Agilent Technologies
Big Universal Trap
Installation Sheet
Agilent Gas Purifiers
Maximum operating pressure is 250 PSIG.
Maximum operating temperature is 100 °C.
Maximum flow rate is 8 liters per minute.
Installing the Big Universal Trap
Before installing the trap, make sure the system is free of leaks, the GC inlet and MSD
vacuum chambers are clean (if using mass spectrometry detection), and the system is
generally in good working order.
1 Shut down your GC/MSD or reduce the GC heated zone temperatures.
2 Set the gas source supply pressure to 10–15 psi and maintain flow in the gas source
line before disconnecting it from the inlet of the old trap.
3 Remove the protective nut and plug from the INLET end of the new trap. DO NOT
open the plug on the OUTLET end.
4 Immediately attach the new trap to the gas source tubing using one of the included
ferrule sets.
5 Insert the tubing through the nut and ferrule set until the tubing rests firmly
against the shoulder in the fitting.
6 Finger-tighten the nut and then use a wrench to tighten the nut 3/4 turn for
1/8-inch tubing and 1-1/4 turn for 1/4-inch tubing (see Figure 1).
Part number Fitting Gas
RMSH–2 1/8-inch Helium
RMSH–4 1/4-inch Helium
RMSN–2 1/8-inch Nitrogen
RMSN–4 1/4-inch Nitrogen
RMSHY–2 1/8-inch Hydrogen
RMSHY–4 1/4-inch Hydrogen
CAUTION
Failure to immediately connect the trap may cause contamination of the adsorbents inside,
which will reduce its adsorption capacity and contribute to elevated levels of contaminants
observed by the detector. This may result in the need for additional purge time.
Figure 1 Outlet fitting closed
OUTLET
Outlet fitting closedInlet fitting
99.997 + % He, N
2
, or H
2
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