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

220 Purged/Packed Inlet
Leak testing—EPC and manual inlets
Performing the leak test—manual inlets
Note Be sure to complete all of the preparation steps on pages 10 and 11 before
continuing.
1. Set the carrier supply pressure to 30 psi.
2. Turn the flow controller about six turns counter-clockwise. The pressure
gauge will increase to a value less than the supply pressure.
3. Wait 10 minutes for pressure equilibration. The gauge on the front panel
should be stable.
4. After 10 minutes, shut off the column head pressure by turning the flow
controller full clockwise. Do not overtighten or you will damage the valve
seat.
Pressure gauge
Flow controller
Figure 220-11
5. Monitor the pressure gauge for 10 minutes.
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Inlet manifold
If there is less than 0.7 psi pressure loss (0.07 psi/min), consider the
system leak tight.
Inlets
Agilent 6890 Gas Chromatograph Service Manual
Jun 2001