SPM leonova emerald, User Manual

Page: 65 / 170

General measurement functions
B:31
B
Multi-line symptoms with harmonics
The symptom register in Condmaster contains a number of symptoms searching for groups of lines.
These are of three kinds:
a harmonics of a single frequency line
b side bands to a single frequency line
c harmonics of a side band pattern.
Note that ‘harmonics’ are also called ‘multiples’ and ‘orders’. Alternative a) is illustrated on the pre-
vious page.
Damage on the rotating inner race of a bearing typi-
cally affects the line at the ball pass frequency over
the inner race (BPFI). Quite often it also produces
side bands to this frequency line. In Condmaster,
the symptom BPFIM (M = modulation) is configured
to show two sidebands on either side of the centre
line BPFI, which is not highlighted (F).
Adding the marker to the centre line of the patters
displays the position of BPFI and shows that it is
covered by its own symptom (G).
F
G