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8
CI Maintenance
To Switch from an EI XTR Source to the CI Source
7000/7010 Series TQ GC/MS Operating Manual
207
To Switch from an EI XTR Source to the CI
Source
Procedure
1
Vent the MS. (See
2
Open the analyzer. (See
“To Open the Front Analyzer Chamber”
3
Remove the EI XTR source. (See
4
Remove the brown extractor wire from the CSB and store it with the EI
extractor storage box. (See
“To Connect or Disconnect Wiring to the EI XTR
5
Install the CI source. (See
“To Install the 7010 Series CI Source”
6
Close the analyzer. (See
“To Close the Front Analyzer Chamber”
7
Pumpdown and switch from EI to CI mode. (See
CAUTION
Always verify MS performance in EI before switching to CI operation.
Always set up the CI MS in PCI first, even if you are going to run NCI.
CAUTION
Electrostatic discharges to analyzer components are conducted to the side
board where they can damage sensitive components. Wear a grounded
antistatic wrist strap. (See
on page 151.) Take
antistatic precautions
before
you open the analyzer chamber.