Manfred Weber
Metra Mess- und Frequenztechnik in Radebeul e.K.
PC Vibration Measurement System VibroMetra

Monitoring of measuring results

Mass changes during the test runs need to cause significant changes of rotor vibrations. VM-BAL will indicate problems by insufficient changes as shown below:
Monitoring of measuring results


1. Warning
Reliable unbalance calculation cannot be performed if the results of the test runs are too similar.

Reason 1

2. Reason 1
A possible reason is that you might have forgotten to do the calculated  mass changes of plane A or plane B at the actual rotor.
Click this button to discard the measuring run and to start a new one after you have done the mass changes.

Reason 2

3. Reason 2
The test mass might have been too small. Use a test mass with higher weight.

Reason 3

4. Reason 3
Vibrations of other sources with similar frequencies may interfere with the balancing process. You may repeat the measurement with a higher number of revolutions.


5. Ignore
If none of the above reasons applies or no changes are possible you may skip this warning. Please keep it in mind, however, for the evaluation of the balancing results.