Measurement Testing

Mjr · Site Admin Joined: 13 Jul 2005 Posts: 294

The best way to determine if you have a bearing problem is to analyze the spectrum, trend the data and look for changes; then you can set your limits as to what is acceptable. If you have the spectrum, you can check the individual bearing fault frequencies and look for spikes that will indicate any problems. If you have been trending and the levels have remained fairly consistant, then those levels probably are ok.

Some terms:

dBm -- a meaurement of the impacting occuring in the bearing, other companies such as FAG Industrial Services and CSI use "envelope demodulation" to measure the same thing, but the units are different and it is very difficult to compare one to the other.