Stripchart recording is an important tool for analyzing complex data. It provides a visual means to easily digest extensive quantities of recorded information over long time periods. In most cases, the stripchart logging interval is relatively slow (e.g. 1 minute, or 5 minutes), to allow the coverage of many days or weeks.
Min, max, and average point logging at the slow interval rate provides one-cycle worst-case values, which is usually sufficient for most PQ issues such as voltage sags. An exception to this usage is cycle stripchart recording. With a cycle interval, data accumulation is much faster, but the time resolution is much higher. The use of the cycle interval is described here.
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