Which of the following is not a cause for inaccurate vibration analysis results?

In the context of vibration analysis, proper sensor mounting is crucial for obtaining accurate results. When a sensor is mounted correctly, it ensures that the vibrations from the machinery or equipment are transmitted effectively to the sensor without any interference or alteration. Proper mounting allows for a direct and reliable measurement of vibrations, which is essential for insightful analysis.

In contrast, factors such as inaccurate sensor type, test load variations, and temperature changes can lead to significant inaccuracies in vibration analysis. For instance, using the wrong type of sensor may not capture the correct vibration frequencies or amplitudes. Similarly, variations in test load can alter the vibration characteristics of the machinery being analyzed, while temperature changes can affect the sensor's performance and the material properties, thus skewing the results. Therefore, ensuring that the sensor is mounted properly is a foundational element that contributes to accurate vibration analysis results.