Daily Operation
To start up the GC
Released: March 2004 6850 Series II GC User Information page 51 of 256
Daily Operation
To start up the GC
1. Open the oven lid and verify that the correct column is installed.
2. Turn the carrier and detector gases on at their sources.
3. If cryogenic cooling is used, turn the cryo coolant on.
4. If the oven has been cold for some time, the column fittings may have
begun to leak. Check the fittings, tighten them if necessary, and close the
oven.
5. Turn the GC power switch on. Wait for initialization to finish.
6. Load the correct method. Wait for the GC to become ready.
7. When doing trace analysis with temperature programming, make a blank
run (no sample injected) to flush out materials from the carrier gas that
have accumulated on the column.
8. Begin running analyses.
To make a run
Load the desired method.
Manual syringe injection
1. When the "Ready for manual inj" message appears, insert the syringe
needle through the septum as far as it will go, press the plunger down
quickly, press Start, and withdraw the syringe immediately.
2. If the Not Ready light stays on, examine the GC display for a message. It
may be necessary to press the Prep Run key. If so, a message will say so.
Press the key, wait for the Not Ready light to turn off, then make the
injection and press Start.
Auto injector without a sequence
1. Load the sample into a sample vial. Place the sample vial in position 1 of
the injector turret. The Not Ready light can be on at this time. The "Ready
for autoinject" message appears when the GC is ready, but it is not
necessary to wait for this.
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