To Bakeout The Npd - Agilent Technologies 8860 Maintaining

12 Maintaining the NPD

To Bakeout the NPD

To Bakeout the NPD

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.
1 Bakeout the NPD with the column installed or uninstalled. If uninstalled, gather the
2 Place GC in maintenance mode: Maintenance > Instrument > Perform Maintenance >
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.
3 Turn off the bead.
4 If the column is uninstalled, plug the detector connection with the column nut, and no-hole
5 Set normal operating flows.
6 Set the detector temperature at 25 °C above the typical method set-point temperature.
7 Set the oven temperature to 250 °C or 25 °C above the normal maximum operating
8 Hold at temperature for 15 to 30 minutes.
9 If the column is not installed in the NPD, install it. See
10 Restore the analytical method and allow the NPD to equilibrate at operating temperatures
11 Check the NPD leakage current. See
12 Start the NPD bead Auto Adjust process.
13 Exit maintenance mode. Select Maintenance > Instrument > Perform Maintenance >
Allow 1 to 2 hours for a new Blos bead to equilibrate.
202
following, see "Consumables and Parts for the NPD"
• Column nut
• No-hole ferrule
Maintenance Mode > Start Maintenance. Wait for the GC to become ready to continue (all
zones cooled to safe handling temperatures).
ferrule.
Maintain inert carrier gas flow through the column, or remove the column from the GC.
temperature. Do not exceed the column's temperature limit.
NPD" on page 189.
and flows for 10 to 30 minutes.
Maintenance Mode > Finished.
on page 186:
"To Install a Capillary Column in the
"To Check the NPD Leakage Current" on page 201.
Maintaining Your GC