SKF Microlog Bump Test Module

A bump or rap test is a simple repeated impact test applied to a machine or product to excite the structure. This allows you to measure its natural frequencies. A bump test is carried out to determine if resonance is responsible for high noise or vibration levels.

Instrument settings are very similar to those for the Analyzer module. The difference is that the signal involved is not steady state and its magnitude will vary. Therefore, input amplifier auto-ranging cannot be used; the expected input range has to be set manually.  Read this application note for more information.