Campbell Scientific Sentek EnviroSCAN Access Tube Installation Guide - Manual (Page 30)

Installing EnviroSCAN, EnviroSM ART & Diviner 2000 access tubes
© Sent ek Pt y Lt d Page 27
6. Change cotton cloths as required and continue with the cleaning action until inspection with
a flashlight (torch) shows that the access tube is clean and dry.
7. Note: In sandy soils, it may not be necessary to use the nylon brush tool as the access tube
can be easily cleaned with the rag tool. An alternative is to use a foam cleaning tool, which
is available as an Optional Extra (refer to section on Toolkit Items).
Step 5 – Installing the bottom stopper bung
The bottom stopper bung is installed after the access tube has been cleaned in all soil conditions, except for
in very wet and saturated soils. In these conditions, the bottom stopper bung is installed prior to cleaning.
To install the bottom stopper bung
1. Ensure the access tube is clean before proceeding.
2. Partially insert the expandable bung into the access tube and hold it at the upper end so that
about 75% of the top rubber ring is within the access tube.
3. Tighten the wing nut to the point where there is enough friction on the wall of the access
tube to prevent the bung from turning in the tube while the wing nut is tightened. Note: Do
not tighten the bung too much as air will be unable to move past the bung and will make it
hard or impossible to push to the bottom of the access tube.
4. Attach the Expandable Bung Tightening Tool to the auger extension rod and use the tommy
bars to tighten it firmly to the extension rods.
Caution:
Failure to tighten this tool securely may result in the tool loosening,
coming off the extension rod and landing in the bottom of the access
tube.