A reading taken with a portable hand-held vibration meter is capable of indicating which of the following conditions?

Correct Answer: Option B — The unit being tested is operating normally.

Portable vibration meters measure overall vibration levels, such as velocity or displacement. These readings provide a general indication of whether the machinery is operating within established normal parameters. While they confirm normal operation, they lack the diagnostic capability to pinpoint specific internal component failures like bad bearings or rotors.