INFICON Explorer Portable Gas Chromatograph - Manual (Page 183)

Explorer Operator Manual
181
3. Enter a value for the Slope Down sensitivity.
The Down Slope factor sets the point where the integration will end and
determine the area under the peak. This value can also range from 0.1 to 99.
Again typical values are set between 0.5 and 5 mV/S.
The Up and Down Slope sensitivities set here will be used by
Explorer as
default values. If Auto is selected Explorer will select its own values based on
the best results it can obtain for the current analysis. These values depend on
the amount of baseline noise and may change for every chromatogram.
4. The Integration Delay is used to delay the start of integration after the analysis
begins. It is used to prevent integration of peaks which may appear as a result
of pressure changes during sample injection, especially when large syringe
injections are made. If there are no pressure peaks, set the integrator delay to
zero. If you have more than 25 peaks in an analysis, integrator delay may be
used to determine which 25 peaks will be identified. If you are interested in the
peaks in the middle or at the end of the chromatogram, set the integrator delay
so that the first peaks are not used.
5. The Minimum Area is the minimum integrated area that must be detected in
order for Explorer to identify a compound and put it in the Peak Report. When
creating a method set the Minimum Area Factor to 0 initially so that all peaks
will be identified.
Peaks that do not meet the minimum area requirements will be labeled
Unknown.
6. The Minimum Height is the minimum peak height that will be accepted as a
sample peak.
This factor allows the integrator to eliminate peaks due to noise.
If manual integration is being used adjust the Minimum Height up or down
from the value set by the integrator to obtain the desired results.