When should acceleration be used for testing?

Using acceleration for testing is most appropriate above 2000 Hz due to the nature of vibration behavior at higher frequencies. In industrial applications, higher frequency vibrations often indicate problems such as imbalance, misalignment, or bearing issues in machinery. Acceleration measurements are sensitive to these rapid changes in motion, capturing the peaks of vibration effectively.

When testing at frequencies above 2000 Hz, the dynamic response of the equipment can result in more critical and precise insights regarding operational issues, as the accelerative forces become more pronounced. This sensitivity allows for better detection of faults, which is essential for maintaining equipment health and preventing failures.

In lower frequency ranges, such as those found in the other options, different measurement parameters like velocity or displacement may be more appropriate. These methods yield better insights into the condition and behavior of machinery operating at those frequencies, making acceleration less relevant in those cases.