INFICON Explorer Portable Gas Chromatograph - Manual (Page 170)

Method Development
168
4. Enter the desired Backflush time and click OK to accept the change and close
the dialog boxes.
The change you have made applies to the currently selected column only. If
you need to change the setting for another column, select the next column and
change the backflush time.
5. Save the assay.
Pump Time
The Pump Time is the duration the pump draws sample through the SAMPLE IN
port to flush and fill the sample loop. Set the pump time so that the sample loop is
allowed to flush with the sample before the sample is injected.
When Explorer changes the PID sensitivity (gain), it must monitor and change the
offset. This occurs during the pump time. Explorer begins to adjust the offset at
about 8-10 seconds into the pump time. Typical setting for the pump time do not
allow sufficient time for baseline stabilization after the extreme changes in offset
that occur during gain switching.
If it is necessary to switch gains between runs, set the pump times to at least 20
seconds. Use typical times of 10 to 15 seconds when no gain switching is required.
To change the detector sensitivity:
1. Select the Assay tab.
2. In the Method box, click Config .
3. Click Inject in the Configure dialog box.