Agilent Technologies 6890 Series Service Manual page 64

5. Turn the column head pressure controller an additional half turn
clockwise to assure that it will be closed and monitor the column head
pressure gauge for 10 minutes.
•
•
6. When the system is considered leak tight, the caps may be removed, the
column reinstalled, and the split flow and column pressure may be set.
Jun 2001
If there is less than 0.5 psi pressure loss (approximately 0.05 psi/
min), consider the system leak tight.
If pressure loss is much greater than 0.5 psi, there is a leak that must
be found and corrected. See Correcting leaks later in this section.
Inlets
Agilent 6890 Gas Chromatograph Service Manual
Split/Splitless Inlet
Leak testing—EPC and manual inlets
210
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