Max300-LG : Description - Specifications - Installation Guide
Extrel
Core Mass Spectrometers
Page 23
Figure 14: Reinstalling Ionizer Flange
Note: Never reuse a copper gasket. A scratch undetectable to the eye may be present and
result in a vacuum chamber leak.
Use an ohm meter to verify proper installation of the ionizer before tightening the ionizer
flange bolts. The filaments, thermocouple and heaters will read low resistance when
measured. Check all the pins for shorts to ground (the chamber) and to each other. Also
check for a short between lens 2 and either of the quadrupole connections on the top of
the chamber. If the quadrupole has been removed for service, postpone this step until it
has been reinstalled. Figure 15 below depicts the wiring for the ten pin vacuum
feedthrough. Table 1 shows the function of each pin.
Figure 15: Inlet Flange 10 Pin feedthrough wiring
Table 1: 10-Pin Vacuum Feedthrough
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