Siemens SM2 monitoring system, U3585-J-Z125-8-76 1 manual Measures for reducing the error sources

Accuracy of the SM2 data Notes on SM2 operation

6.2.3 Measures for reducing the error sources

From the above explanations, the following recommendations can be deduced; they should be observed if high importance is placed on the accuracy of the data.

1.Minimization of marginal problems

The monitoring cycles should be long but not too long. Short-term peak loads will not be detected if the monitoring cycles are too long because SM2R1 only supplies the total activity or the average value for the whole monitoring cycle.

All desired monitoring functions should be activated before (not during) the monitoring cycle.

Similarly, the desired monitoring functions should be kept active somewhat longer than the monitoring cycle. For later analysis with SM2R1 the desired monitoring cycle should be specified as the analysis period.

2.Reduction of the number of objects to be monitored

This reduces the induced system workload, which results in less falsification of the monitored system.

3.Sufficiently large number of samples

As a rule, this should be implemented not by increasing the sampling rate but by length- ening the monitoring cycle. The sampling rate should be increased only if the system workload permits or if it is not possible to lengthen the monitoring cycle.

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