MagTek InSpec 9000-2005 - Manual (Page 47)

Section 4. Data Presentations
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The Histogram chart, Figure 4-10, will always be centered at the optimum measurement for the
selected parameter, 100% for amplitude, 0% the size parameters, and .293 for start sentinel.
Figure 4-10 shows how the data may be skewed to one side, but the chart is still centered about
0%. Maximum and minimum data will tend to be skewed to one side.
Figure 4-10. Performance Histogram Chart - Bit Size