INFICON HAPSITE ER Chemical Identification System - Manual (Page 71)

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HAPSITE ER Operating Manual
2.8 Probe Sampling Options and Attachments
To expand the sampling range of the HAPSITE, sample collecting bags can be
used and special VX / R-33 Conversion Tubes can be attached.
2.8.1 Probe Nut Assembly
The orientation of the ferrules in the probe nut is critical for attaching a bag sample
or VX / R-33 Conversion Tube.
1 Using a guide (golf tee, small screwdriver, plastic pen cap with pocket clip
extension), place the metal probe nut over the guide’s narrow end. The threads
on the nut should be facing up.
NOTE: Be sure the guide is clean to prevent the introduction of contaminants
into the HAPSITE system.
2 Place the small, back ferrule over the narrow end of the guide with the beveled
side facing up.
3 The cone-shaped ferrule should be placed over the bevel with the narrow end
facing up. See
Figure 2-46 .
4 Carefully remove the nut assembly from the narrow end of the guide. Gently tap
the nut so that the ferrules seat properly into the nut.
5 Thread the nut-ferrule assembly onto the probe.
6 Finger-tighten the nut-ferrule assembly into place.
WARNING
Correct ferrule orientation is critical to avoid leaks of
hazardous or toxic material
Figure 2-46 Diagram of Proper Ferrule Orientation in the Probe Nut
Narrow end of cone
pointed upwards
Beveled side of back
ferrule pointed upwards
Body of the probe nut
NOTE: Use a guide (such as a pen cap or sharpened
pencil) inside the opening of the nut to ensure correct
back ferrule orientation.