To Perform A Ss Pressure Decay Leak Test; To Perform A Ss Inlet Pressure Decay Test At The Gc Keyboard - Agilent Technologies 7890 Series Troubleshooting Manual

7
Checking for Leaks

To Perform a SS Pressure Decay Leak Test

To perform a SS inlet pressure decay test at the GC keyboard

138
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
Perform an Inlet Leak Check
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
• Check the plugged column fitting and septum purge cap.
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
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:
and To Perform a SS Split Vent
Inlet".
"To Check for External
Agilent 7890 Series Troubleshooting
To
Leaks".