INFICON HAPSITE Smart Plus Chemical Identification System - Manual (Page 69)

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HAPSITE Smart Plus Operating Manual
2.10 Sample Collection Modes
The Sample Loop is used to detect chemicals in the low ppm to high ppb
concentration range. The Concentrators are used to detect chemicals in the low
ppb to high ppt concentration range. The following procedures are used to install
and remove the Sample Loop and the Concentrator.
2.10.1 Installing the Sample Loop
The Sample Loop is a hollow stainless steel tube. The sample volume is
approximately 200 µL. Black insulation covers the center of the Sample Loop. Each
end has a nut and a black, Vespel
® ferrule assembly. See Figure 2-51 .
Figure 2-51 Sample Loop
Procedure
1 See section 2.10.2, Removing the Sample Loop, on page 2-34 to remove the
currently installed Sample Loop or see section 2.10.4, Removing the
Concentrator, on page 2-41 to remove the Concentrator.
NOTE: There is not a specific orientation for the Sample Loop.
2 Make sure a ferrule is installed in each metal nut with the wide end of the cone
facing toward the center of the Sample Loop, as shown in
Figure 2-51 . The
ferrules are inserted into the threaded end of the nut.
WARNING
The elbow fittings may be hot. Allow for these
components to cool before continuing.
3 While holding the ferrule and nut in place, insert one end of the Sample Loop
into the bottom elbow fitting.
4 Lift the top elbow fitting slightly, so that the top of the Sample Loop will fit
between the two fittings.
5 Press down on the top elbow. With your fingers, tighten the bottom nut until the
nut is finger tight. See
Figure 2-52 .