To Bakeout The Fid - Agilent Technologies 8860 Maintaining

9 Maintaining the FID

To Bakeout the FID

To Bakeout the FID

1 Bakeout the FID with the column installed or uninstalled. If uninstalled, gather the following,
Be careful! The detector may be hot enough to cause burns. If the detector is hot, wear
WAR N IN G
heat-resistant gloves to protect your hands.
2 If the column is uninstalled:
If using hydrogen as a carrier gas, turn off the hydrogen supply and cap the end of the column
WAR N IN G
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
8 Hold at temperature for 30 minutes or until the baseline settles at a lower value. The
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
11 If the column is not installed in the FID, install it. See
Maintaining Your GC
see "Consumables and Parts for the FID"
• Capillary adapter (adaptable FID only)
• Column nut
• No-hole ferrule
a Cool the GC oven and detector
b Plug the detector connection with the capillary adapter, column nut, and no-hole
ferrule
temperature. Do not exceed the column's temperature limit.
baseline will typically rise, then fall to a final value lower than the initial baseline.
Agilent service representative.
Without a column installed, a clean system baseline should be < 20 pA.
FID" on page 144.
on page 140:
"To Install a Capillary Column in the
161