When all the electrical tests have passed, tighten the flange bolts in a cross pattern to
keep the flanges parallel, prevent leaks, and keep the copper gasket from becoming
warped.
Quadrupole Removal
The mass filtering device used in the MAX300
™
-LG is a quadrupole. This component is
located directly behind the ionizer and utilizes the vacuum chamber as both its enclosure
and mounting structure. The quadrupole is comprised of four 3/4in (19mm) stainless steel
rods and provides a mass range of 2 to 300 amu.
Quadrupole Removal
Required Tools
• (1) 1/8 inch (3 mm) Flat Blade Screwdriver
• (1) ¼ inch Hex Key
• (1) 5/64 inch “Allen” or Hex key
• (1) Pair Lint Free or Nylon Gloves
Note: When handling any clean vacuum chamber components, lint free or nylon gloves
must be worn.
Note: The following procedure should be read in its entirety before attempting to remove
the quadrupole assembly.
Before removing the quadrupole, the vacuum system must be vented. Slide the VacTrac
assembly out of the enclosure by disconnecting the inlet line from the enclosure wall and
releasing the slide latch on the left slide of the VacTrac assembly. Disconnect the RF
cables from the feedthrough flange on the top of the vacuum chamber shown in Figure 16
by pushing down, rotating ~1/4 turn counterclockwise and then pulling. The RF
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