Maintaining the Purged Packed Inlet 6
Maintaining Your GC 95
5
Tighten the inlet column nut 1/4 turn with a wrench.
6 After conditioning, remove the column from the inlet.
7 Simultaneously insert the column into the inlet and
detector fittings but do not force it. It may be necessary to
start the long end of the column in the inlet at an angle to
clear the oven floor.
8 Withdraw the column 1 to 2 mm from both the inlet and
detector. Finger- tighten both column nuts.
9 Tighten both column nuts 1/4 turn with a wrench.
10 Press [Config], [Column 1] or [Column 2], enter 0.00 in either
Length or Diameter, and identify the inlet and detector to
which the column is connected.
11 Establish a flow of carrier gas and purge as recommended
by the packing manufacturer. Generally:
• 20 to 30 mL/min for 2- mm id glass or 1/8- inch od
metal columns
• 50 to 60 mL/min for 4- mm id glass or 1/4- inch od
metal columns
12 Restore the analytical method.
• For FPD, immediately turn off the flame.
Do not use hydrogen as the carrier for conditioning! It could vent
into the oven and present an explosion hazard.
Overtightening the column nut or forcing it to bottom in either the
inlet or detector may shatter the column.
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