What should be observed when comparing vertical and horizontal vibration readings?

When analyzing vibration readings, the closeness in amplitude between vertical and horizontal measurements is crucial because it gives insights into the dynamic behavior of machinery. If the vibration amplitudes in these two planes are similar, it generally indicates that the machine is balanced and operating correctly. Conversely, significant discrepancies may point to alignment issues, imbalances, or issues within the mounting or foundation of the equipment.

While frequency, temperature, and time of the readings can also provide valuable information during vibration analysis—such as diagnosing operational conditions or tracking changes over time—they do not directly indicate the machine’s balance and immediate mechanical state as effectively as amplitude comparison does. Monitoring amplitude specifically helps in assessing overall machine health and identifying potential faults, making it a key focus in vibration analysis.