138 Agilent 7890 Series Troubleshooting
7 Checking for Leaks
To Perform a SS Pressure Decay Leak Test
Use the Agilent Instrument Utilities Split/Splitless Inlet
Pressure Decay Test to determine if the inlet is leaking. Open
the software, select the GC, and run the test for the inlet. See To
Perform an Inlet Leak Check and To Perform a SS Split Vent
Restriction Test.
If the Instrument Utilities software is not available, see the
procedure below.
If the test fails:
• See “To Check for Leaks in a Split/Splitless Inlet”.
• Check the plugged column fitting and septum purge cap.
To perform a SS inlet pressure decay test at the GC keyboard
The pressure decay test checks for leaks from the inlet flow
module up to the column fitting.
After performing maintenance, first check for leaks in
externally accessible areas. See “To Check for External Leaks”.
If a leak is known to exist, check the externally accessible inlet
fittings first, especially any connection that has seen recent
maintenance, such as the septum nut, column adapter, column
connection, and so forth.
The pressure decay leak test described below requires removing
the column and capping the inlet column fitting. This test
can/cannot find the following types of leaks:
To Next Page
Loading...
Need help?
General
