Evaluation Techniques; Methods Of Evaluation - Satec Expertmeter EM720 Operation Manual

Appendix E EN50160 Evaluation and Recording

Evaluation Techniques

EN50160 Evaluation Counters

Methods of Evaluation

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Evaluation Counters and Evaluation Period
The EM720 uses a set of the evaluation counters for
collecting EN50160 statistics within a specified evaluation
period.
The evaluation period is the period of time within which
the meter collects statistical evaluation data. Supply
voltage characteristics can be evaluated on a weekly or
daily basis. The evaluation period being normally preset in
your meter to a week can be changed via the EN50160
Advanced setup.
At the end of the evaluation period, the meter records
collected statistical evaluation data to a log file, and then
clears the evaluation registers and counters so that each
evaluation period's statistics is stored in a separate
record.
You can upload and view the online statistics data via PAS
reports, using data collected since the beginning of the
present evaluation interval. You can also manually clear
the present contents of the counters though PAS before
starting your EN50160 evaluation.
Observation Period
The observation period is the period of time within which
the voltage characteristics shall be assessed to ensure
compliance with the standard. The observation periods
declared by the EN50160 may differ for characteristics for
which compliance limits are specified in the standard,
usually one week, and for those for which only indicative
values are provided, usually one year.
The EN50160 compliance reports produced by PAS provide
correct weekly and yearly observation statistics regardless
of the evaluation periods used for collecting data.
Whenever needed, PAS will aggregate records within a
number of the evaluation intervals to provide correct
observation periods. Some of the characteristics, like rapid
voltage changes or mains signaling voltage, may require
daily assessments. If you intend to use daily-evaluated
voltage characteristics, select the daily evaluation period
via the EN50160 Advanced setup.
This section describes methods used by the EM720 for
evaluating supply
compliance with the standard.
EM720 Power Quality and Revenue Meter
voltage characteristics to ensure