Max300-LG : Description - Specifications - Installation Guide
Extrel
Core Mass Spectrometers
Page 8
Figure 3: Ionizer
The ionizer assembly used in the MAX300
™
-LG has been designed for easy installation
and servicing. Figure 4 below depicts the ionizer assembly mounted on the flange.
Figure 4: Ionizer Assembly Mounted on Flange
Tungsten or Yittra coated Iridium are available as the filament material. Two filaments
are present in the assembly, located on each side of the ion volume. Only one filament is
used at a time. When Filament 1 has reached the end of its useful life, Filament 2 will
automatically be put into effect. However, the system will NOT transition automatically
from Filament 2 to Filament 1. If both filaments have burned out, the entire ionizer
assembly must be replaced.
Note: Because the ionizer may be hot, caution should be taken when removing the ionizer
assembly from the vacuum chamber.
Quadrupole Mass Filter
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.
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