Max300-LG : Description - Specifications - Installation Guide
Extrel
Core Mass Spectrometers
Page 34
Slide the nut over the long end of the replacement QuickInlet and install the metal gasket
on the flange half of the fitting. Slide the short end of the inlet into the flange fitting and
tighten the nut ¼ turn past finger tight.
Caution: over tightening this fitting may damage the sealing surfaces of the fitting.
Before connecting the sample line check that the new inlet is not touching the ion region.
Use an ohm meter to verify that pin “A” on the ionizer feedthrough is not shorted to
ground.
Reconnect the sample line to the new QuickInlet and start the vacuum pumps. The LED
on the turbo pump power module should reach a steady green state within 5 minutes. If it
continues to blink or turns red you most likely have a vacuum chamber leak and will have
to find and fix it before proceeding further.
Sample Stream Rotary Inlet Valves
Sample introduction into the enclosure is performed by rotary valves. During the life of
the rotary valve, a few common problems that may arise.
No flow
• A pressure of 5 PSIG above atmospheric pressure is usually sufficient to establish
flow. Sampling sub atmospheric streams requires special techniques. If the sample line is
not at sufficient pressure, the valve will not register flow.
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