Emerson Machinery Health AMS 6300 SIS Operating Manual page 106

Overspeed protection system
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Configuration
February 2023
Note
Set the symmetry to 1% if the calculated symmetry is less than 10%. The noise pulse filter
has the widest passband at this setting. This is valid, independently if the symmetry has
been calculated by means of the TTL signal or based on the trigger wheel dimensions. Set
the symmetry to the same value for all three channels.
Figure 5-32: Trigger wheel with rectangular tooth profile - symmetry 50%
A. Tooth width = Gap width (B-A)
B. Tooth width + Gap width
Figure 5-33: Trigger wheel with rectangular tooth profile - symmetry 20% (tooth <
gap)
A. Tooth width < Gap width (B-A)
B. Tooth width + Gap width
Figure 5-34: Trigger wheel with rectangular tooth profile - symmetry 20 (gap < tooth)
A. Gap width < Tooth width (B-A)
B. Tooth width + Gap width
106
Operating Manual
MHM-97442
MHM-97442, Rev. 2.06

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