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5
Operating in EI Mode
To Pumpdown the MS
7000/7010 Series TQ GC/MS Operating Manual
121
4
Open the vent valve by turning it counterclockwise 45 degrees.
5
Verify that the MS power cord is plugged into a grounded building’s mains
receptacle.
6
Turn on the MS by pressing the On/Off switch on the front of the MS.
7
Press lightly on the front and rear analyzer quad driver boards to ensure a
correct seal. Press on the metal box on the quad driver board.
8
Close the vent valve when it makes a hissing sound. (See
.)
The foreline pump will make a gurgling noise. This noise should stop within
a minute. If the noise continues, there is a
large
air leak in your system,
probably at the side plate seal, the interface column nut, or the vent valve.
9
Start the Agilent MassHunter GC/MS Acquisition software. If the TQ was
configured for both an EI and a CI source, you are prompted for the ion source
type that is currently installed. Click on an EI or CI source type if prompted.
10
Select the
MS Tune
icon from the
Instrument Control
panel.
Figure 40.
Vent valve knob
Vent valve knob
CAUTION
Do not push on the filament board safety cover while pressing on the analyzer
boards. This cover was not designed to withstand this type of pressure.