6
Operating in CI Mode
To Perform an NCI Autotune (Methane Reagent Gas)
5977B Series MSD Operating Manual
161
To Perform an NCI Autotune (Methane
Reagent Gas)
Procedure
1
From the
Tune and Vacuum Control
view, load
NCICH4.U
(or an existing tune
file for the reagent gas you are using).
2
From the
Setup
menu, select the
CI Tune Wizard
and follow the system
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.
3
Under the
Tune
menu, click
CI Autotune
.
There are no tune performance criteria. If autotune completes, it passes. (See
on page 162.) If the tune sets the EMV at or above 2,600 V, however,
you may not be able to acquire data successfully if your method sets EMV to
“+400” or higher.
CAUTION
Always verify MSD performance in EI before switching to CI operation. (See
“To Verify EI System Performance”
on page 131.) Always set up the CI MSD in
PCI with methane as the reagent gas first, even if you are going to be using a
different reagent gas or going to run NCI.
CAUTION
Avoid tuning unless absolutely necessary; this will minimize PFDTD
background noise and help prevent ion source contamination.
Summary of Contents for 5977B CI MSD
Page 1: ...Agilent 5977B Series MSD Operating Manual ...
Page 12: ...12 5977B Series MSD Operating Manual ...
Page 34: ...1 Introduction To Replace the Primary Fuses 34 5977B Series MSD Operating Manual ...
Page 142: ...5 Operating in EI Mode To Pumpdown the MSD 142 5977B Series MSD Operating Manual ...
Page 252: ...8 CI Maintenance To Install the CI Source 252 5977B Series MSD Operating Manual ...
Page 253: ......