Performing The Leak Test-Manual Inlets - Agilent Technologies 6890 Series Service Manual

230 Cool On-Column Inlet
Leak testing EPC and manual inlets
Performing the leak test—manual inlets
Note Be sure that the preparation steps on pages 10 and 11 are complete before
proceeding with this test.
1. Turn the pressure controller clockwise until the column head pressure
reaches 25 psi.
2. Wait 10 minutes for pressure equilibration. The gauge on the front panel
should be stable.
3. After 10 minutes, shut off the column head pressure by turning the
pressure controller full counter-clockwise.
Pressure gauge
Pressure regulator
Figure 230-9
4. Monitor the pressure gauge for 5 minutes.
•
•
5. When the system is considered leak tight, the caps may be removed, the
column reinstalled, and the desired pressure set.
14 of 20
ON-COL
Inlet manifold
If there is less than 0.5 psi pressure loss (approximately 0.1 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
Jun 2001