Bump Test vbSeries
Note: This feature is not available on the vb5 or vb6 instrument models.
The bump test is a useful vibration analysis technique to help identify resonance frequencies in a machine's structure. It requires ‘bumping' (i.e. hitting) the machine structure when the machine is stopped, while taking a peak hold measurement. Careful selection of the mallet or hammer is required along with the strength and direction of the bump to ensure that suitable frequencies are injected into the structure without causing damage.
- From the Main Menu press
Measure and use the left-hand arrow keys to highlight Bump Test then press 
. - Use the left-hand arrow keys to select a parameter set or press
to create a new one and set the parameters as required. - Press to begin sampling and 'bump' the machine with a hammer. Repeat several times.
Bump test measurements are taken in free run mode and use peak hold averaging. The instrument will take continuous samples and update the peak value for each spectral line whenever a line exceeds its previous value.
Last Reviewed: 11/Jun/2009 Source: vbSeries Reference Guide Revision 24 March 2009 - pages 72 & 73