Operating in CI Mode 5
5977B Series MSD Operating Manual 127
To Operate the Reagent Gas Flow Control Module
Procedure
1 In the Manual Tune dialog, click the CI Gas tab to access the parameter
settings for controlling the CI gas flow. (See Figure 41.)
After the system has been switched from EI to CI mode, or vented for any other reason,
the MS must be baked out for at least 2 hours before tuning.
Continuing with CI autotune if the MS 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 41 Manual tune CI tab
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