EVA (Electronic Vibration Analyzer) 2 – How to Use It? In this article, we will discuss the different functions and modes of the EVA-2. We’ll also discuss where to place the vibration sensor. So, if you have an EVA-2, let’s get started! Continue reading to learn more! You’ll soon see why this tool is so useful and what the modes are.
EL-38792-A Electronic Vibration Analyzer 2 (EVA-2)
The EL-38792-A Electronic Vibriommeter is a 12-volt hand-held device that displays the most dominant input frequency. This frequency is used as the primary input to identify the source of vibrations. This machine can be used in conjunction with Vibration Analysis Diagnostic Tables to provide a detailed and reliable report of the problem.
The EVA-A has two display modes: averaging and non-averaging. Non-averaging mode displays the most dominant frequencies immediately. Averaging mode uses multiple vibration samples to minimize distractions caused by sudden changes in vibration frequency. This feature is recommended for testing equipment that experiences short-term vibration disturbances. The EVA-A can also be used for acceleration/deceleration tests.
After calibrating the EL-38792-A Electronic Vibrigration Analyzer, place the vibration sensor over the tire and wheel assembly. You may need to use additional weight on the wheel to ensure that the wheels are balanced. The extra weight should be distributed evenly across the outboard and inboard flanges of the wheel. This will prevent the wheel assembly from disturbing the dynamic balance of the assembly.
Functions
An EVA vibration tool is a device that measures elevator ride quality. It provides information about vibration, sound, and ride quality. This tool has become the gold standard for elevator vibration analysis and is the world’s leading supplier of high-accuracy instrumentation. Its auto-mode mode allows the user to choose the frequency range that best suits their needs. The EVA vibration tool also features a number of features to make the process of measuring elevator ride quality easier and faster.
The EVA features two display modes: averaging and non-averaging. In the former, it displays the frequency of vibrations in a bar graph format. In the latter, it displays the actual amplitude strength in G-s of acceleration force. The non-averaging mode displays the frequency at a specific moment in time, making it ideal for detecting short-term vibration disturbances and acceleration/deceleration tests.
When operating an EVA, the vibrations generated should be matched with the frequencies displayed by the EVA. When the dominant frequency of the recorded vibration is not related to the first-order rotational speed, the propeller shaft should not be fine-tuned. The frequency readings must match the recorded vibration frequency and amplitude. If there is a mismatch between the two, it’s not recommended to fine-tune the propeller shaft balance.
The Electronic Vibration Analyzer-2 (EVA-2) has two sensor input ports. It uses the most dominant vibration frequency. This allows the EVA-2 to identify the first-order tire and confirm diagnostic results. The EVA-2 also includes a special Auto-Mode, which prompts the user to select the SUSPECTED vibration source. You can use this function to confirm the diagnostic results, and the EVA-2 is an excellent vehicle vibration tool.
Modes
EVA comes with 2 modes of display: averaging and non-averaging. Averaging mode uses multiple vibration samples to display the most dominant frequencies. Instantaneous mode, on the other hand, displays only one vibration frequency at a time. This mode is useful for short-term disturbances or acceleration/deceleration tests. Using averaging mode can help you focus on the most important vibration frequencies.
The Electronic Vibration Analyzer-2 (EVA-2) has an Auto-Mode feature that prompts the user to select the suspected source of vibrations. The software will use the vehicle’s data parameters and the predominant vibration frequency to identify the source. Its Auto-Mode function can confirm diagnostic results and identify a first-order tire. It also provides a visual representation of the amplitude strength, measured in G’s of acceleration.
The EL-38792-A Electronic Vibration Analyzer 2 shows the most common input frequencies as well as the amplitude strength of each frequency. The screen also displays the suspected source of vibration by displaying a bar graph. On the right side of the screen, the top row of the screen lists the units of measurement, the vibration sensor input port, and the mode of measurement. The modes of eva vibration tool are:
The EL-38792-A Electronic Vibration Analyzer-2 is directional sensitive, meaning it can detect disturbances in the up-and-down directions. Because most vibrations are felt in the up-and-down direction, this tool is sensitive to vibrations in that direction. For accurate results, it is important to attach the vibration sensor in the right way. And once you’ve attached it, the software will display a series of vibrations in various directions, making it possible to determine whether you’re experiencing any issues.
Placement of vibration sensor
A proper placement of the vibration sensor is crucial for correct readings. It should be mounted on a component of the vehicle that responds most quickly to vibrations. Most vibrations occur up and down. The sensor should be installed in the same position in both directions. For instance, if you use an EVA-2 for your diagnostic purposes, you must attach it to the steering column in the same way.
When utilizing an EVA-2, it’s essential to install the sensor in a convenient location. The placement of the sensor must meet certain criteria, and it can be placed in multiple directions and orientations. Vibrations are generated on rotating machinery by internal cyclic forces. The vibration sensor measures the transmission of these forces through the machine’s structure. It can measure these forces and determine the exact cause of the vibrations.
The EVA-A Electronic Vibration Analyzer-2 has an auto-mode function, which allows you to set the tool to the proper mode. When this feature is enabled, the tool automatically detects vibrations and displays the resulting information. It also has a strobe light, which can be used to detect when propellershaft balance has been achieved. This helps the technician to make sure that the propellershaft is balanced.
The MyoVibe is an example of such an EVA tool. It detects the state of muscle activation and uses a HP filter to reduce noise. The MyoVibe also features a muscle activation detection module, which extracts frequency domain features from the remaining signal. These frequency domain features are important to the training decision tree model and the detection phase. If the k-EVA method is used, it will detect muscle activation with 93% accuracy.
Exposure limit values
To reduce vibration-induced health risks, employers should monitor the exposure limits of eva vibratory tools. In general, exposure limit values should not exceed the daily maximum amount of vibration. However, if the exposure exceeds the maximum daily value, engineering controls should be implemented. An exposure meter can help assess the vibration magnitude in real-world situations. Exposure limit values should not be exceeded unless the risk of injury is considered to be extremely low.
The most appropriate basis for determining exposure limits is a criterion developed by Acton and other experts. This criterion is based on the most rigorous published comparison of 1/3-octave band spectra. It also takes into account subjective effects. It is important to note that the exposure limit values are not necessarily the highest values. The exposure limit values should be adjusted to meet these limits.
The daily exposure limits for a long-reach sander should be interpreted in accordance with these guidelines. The interquartile range for vibration is three to four m/s2. However, preliminary data suggest that carpenters, painters, and other workers frequently exceed the daily exposure limit values. In such cases, controls must be implemented to lower vibration magnitude exposure. To minimize vibration-induced health risks, the following are recommended:
Occupational exposure limit values should be determined based on real-world measurements. Preliminary measurements should be conducted in the workplace, in several positions, and in the operator’s ear with the highest SPL value. Similarly, other body parts may be exposed to SPLs exceeding 137 dB. A comprehensive evaluation of the exposure limit values for eva vibration tool
About The Author
Mindy Vu is a part time shoe model and professional mum. She loves to cook and has been proclaimed the best cook in the world by her friends and family. She adores her pet dog Twinkie, and is happily married to her books.