Operating in Chemical Ionization (CI) Mode 4
5977 Series MSD Operation Manual 109
To Switch from the CI Ion Source to the Standard or Inert EI Ion Source
Procedure
1 From the Tune and Vacuum Control view, vent the MSD. See “To Vent the
MSD” on page 76. The software will prompt you for the appropriate
actions.
2 Open the analyzer. See “To Open the Analyzer Chamber” on page 78.
3 Remove the CI/Extractor interface tip seal. See “To Install the CI/Extractor
Interface Tip Seal” on page 155.
4 Install the EI ion source. See “To Install the EI Ion Source” on page 150.
5 Place the CI ion source and interface tip seal in the ion source storage box.
6 Pump down the MSD. See “To Pump Down the MSD in EI Mode” on
page 84.
7 Load your EI tune file.
CAUTION
Always wear clean gloves while touching the analyzer or any other parts that go inside
the analyzer chamber.
CAUTION
Electrostatic discharges to analyzer components are conducted to the side board
where they can damage sensitive components. Wear a grounded antistatic wrist strap
and take other antistatic precautions before you open the analyzer chamber.
See “Electrostatic discharge” on page 123.
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