5-4 | Dycor Dymaxion Mass Spectrometer
Inlets
The Dymaxion offers a wide variety of inlet options to suit many applications.
The sensor manifold can support up to three different inlets at one time, reducing
the amount of time spent breaking vacuum and changing fittings. All inlets are
physically interchangeable on the same sensor manifold so they can be upgraded
or replaced without disturbing the rest of the system. Figures 5-1 and 5-2 show
two possible inlet configurations: one has manual valves and the other all electro-
pneumatic valves for remote operation.
Mathematically, aperture size and sample chamber pressure are clearly related
through the equation below. This relationship calculates the diameter of the ap-
erture needed to maintain a pressure of 10
-5
Torr in the quadrupole region (Figure
5-3).
Aperture Size (microns) = 50/(sample chamber pressure)
.5
Sampling at Atmosphere
Atmospheric sampling is possible using a capillary tube inlet. The gas inlet is a
fused silica capillary. The diameter and length of the capillary can be changed
to accommodate specific applications, but any adjustments must meet the 10
-5
Torr pressure requirement inside the vacuum system of the Dymaxion. The low
conductance of the capillary decreases the sample gas pressure from atmospheric
pressure to the pressure required by the Dymaxion. A heated capillary is available
to prevent sample condensation
desorption within the capillary.
Inlet Option Descriptions
Capillary
This inlet delivers sample to
the analyzer using a small-bore
capillary with an ID tailored to
suit the sample pressure. It is
available with either a manual or
electropneumatic valve. Figure 5-4 shows the manual and
electropneumatic capillary inlets. These can be mounted
on any Dymaxion manifold.
Содержание Dycor Dymaxion Mass Spectrometer
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Страница 75: ...Maintenance Troubleshooting 6 13 Figure 6 7 Quadrupole head pinout view of flange atmosphere side...
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Страница 117: ...Opto 22 Option Appendix B 15 OPTO 22 MODULE DATA SHEETS AMETEK Part 25540JE Input Module 2 Channel Analog 20 mA to 20 mA...
Страница 118: ...Appendix B 16 Dycor Dymaxion Mass Spectrometer AMETEK Part 25538JE Input Module 2 Channel Analog Type J K E Thermocouple...
Страница 119: ...Opto 22 Option Appendix B 17 AMETEK Part 25539JE Input Module 2 Channel Analog 10 VDC to 10 VDC Voltage Input...
Страница 120: ...Appendix B 18 Dycor Dymaxion Mass Spectrometer AMETEK Part 25541JE Output Module 2 Channel Analog 4 20 mA...
Страница 121: ...Opto 22 Option Appendix B 19 AMETEK Part 25542JE Output Module 2 Channel Analog 0 to 10 VDC...
Страница 122: ...Appendix B 20 Dycor Dymaxion Mass Spectrometer AMETEK Part 25578JE Digital Module 4 Channel AC Input 9 140 VAC...
Страница 123: ...Opto 22 Option Appendix B 21 AMETEK Part 25577JE Digital Module 4 Channel Isolated AC Output 12 280VAC...
Страница 124: ...Appendix B 22 Dycor Dymaxion Mass Spectrometer AMETEK Part 25577JE Digital Module 4 Channel Isolated AC Output 12 280VAC...
Страница 125: ...Opto 22 Option Appendix B 23 AMETEK Part 25544JE Output Module 4 Channel Source DC 5 60 VDC...
Страница 126: ...Appendix B 24 Dycor Dymaxion Mass Spectrometer AMETEK Part 25544JE Output Module 4 Channel Source DC 5 60 VDC...
Страница 127: ...Opto 22 Option Appendix B 25 AMETEK Part 25543JE Input Module 4 Channel 2 5 28 VDC...
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