Agilent Technologies 7820A Manual page 127

WA RN IN G
WA RN IN G
Maintaining Your GC
To avoid bending the inlet, always use two wrenches. Use a
5/16-inch wrench to support the inlet while tightening the column
nut with a 1/4-inch wrench.
Tighten the column nut an additional 1/4 turn with a wrench
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or until the column does not move.
11 If using an automatic injection system with a 0.25-mm or
0.32-mm column, verify that the column installation by
manually pushing the syringe into the inlet.
Configure the new column.
12
Condition the column per the manufacturer's
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recommendation. (See
Install the column into the detector. See:
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• To Install a Capillary Column in the FID
• To Install a Capillary Column in the NPD
• To Install a Capillary Column in the TCD
• To Install a Capillary Column in the µECD
After the column is installed at both inlet and detector,
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establish a flow of carrier gas and purge as recommended by
the column manufacturer.
Restore the analytical method.
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• For FPD, immediately turn off the flame.
• For NPD, immediately set the bead voltage to 0.0.
After the GC becomes ready, wait 10 minutes then ignite the
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detector flame or adjust offset on the NPD bead.
Be careful! The oven, inlet, and/or detector may be hot enough to
cause burns. If they are hot, wear heat-resistant gloves to protect
your hands.
Allow the oven, inlet, and detector to equilibrate at operating
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temperature, then retighten the fittings.
19 Reset the column EMF counters. See
Counter in the Operation Manual.
Maintaining the COC Inlet
To Condition a Capillary
To Reset an EMF
7
Column.)
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