INFICON Explorer Portable Gas Chromatograph - Manual (Page 261)

Explorer Operator Manual
259
Updating Assays
Due to the nature of gas chromatography, it is necessary to update the assay
information periodically. If you are using a single assay and calibrating the
instrument daily this will not be too difficult. If you are using more than one assay, it
becomes more important to update the assays that you do not use frequently. If this
is done you will be able to load the assay when it is required and calibrate the
instrument quickly.
If the assays are not maintained, then you will need to update all the library
information before you will be able to accurately calibrate each assay library.
Although this is not difficult, it can be time consuming. If the instrument is to be
used on short notice, it is imperative that you update your assays on a monthly basis
or more frequently as necessary.
In order to update the assay you must have calibration gas for each assay. If you
have customized an assay for a specific application you may only need to update
your custom assay. If on the other hand, you may need all the assay compounds at
some time in the future you must update all assay compounds. In either case, the
calibration gas must contain all the compounds of interest.
NOTE: Always update the copy of the assay that is saved on your local drive. Do not update
the original disk.
Updating Compound Retention Time and Response
The following procedure will update retention time and response information for
each library compound. Response information will be updated based on the single
concentration contained in the calibration gas.
NOTE: This procedure is performed with the SiteChart software, see the chapter starting on
page 99, for more information.
1. You must use a PC and the SiteChart software to update the assays.
2. Turn Explorer on.