8CI 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 “To Vent the MS” on page 124.)
2 Open the analyzer. (See “To Open the Front Analyzer Chamber” on
page 156.)
3 Remove the EI XTR source. (See “To Remove the EI XTR Source” on
page 162.)
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
Source” on page 164.)
5 Install the CI source. (See “To Install the 7010 Series CI Source” on
page 211.)
6 Close the analyzer. (See “To Close the Front Analyzer Chamber” on
page 195.)
7 Pumpdown and switch from EI to CI mode. (See “To Pumpdown and Switch
from EI to CI Mode” on page 144.)
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.
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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