INFICON Explorer Portable Gas Chromatograph - Manual (Page 111)

Explorer Operator Manual
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2. Open the .PID or .ECD file containing the chromatogram run on the currently
selected column.
When you select a compound in the library, the compound matching the library
retention time will be selected in the reference chromatogram. Three dashed,
blue lines will display the current window percent around the peak.
3. To change the window percent value for the selected compound, move the
crosshair onto one of the outer lines and drag the line closer or further from the
peak. When you release the mouse button the window percent will be updated
accordingly.
You can also set the window percent by entering an exact value in the
compound information box.
Setting the window percent may require some practice. If the window percent
is too small, the peak may drift out of the window and the compound may not
be identified. If you set the window percent to high, your peak may be
misidentified.
Compound Library
A compound library is supplied for each column/detector pair required for the assay.
The number of libraries is determined by the assay. These libraries have been
determined for the assay standard method. The libraries are always available on the
assay disk so you can use the original method and the information in the library.
When you open an assay you will open a copy of the library. Once it has been
opened in SiteChart, it becomes the current library. You can edit it and update it as
required by your application. If you modify the current library in any way, you must
save the assay.
If the method is changed, the reference libraries are no longer valid and will
automatically be deleted from SiteChart. Refer to the assay notes for details of the
reference library and the associated method.