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MON20/20 Software for Gas Chromatographs User Manual
SEPTEMBER 2010 3-9000-745
4-25
The following table describes the integration-related parameters that are
available on the timed events window.
Parameter Description
TEV Type The type of integration event. You have the following options:
• Inhibit: Set to Off to start a peak; set to On to end a peak.
• Integrate: Set to On and Off to set a region in which the area under the trace is
computed as a peak regardless of peak onset discovery. The resulting area is added to
the raw data as a peak with the retention time set to the Integration Off time.
• Summation: Set to On and Off to set a region in which the area of all peaks found will
be added together to create a single, larger, peak. The peaks that contribute to the
summation are marked as partial peaks in the raw data table, and the summation
total is added to the raw data as a new peak with the retention time set to the
Summation OFF time.
• Slope Sens: The peak starts when the slope of six consecutive points is greater than
the slope sensitivity value that is displayed in the Value column; the peak ends when
the slope of six consecutive points is less than the slope sensitivity value that is
displayed in the Value column.
• Peak Width: Each point displayed on the graph represents the average of N raw data
points, where N is the value displayed in the corresponding Value column.
• Single Base: Determines how the baseline is drawn under a peak.
• Off: The baseline is drawn from the point of peak onset to the point of
peak termination. This is not necessarily horizontal and if fact usually
has a slight slope. (Default)
• Bgn: Draws a horizontal baseline from the point of peak onset to a point
above or below the peak termination.
• End: Draws a horizontal baseline from a point above or below the peak
onset to the point of peak termination.
• Fused Ovrrd: Determines how the baseline is drawn when two or more peaks are
'fused' together.
• Off: A single baseline is drawn from the onset of the first peak of the
fused group to the termination of the last peak of the group. (Default)
• On: Causes a separate baseline to be drawn for each peak in the fused
group.
• Negative Peak: Determines whether peak detection will detect inverted peaks, which
are peaks that point downward from the baseline. At any given moment we can
detect positive or negative peaks but not both at once.
• Off: Detect positive peaks. (Default)
• On: Detective negative peaks.
• SW Auto Zero: Re-baselines the trace at the specified time for the specified detector.
Used after a FID gain change event or a spectrum gain change event.
Note: The Single Base and Fused Override events can act together to produce
multiple horizontal baselines, at different heights, for a fused peak group.