To Pumpdown The Ms - Agilent Technologies 7000 Series Operating Manual

5 Operating in EI Mode

To Pumpdown the MS

To Pumpdown the MS

Ensure your MS meets all the conditions listed in the introduction to this
WAR N IN G
chapter before starting up and pumping down the MS. Failure to do so can
result in personal injury.
If hydrogen is used as a carrier gas or JetClean system supply, the carrier and
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JetClean system supply shutoff valves must be closed before turning off the
MS power. If the foreline pump is off, hydrogen will accumulate in the MS and
an explosion may occur. Read
the MS with hydrogen gas.


Procedure
1 Remove the analyzer window cover, and open the left analyzer panel to
2 Verify that the foreline pump inlet valve is open.
Do not open the vent valve without verifying that the hydrogen supply shutoff
WAR N IN G
valve is closed if the optional JetClean system is installed. Refer to the
JetClean Operating manual for warnings regarding hydrogen safety when the
hydrogen shutoff valve is open.
3 Verify that the vent valve is open by turning it clockwise until closed. (See
120
access the vent valve and the analyzer quad driver boards. (See
Left Side Panel for Access to the Analyzer Chambers"
Figure 40 on page 121.)
"Hydrogen Safety" on page 21 before operating
7000/7010 Series TQ GC/MS Operating Manual
"To Open
on page 119.)