INFICON Explorer Portable Gas Chromatograph - Manual (Page 196)

Method Development
194
2. Press PROBE. Use the up and down arrow keys to select the desired probe.
The short probe is a 6” (15 cm) Teflon probe. The long probe is the three meter
sample line. The telescoping sample probe is 2 m long and has an extension
handle.
3. Press Enter Menu to confirm your selection and then press Exit to close the
box and return to the menu.
4. Press Enter Menu to close the menu.
If you need finer control of the pump time you can adjust the time to suit your
method. Another consideration when setting the pump time is the PID sensitivity.
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 that
occur during gain switching.
If it is necessary to switch gains between runs, set the pump times to at least 20. Use
typical times of 10 to 15 seconds when no gain switching is required.
1. Press Enter Menu, SETUP, CONFIG, COLUMN.
2. Select the column for which you want to alter the pump time. Disable the other
columns.
3. Press Exit to close the box. Press Enter Menu to close the menu.
4. Press Enter Menu, SETUP, CONFIG, METHOD, TIMING, and PUMP.
5. Use the arrow keys to enter the new pump time. Press Enter Menu.
6. If you need to change the pump time for the other two columns, repeat this
procedure for each column.
7. When you have changed the pump time for each column, enable all the
columns required for your method.