Ametek Dycor Dymaxion Mass Spectrometer, User Manual

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5-6 | Dycor Dymaxion Mass Spectrometer
6. Insert the capillary tube through the nut (6) and the narrow end of the
ferrule (7).
7. Insert the capillary tube into the valve fitting (8) to a depth of about .75
inches (2 cm).
8. Tighten the nut (6) using a 1/4” wrench so that the nut compresses the
ferrule against the capillary to make an air-tight seal.
9. Insert the M1442 connector into a 1/4” Swagelok fitting to connect it to
the sample source (Figure 5-6).
5
6 7 8
M1442
To Source
Figure 5-5.
Capillary Connector.
Figure 5-6.
Completed capillary connection.
Aperture
This inlet allows a high pressure sample to be delivered right to the analyzer. Its
effective pressure is reduced by using a very small diameter aperture. The sample
is switched on using the manual or electropneumatic valves.
Sweep Tee
This inlet is similar to the aperture inlet except that an upstream tee fitting is
installed to provide fresh sample to the analyzer aperture at all times. The sample
is flushed past the aperture valve as a result of a pressure drop in the sample line.
A vacuum pump creates the pressure drop for sub-atmospheric sampling.
High Conductance Valve
This valve allows the analyzer to be attached to a high vacuum process. The large
bore of the valve permits good molecular flow to the analyzer. Installing one of
the inlets will allow sampling from higher pressure samples after the high con-
ductance valve is closed.