Agilent Technologies 6850 Series II User Information page 183

12. When the system is leak-free, restore normal connections and operating
Correcting leaks
Materials needed:
•
•
1.
2.
If the pressure drop is now less than 0.3 psi, you can consider the inlet system
leak-free. If the pressure drops faster than the acceptable rate, continue to
search for leaks and repeat the pressure test. If all fittings appear to be leak
free, but the inlet system is still losing too much pressure, you may need to
replace the inlet manifold.
Potential leak points
Check the following areas (as applicable) when checking an inlet system for
leaks.
•
•
•
•
•
•
•
•
•
•
•
•
Released: March 2004
conditions.
Electronic leak detector suitable for the gas type
Tools to tighten parts of the inlet that leak (if leaks are detected)
Use an electronic leak detector to check all areas of the inlet that are
potential sources of a leak.
Tighten loose connections to correct leaks, if necessary. You may need to
repeat the leak test.
The plugged column connection
The septum and/or septum nut
The cooling tower assembly
¼
The -inch ferrule (if a liner is used)
The O-rings and connections
The area where gas line(s) are plumbed to the inlet
The capped purge vent
The knurled nut
The septum purge cap (septum head only)
The connections for the carrier gas and septum purge (septum head only)
The lower inlet seal at the bottom of the inlet
The inlet bottom cap
6850 Series II GC User Information
Routine Maintenance: Inlets
Maintaining a cool on-column inlet
page 183 of 256