Agilent Technologies G7035A, Operation Manual

Page: 96 / 172

96 5977 Series MSD Operation Manual
4
Operating in Chemical Ionization (CI) Mode
To Switch from the Standard or Inert EI ion source to the CI Ion Source
Procedure
1
Vent the MSD. See “To Vent the MSD” on page 76.
2
Open the analyzer. See “To Open the Analyzer Chamber” on page 78.
3
Remove the EI ion source. See “To Remove the EI Ion Source” on page 128.
4
Install the CI ion source. See “To Install the CI Ion Source” on page 167.
5
Install the CI/Extractor interface tip seal (p/n G3870-20542). See “To
Install the CI/Extractor Interface Tip Seal” on page 155.
6
Close the analyzer. See “To Close the Analyzer Chamber” on page 80.
7
Pump down the MSD. See “To Pump Down the MSD in CI Mode” on
page 98.
C A U T I O N
Always verify MSD performance in EI before switching to CI operation.
Always set up the CI MSD in PCI first, even if you are going to run NCI.
C A U T I O N
Electrostatic discharges to analyzer components are conducted to the side board
where they can damage sensitive components. Wear a grounded antistatic wrist strap.
See
“Electrostatic discharge” on page 123. Take antistatic precautions
before
you open
the analyzer chamber.