5 Operating in EI Mode
To Vent the MS
7000/7010 Series TQ GC/MS Operating Manual 125
7 Remove the analyzer window cover. (See “To Open Left Side Panel for
Access to the Analyzer Chambers” on page 119.)
8 Turn the vent valve knob counterclockwise only 3/4 turn or until you hear the
hissing sound of air flowing into the analyzer chamber. (See Figure 42.)
Do not turn the knob too far or the O-ring may fall out of its groove.
Allow the analyzers to cool to near room temperature before touching them.
Always wear clean gloves while handling any parts that go inside the analyzer
chambers.
Figure 42. The MS vent valve knob
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