5 Operating in EI Mode
To Pumpdown the MS
120 7000/7010 Series TQ GC/MS Operating Manual
To Pumpdown the MS
Procedure
1 Remove the analyzer window cover, and open the left analyzer panel to
access the vent valve and the analyzer quad driver boards. (See “To Open
Left Side Panel for Access to the Analyzer Chambers” on page 119.)
2 Verify that the foreline pump inlet valve is open.
3 Verify that the vent valve is open by turning it clockwise until closed. (See
Figure 40 on page 121.)
Ensure your MS meets all the conditions listed in the introduction to this
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
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 “Hydrogen Safety” on page 21 before operating
the MS with hydrogen gas.
Do not open the vent valve without verifying that the hydrogen supply shutoff
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.
To Next Page
Loading...
Need help?
General
