Syscom Video MR3000C User Manual page 58

In case the Swiss regulation has been selected, the comparison is done on the Vector Sum and not
on each single axis. The algorithm defined by the norm and implemented in the MR3000C/TR is
the following:
1. Calculation of the Vector Sum of the event
2. Detection of the velocity peak of the Vector Sum. Let's call it Vmax.
3. Identification of the axis giving the largest contribution to Vmax.
4. Calculation of the dominant frequency related to this axis. Let's call it Fmax.
5. The parameters to consider for the comparison with the limit values are then Vmax and
Fmax.
If two axes have the same maximum value, then that with the lowest value of the dominant
frequency is considered.
Once chosen the desired reference curve, it is possible to see the values in the underlying table
(Fig. 4.4.5). Moreover, the alarm can be set as a curve having the same trend of the reference
norm selected but with reduced values. The reduction (in percentage) can be chosen from 1 to
100%. This option can be used for a lower alarm level, for example a warning level.
NOTE: In case the MR3000 has an internal accelerometer, the regulations implemented (DIN
4150-2, SN 640312, Circulaire du 23/07/1986) are not shown because all the limits are defined in
velocity and not in acceleration. The user-defined norm is always available.
MR3000CMR3000C_TR_v2.0_rev1.odt
Figure 4.4.6. Settings of the user-defined norm.
subject to technical change without notice
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