To Perform An Nci Autotune (Methane Reagent Gas) - Agilent Technologies 5977B Series Operating Manual

To Perform an NCI Autotune (Methane Reagent Gas)

Always verify MSD performance in EI before switching to CI operation. (See
C A U T I O N
EI System Performance"
as the reagent gas first, even if you are going to be using a different reagent gas or
going to run NCI.
Procedure
1 From the Tune and Vacuum Control view, load NCICH4.U (or an existing tune
2 From the Setup menu, select the CI Tune Wizard and follow the system
3 Under the Tune menu, click CI Autotune.
Avoid tuning unless absolutely necessary; this will minimize PFDTD background noise
C A U T I O N
and help prevent ion source contamination.
There are no tune performance criteria. If autotune completes, it passes. (See
Figure 45
you may not be able to acquire data successfully if your method sets EMV to
"+400" or higher.
5977B Series MSD Operating Manual
file for the reagent gas you are using).
prompts.
Accept the default temperature and other settings.
If you use an existing tune file, be sure to save it with a new name if you
don't want to overwrite the existing values.
on page 138.) If the tune sets the EMV at or above 2,600 V, however,
on page 108.) Always set up the CI MSD in PCI with methane
Operating in CI Mode
"To Verify
5
137