9 Maintaining the FID
To Bakeout the FID
Maintaining Your GC 161
To Bakeout the FID
1 Bakeout the FID with the column installed or uninstalled. If uninstalled, gather the following,
see “Consumables and Parts for the FID” on page 140:
• Capillary adapter (adaptable FID only)
• Column nut
• No-hole ferrule
Be careful! The detector may be hot enough to cause burns. If the detector is hot, wear
heat-resistant gloves to protect your hands.
2 If the column is uninstalled:
a Cool the GC oven and detector
b Plug the detector connection with the capillary adapter, column nut, and no-hole
ferrule
If using hydrogen as a carrier gas, turn off the hydrogen supply and cap the end of the column
to prevent an oven explosion.
3 Maintain inert carrier gas flow through the column, or remove the column from the GC.
4 Set the detector temperature at 350 to 375 °C.
5 Set normal operating flows.
6 Light the FID flame.
7 Set the oven temperature to 250 °C or 25 °C above the normal maximum operating
temperature. Do not exceed the column’s temperature limit.
8 Hold at temperature for 30 minutes or until the baseline settles at a lower value. The
baseline will typically rise, then fall to a final value lower than the initial baseline.
9 Restore the analytical method and allow the FID to equilibrate.
10 Check the FID output value. It should be lower than the first reading. If it is not, contact your
Agilent service representative.
Without a column installed, a clean system baseline should be < 20 pA.
11 If the column is not installed in the FID, install it. See “To Install a Capillary Column in the
FID” on page 144.
To Next Page
Loading...
Need help?
General
