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Line Power, Vacuum System, Gases, and Ethernet Communication
Connecting the Gases to the MS Detector
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LTQ Series Getting Connected Guide
Thermo Scientific
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To connect the nitrogen source to the LTQ Series mass spectrometer
1. Connect an appropriate length of 1/4-in. ID Teflon™ tubing with a brass Swagelok™-type
1/4-in. nut (P/N 00101-12500) and a 2-piece brass 1/4-in. ferrule [P/N 00101-10000
(front), P/N 00101-04000 (back)] to the nitrogen source.
See
for the proper orientation of the fitting and ferrule.
2. Connect the opposite end of the Teflon tubing to the press-in fitting labeled
NITROGEN IN and located on the back panel of the LTQ Series MS detector. To
connect the tubing, align the Teflon tubing with the opening in the fitting and firmly
push the tubing into the fitting until the tubing is secure.
Connecting the Helium Source
The helium
for the LTQ Series MS detector collision gas must be ultra-high purity (99.999%)
with less than 1.0 ppm each of water, oxygen, and total hydrocarbons. The required gas
pressure is 275 ± 70 kPa (40 ±10 psi). Because particulate filters can be a source of
contamination, Thermo Fisher Scientific does not recommend their use.
You can dispense helium from a tank containing 245 ft
3
of gas, using a Matheson 3120 Series
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regulator or equivalent tank and regulator.
Whether you choose copper or stainless steel gas lines for the helium, use gas lines that are free
of oil and preferably flame dried. Run the gas lines to the back of the LTQ Series MS detector.
Terminate the helium gas supply lines with 1/8-in., female, Swagelok-type connectors.
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To connect the helium source to the LTQ Series mass spectrometer
1. Connect an appropriate length of 1/8-in. ID copper or stainless steel tubing with a brass
Swagelok-type 1/8-in. nut (P/N 00101-15500) and a 2-piece brass 1/8-in. ID ferrule
[P/N 00101-08500 (front), P/N 00101-2500 (back)] to the HELIUM IN gas inlet
located on the back panel. See
for the proper orientation of the fitting and
ferrule.
2. Connect the opposite end of the tubing to the helium gas source, using an appropriate
fitting.
Figure 5.
Proper orientation of the Swagelok-type nut and two-piece ferrule
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For more information, visit: http://www.matheson-trigas.com
Gas hose
Front ferrule
Back ferrule
Swagelok-type nut
