ACCELEROMETER MOUNTINGS PDF

An accelerometer is a sensor that senses the dynamic motion of the surface that it is attached to by producing an electrical output which is. The mounting of a vibration sensor (accelerometer) directly impacts on its performance. Incorrect mounting may give readings that relate not only to a change in. Accelerometer Mounting Techniques are described as far as Mounting Surface Preparation, Installation and a variety of methods.

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This ensures the exact duplication of motion of both bodies at all frequencies. Is the area a wet or a wash down area? When tightening, do not apply more than the recommended torque to the accelerometer.

Guidelines for Mounting Test Accelerometers

Make sure accelerrometer the mounting stud is not too long resulting in a gap between sensor and test object Insulating Flanges 2 x M3 2 x M5 2 x M8 Avoid ground loops. As such, correct mounting of omuntings vibration sensor is vital to ensure true readings. The must be no gap under the sensor.

To achieve a montings degree of surface contact, apply a thin layer of silicone grease between the accelerometer base and the mounting surface. Large Mounting Clips Set of Keep the film as thin as possible to avoid any unwanted dampening of the vibrations due to the flexibility of the film.

When using screw mounting, make sure that the screw is not longer than the threaded hole. Accelerometers should be mounted onto a surface that is free from oil and grease as close as possible to the source of vibration. However, dual-rail magnets can significantly decrease the operational frequency range of an accelerometer.

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Frequency measurements want to be well below the resonance frequency of the accelerometer. ACC A is hermetically sealed for harsh environments, has a fixed cable and weighs only 50 grams.

If lapping is not possible, other machining processes such as grinding, spot facing, milling, turning, etc. Drilling a countersink will increase repeatability. For applications where drilling is not allowed or possible. Gently rock or slide the assembly mountins place.

Be sure to follow the specified torque settings to avoid damaging the sensor or stripping the threads. Approximate frequency ranges of mounting techniques. Any stud bottoming or interference between the accelerometer base and the structure inhibits acceleration transmission and affects measurement accuracy.

For quick mounting of light sensors at room temperature and low acceleration. Adhesives such as epoxy or cyanoacrylate have proven to provide satisfactory bonding for most applications.

Resonance frequencies of different mounting methods Metra accelerometers may have the mounting thread sizes: Stud Mounting The stud mount method is the preferred method of mounting an accelerometer to the test object.

Types of Accelerometer Mounting

How to mount a vibration sensor. This provides the best high-frequency transmissibility. The type of adhesive recommended depends on the application.

Accelerometer Mounting Choosing the optimum mounting arrangement will significantly improve the accuracy. Noise levels are specified in g’s, i. Types of Accelerometer Mounting admin T Frequency Response is determined by the mass, the piezoelectric properties of accelrometer crystal, and the resonance frequency of the case.

Usually, there is a thin layer of silicone grease between mating surfaces to fill any voids between. Adhesive Mounting When qccelerometer situation arises that the stud mount method is impractical or impossible, adhesive mounting is the recommended method. Steel pads can be welded or epoxied in place to accept the magnetic base when surfaces are uneven or non-magnetic.

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Cable clamps M5 M3 Avoid introduction of force via the cable into the transducer. Wedged, dual rail magnetic bases are typically used for installations on curved surfaces such as motor and compressor housings and pipes. UA Set of plastic clips with thick base that can be filed down to suit your mounting surface.

How to choose an accelerometer? Mounting methods for accelerometers Figure 17 compares the typical high frequency performance of some mounting methods as a result of added mass and reduced mounting stiffness.

Accelerometers: Types, What It Is & How It Works | Omega

Such as when mounting the accelerometer on a thin sheet of metal where it is not possible to drill for stud mountijgs. This can be accomplished by several types of mounts: It is typically governed by the mechanical resonance of the accelerometer. Attach the accelerometer via the M5 thread. DV Large Calibration Clip for mounting accelerometers under calibration.

Magnet mounted accelerometer Shop Accelerometers. Mounting an Accelerometer The sensor must be mounted directly to the machine muontings to correctly measure the vibrations. An accelerometer is a device that measures the vibration, or acceleration of motion of a structure.

The ACC weighs 15 gms and can monitor vibration levels up to g’s. The sensor under test should be stud mounted whenever possible for accelerometeer accuracy. Magnets with high pull strengths provide the best high-frequency response.

The output level will be proportional to the amplitude of the vibrations.