To Clean The Septum Seat In The Purged Packed Inlet - Agilent Technologies 7820A Manual

5
Maintaining the Purged Packed Inlet

To Clean the Septum Seat in the Purged Packed Inlet

WA RN IN G
C AU TI O N
70
Gather the following:
1
• Replacement septum (See
Purged Packed Inlet"
• Septum nut wrench
• 0- or 00-grade steel wool (optional)
• Tweezers
• Compressed, filtered, dry air or nitrogen
• Ultrasonic cleaning bath
• Lint-free gloves
Load the inlet maintenance method
2
become ready.
Be careful! The oven and/or inlet may be hot enough to cause
burns. If the inlet is hot, wear heat-resistant gloves to protect your
hands.
Remove the septum retainer nut or Merlin cap.
3
Loosen the top insert weldment and remove.
4
Wear clean, lint-free gloves to prevent contamination of parts with
dirt and skin oils.
Use tweezers to remove the septum or Merlin Microseal from
5
the top insert weldment. Do not gouge or scratch the interior
of the septum head.
Scrub the residue from the top insert weldment and septum
6
nut with a small piece of rolled-up steel wool and tweezers.
Ultrasonically clean the retainer nut and top insert
weldment.
Use compressed air or nitrogen to blow away the pieces of
7
steel wool and septum.
Wearing gloves, inspect the O-ring and replace, if necessary.
8
(See "To Change the O-Ring on the Purged Packed Inlet"
page 74.)
9 Install the top insert weldment and hand-tighten firmly.
"Consumables and Parts for the
on page 60.)
and wait for the GC to
Maintaining Your GC
on