5 Operating in CI Mode
To Operate the Reagent Gas Flow Control Module
5977C GC/MSD Operating Manual 123
To Operate the Reagent Gas Flow Control
Module
Procedure
1 In the Manual Tune dialog, click the CI tab to access the parameter settings
for controlling the CI gas flow. (See Figure 40.)
After the system has been switched from EI to CI mode, or vented for any other
reason, the MSD must be baked out for at least 2 hours before tuning.
Continuing with CI autotune if the MSD has an air leak or large amounts of
water will result in severe ion source contamination. If this happens, you need
to vent the MSD and clean the ion source.
Figure 40 Manual tune CI tab
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