4Sample Gas Handling
Using the External Filter Unit
Agilent 990 Micro GC User Manual 47
Using the External Filter Unit
The male part of the filter must be hand-tightened into the female part, followed by a 1/8 turn with
a 7/16-inch wrench. See Figure 16. Orient the arrow on the female half of the filter toward the
fingertight fitting.
Replace the external filter unit at regular intervals. See Review the Packing List on page 35 for
part numbers.
For more information about the external filer, please refer to External Sample Filter Manual
(p/n G3588-90018).
Whenever possible, remove moisture from samples introduced to the Micro GC.
Figure 16. Heated injector connection
From
sample
Frit for external filter
(CP736735)
1/16-inch nut
1/16 inch nut and
front and back ferrule
Filter female
(CP736736)
Filter male
(CP736737)
To ”Sample In”
Micro GC
1/16-inch nut