary if the electric potential of the object under test is different from the ground potential of the measuring instruments, or if mounting a stud itself creates a “ground loop”, which can affect measurement results. The latter reason is the most common cause of choosing mounting with an electric isolation base. There are also special isolating mounting bases made of ceramics and metal integrated together, which may be used when working in high temperatures.
