7CI Maintenance
To Switch from the CI Source to the EI HES
5977C GC/MSD Operating Manual 211
To Switch from the CI Source to the EI HES
Procedure
1 Vent the MSD. (See“Venting the MSD” on page 88.) The software will prompt
you for the appropriate actions.
2 Open the left side access panel. (See“To Open the MSD Covers” on page 108.)
3 Open the analyzer chamber door. (See“To Open the Analyzer Chamber” on page 149.)
4 Remove the CI source. (See“To Remove the CI Source” on page 217.)
5 Place the CI source in the storage container.
6 Remove the CI source radiator. The Radiator should not be removed or
installed with the CI source in place. (See“To Remove the CI Source
Radiator” on page 212.)
7 Place the CI source radiator in the storage container.
8 Loosen the column nut and remove the column from the GC/MSD Interface.
9 Cut the column on the tapered side of the ferrule to remove the ferrule.
10 Install the column into the GC/MSD interface extending 4 to 5 mm past the
analyzer end of the transfer line. (See“To Install a Capillary Column in the
GC/MSD Interface Using the Self-Tightening Column Nut” on page 42
or“To Install a Capillary Column in the GC/MSD Interface Using a Standard
Column Nut” on page 47.)
11 Remove the EI HES radiator from the storage container.
12 Install the EI HES radiator. (See“To Install the EI HES Radiator” on page 214.)
13 Remove the EI HES from the storage container.
14 Install the EI HES. (See“To Install the EI HES” on page 168.)
15 Pumpdown the MSD. (See“To Pumpdown the MSD” on page 112.)
Always wear clean gloves while touching the analyzer or any other parts that
go inside the analyzer chamber.
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 is a threat to MSD electronics” on page 20.)
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