Max300-LG : Description - Specifications - Installation Guide
Extrel
Core Mass Spectrometers
Page 26
the quadrupole mount screw, the assembly can be pulled out of the chamber and placed in
a clean area (a few Kimwipes placed on a level surface).
Note: do not force the quadrupole through the chamber! If it gets stuck, gently slide the
assembly side to side and up and down until it is easily removed.
Quadrupole Collar Shield Disassembly
Required Tools
• (1) Pair Lint Free or Nylon Gloves
• (1) 1/8 inch (3mm) flat blade screwdriver
Once removed from the vacuum chamber, a partial disassembly of the quadrupole is
necessary before cleaning. Place the quadrupole on a clean, level working surface before
beginning the disassembly procedure.
Figure 18: Quadrupole Collar Shield
Using the flat blade screwdriver, remove the four 2-56 pan head screws used to secure the
ionizer end collar shield plate, visible on the right of Figure 18. Remove the collar shield
by sliding the remaining components out of the detector end of the mass filter assembly.
This is best performed by grasping the remaining collar shield plate and gently pulling.
Locating pins are incorporated into the detector end plate to limit rotation of the assembly
with respect to the quadrupole. These pins will pull out of the mass filter collar without
any additional disassembly. (To clean the shield rod assembly, it is convenient to remove
the four shield rods from the detector end by removing the remaining four pan head
screws.) The wires connecting opposing poles can be left in place.
Note: Under no circumstances should the screws holding the quadrupole rods to the
ceramic collars be removed, adjusted or checked for tightness.
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