8CI Maintenance
To Switch from the EI HES to the CI Source
222 7000/7010 Series TQ GC/MS Operating Manual
To Switch from the EI HES to the CI Source
Procedure
1 Vent the MS. (See “To Vent the MS” on page 124.) The software will prompt
you for the appropriate actions.
2 Open the left side access panel. (See “To Open Left Side Panel for Access to
the Analyzer Chambers” on page 119.)
3 Open the analyzer chamber. (See “To Open the Front Analyzer Chamber” on
page 156.)
4 Remove the EI HES. (See “To Remove the EI HES” on page 159.)
5 Place the EI HES in the storage container.
6 Remove the EI HES radiator. (See “To Remove the EI HES Radiator” on
page 208.)
7 Place the EI HES radiator in the storage container.
8 Remove the CI source radiator from the storage container.
9 Install the CI source radiator. (See “To Install the CI/EI XTR Source
Radiator” on page 223.)
10 Remove CI source from the storage container.
11 Install the CI source. This requires shortening the column so that it protrudes
from the transfer line by 1 to 2 mm. (See “To Install the 7010 Series CI
Source” on page 211.)
12 Pumpdown and switch from EI to CI mode. (See “To Pumpdown and Switch
from EI to CI Mode” on page 144.)
Always verify GC/MS performance in EI before switching to CI operation.
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 151.) Take
antistatic precautions before you open the analyzer chamber.
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