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3 Exact Positioning of the Push Rod in the Ion Source
This chapter is valid for all DIP systems for the Agilent 7000 Triple Q and for those for the
5975 MSD starting from serial number SN1938 (December 2009) because these systems
are not equipped with an inspection glass any longer:
In case of maintenance work at the push rod or for installing purposes it can be necessary to
reposition the push rod in the ion source. Then use the following procedure:
Note: Vent the MS before starting the following procedure (i.e. turbopump is off and ion
source temperature < 100 °C)
1. Turn on the foreline pump to get the prevacuum.
2. Remove the housing of the push rod and the front panel (see DIP user manual, 7.2.)
but do not disconnect the two cables to the front panel because you have to move the
push rod with the display keys later on!
3. Fix the transportation safety screw completely (shown in the figure next to step no.11,
see arrow).
4. Move the push rod out of the parking position in the valve by pressing the arrow key
“up” (front panel) once. Manually bring the push rod into the vertical (90°) position.
5. Remove the Teflon disc (left
figure) and replace it by a
brass one (right figure). The
marker of the valve plug
should be directed down to
the bottom (see blue arrow
in the right figure)..
6. Carefully take the front panel (still connected to the DIP system) and select the service
mode “Valve” (see DIP user manual, 5.4.).
7. Without the push rod (still in the vertical position), select “valve free” with the
subsequent clicks on the arrow keys “right” and “up” and “enter” for confirmation.
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