To Pump Down The Msd - Agilent Technologies 5975T LTM GC Operation Manual

3
Operating in Electron Impact (EI) Mode

To Pump Down the MSD

You can also use the Local Control Panel to perform this task. See
the GC/MSD from the LCP"
Make sure your MSD meets all the conditions listed in the introduction to this
WA R N I N G
chapter
can result in personal injury.
If you are using hydrogen as a carrier gas, do not start carrier gas flow until the
WA R N I N G
MSD has been pumped down. If the vacuum pumps are off, hydrogen will
accumulate in the MSD and an explosion may occur. Read
before operating the MSD with hydrogen carrier gas.
Procedure

1 Open the LCP/Analyzer window and close the vent valve.
2 Plug the power cord into the building supply.
3 Select Tune and Vacuum Control from the View menu in the MSD ChemStation.
4 When prompted, press the start button on the front of the instrument.
5 Reaching through the LCP/Analyzer window opening, press lightly on the
6 Close the LCP/Analyzer window.
106
(page 69) before starting up and pumping down the MSD. Failure to do so
Select Pump Down from the Vacuum menu.
side board to ensure a correct seal. Press on the metal box on the side
board.
The foreline pump will make a gurgling noise. This noise should stop within
a minute. If the noise continues, there is a
probably at the side plate seal, the interface column nut, or the vent valve.
.
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5975T LTM GC/MSD Operation Manual
"Operating
"Hydrogen Safety"
air leak in your system,