The Peak valley matrix DataMode™ stores multiple channels of peak valley reversal histograms in the output data file. The CX23-R/eDAQXR acquires peaks and valleys from triggered or un-triggered time history data streams using the user-defined hysteresis value and the peak valley processing algorithm. The resulting peak valley stream defines the set of peak valley reversals which are histogrammed using the user-defined options for the type and size of histogram.
NOTE
When a large number of channels are selected for a DataMode, the GUI responsiveness can become sluggish. Typically with 500 channels or less, this is not overly intrusive to usability. However, if more than 500 channels are required for any given DataMode, it is recommended that users consider splitting the channels across multiple DataModes when possible; otherwise, users will need to be patient in regard to the GUI response when assigning or editing any of the DataMode parameters.
NOTE
The cumulative size of all histogram matrices across all Rainflow, Peak Valley Matrix and Time at Level DataModes is limited to 650 MB. See SIE file size issues about storage area for histogram DataModes.
DataModes options
After initializing, the peak valley processing algorithm alternates searching for peaks and valleys based on the user-defined hysteresis. There are three states of the algorithm - initialize, peak search and valley search.