Varian 450-GC, User Manual

Page: 110 / 205

Injectors – 1177 Split/Splitless Capillary Injector
Page: 172 User Manual 450-GC Varian, Inc.
3. Unscrew the 2 captive screws holding the top
of the Injector to the base. Carefully move this
assembly upwards and to one side. The
Septum purge line and carrier gas supply lines
may hinder movement of the top piece
somewhat.
When using a CP-8400 Aut oSampler, remove the Injecto r access plate
by removing t he 2 retaining screws and firmly l ifting the plate. It may be
hot if another Injector is also installed and powered. The plate may be a
littl e tight, do not force it off. Lift st raight up, a slight back and forth
rocking may help remove it.
4. Use a laboratory tissue to grasp the glass
insert and remove it from the Injector body.
Replace the Glass Insert
Follow these steps to replace the glass insert in the 1177 Injector.
1. Using tweezers or clean lab tissue, carefully slide the new insert into the
Injector body. Place a new seal over the insert.
2. Carefully place the top of the Injector over the insert. Tighten the 2 captive
screws alternately for uniform sealing. Note that placing the top piece onto
the body may take some care since the gas supply line and septum purge
lines may have minor resistance to movement.
3. Install a new septa, place the Injector nut on the Injector and tighten by
hand until you feel some resistance, then tighten an extra 1/4 turn using the
Injector nut wrench.
Af ter the Inject or nut h as been rep laced, check t he spl it vent and
septum purge flow rates to ensure these values have not changed.
4. Condition the insert by setting the 1177 Injector to the split mode and
purging with carrier gas for 30 min at 300
°
C.