Operating in Chemical Ionization (CI) Mode 4
5975 Series MSD Operation Manual for MassHunter 121
To Switch from the CI Source to the EI Source
Procedure
1 From the Tune and Vacuum Control view, vent the MSD. See page 85. The
software will prompt you for the appropriate actions.
2 Open the analyzer.
3 Remove the CI interface tip seal. See page 164.
4 Remove the CI ion source. See page 162.
5 Install the EI ion source. See page 154.
6 Place the CI ion source and interface tip seal in the ion source storage box.
7 Pump down the MSD. See page 95.
8 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 page 137.
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