Chapter 10
Ensuring Tightness
Keeping Leaks under Control
180
Maintenance and Troubleshooting Manual
Keeping Leaks under Control
In this chapter you will find instructions about the operations needed to keep
under control the tightness of your chromatographic system. The sequences of
operations to be used to find and correct possible leaks in the system are organized
according to the possible instrument configurations (i.e. the type of column
installed and the type of gas control system).
If the Leak Test (or any significant symptom) has notified a possible leak in the
system you should:
•
Locate the leaks from the carrier gas inlet to the detector base body.
•
Check the accessible, critical connections (column to injector, column to
detector, split and purge valves, septum caps).
A possible leak source may be the gas bottles/gas chromatograph connections.
Check these lines before the others, if specific symptoms indicate that the leak is
outside the gas chromatograph.
DCC-equipped systems
TRACE GC Ultra, equipped with a DCC (Digital Carrier Control) module
features a new user interface menu which guides the user through a sequence of
operations necessary to correctly keep under control the pneumatic conditions of
the GC system. In particular an assisted
Leak Check
procedure is available to
easily verify the tightness of the system.
Leak Check
Perform the
Leak check
at the desired pressure following the instructions reported
in
Performing a Leak Check (Capillary Column)
operating sequence.
