Extrel MAX300-RTG - Quadrupole Mass Filter

MAX300-RTG : Hardware Manual Hardware Maintenance
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Figure 41: Inlet Flange 10 Pin feedthrough wiring
Table 1: 10-Pin Vacuum Feedthrough
Pin
Function
A
Thermocouple (+)
B
Extractor
C
Filament 1
D
Filament Common
E
Filament 2
F
Lens 2
G
Heater
H
Thermocouple (-)
I
Heater
J
Lens 1
When all the electrical tests have passed, tighten the flange bolts a little at a time
in a cross pattern to keep the flanges parallel, prevent leaks, and keep the copper
gasket from becoming warped.
Quadrupole Mass Filter
The mass filtering device used in the MAX300-IG is as the 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
3/4 inch (19mm) stainless steel rods and provides a mass range of 2 to 250,300,
or 500 amu (configuration dependent).
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