A SERVICE OF

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Preventive Maintenance
Split/splitless capillary inlets
165
Leaks
For proper inlet operation, it is essential the entire system be leak•tight.
The following procedure should be performed in initial checkout, or any
time a leak is suspected.
1. Switch off detector!
2. Install an inlet plug (a paper clip or similar•gaugewire) in the same
manner as a capillary column.
Capillary Inlet Plug Installed for Leak Test
Figure 8-5
3. Adjust the split•flowflow controller to about 60 ml/min.
4. Adjust or set the column head pressure to obtain a column pressure
of 138 kPa (20 psi).
gold
2 0
ENTER
Set inlet B pressure to 20 psi.
INJ B PRES
5. Shut off septum purge or cap the septum purge vent with a suitable
swagelok fitting. Verify that it is shut off with a soap film (bubble)
flow meter.