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HAPSITE ER Operating Manual
21 Place the black concentrator cover over the concentrator and elbow assembly.
The cover should fit easily; force is not required if the concentrator is properly
installed. (See Figure 3-53.)
Figure 3-53 Concentrator Cover
NOTE: If the cover does not easily fit over the concentrator, do not force it.
Check to ensure that the concentrator is correctly installed with the
concentrator fully seated into both elbows and the nuts properly
tightened for a secure fitting.
22 Close the front panel.
3.3.8 Probe Nut Assembly
The ferrules inside the probe nut are installed in the probe when shipped. It may
be necessary to replace the ferrules if they become misshapen due to frequent
use.
The orientation of the ferrules in the probe nut is critical for proper sampling when
attaching a bag sample or VX/R-33 Conversion Tube. Verify that the orientation of
the ferrules is correct prior to sampling.
1 Using a guide (i.e., a small screwdriver or a 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 upwards.
NOTE: Verify that the guide is clean to prevent the introduction of
contaminants into the HAPSITE ER system.
2 Place the small, back ferrule over the narrow end of the guide with the beveled
side facing upwards. (See Figure 3-54.)
3 The cone-shaped ferrule should be placed over the bevel with the narrow end
facing upwards. (See Figure 3-54.)
4 Carefully remove the nut assembly from the narrow end of the guide. Gently tap
the nut to seat the ferrule properly into the nut.
5 Thread the nut-ferrule assembly onto the probe.
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