Campbell Scientific Sentek EnviroSCAN Access Tube Installation Guide User Manual

Page 31

Installing EnviroSCAN, EnviroSM ART & Diviner 2000 access tubes

Page 28

5. Place the Expandable Bung Tightening Tool over the wing nut and slowly push the bung

down the access tube. Allow air to escape until the bung rests on top of the internal cutting
edge on the inside of the tube.

6. Slowly turn the T-Handle until you feel you firm resistance to further turning. Note: The

bottom stopper bung is designed to run out of thread while tightening. This prevents over-
tightening which could cause damage to the walls of the access tube.

7. When the bung is sitting tight, twist the tool clockwise quickly while pulling upwards. This

will release the spring on the tool from the wing nut and enable you to pull the tool out of the
access tube.

Warning:

A watertight installation of the bottom stopper bung is essential to

prevent moisture and free water entering the access tube. Water inside

the access tube will distort soil moisture readings and damage electronic

circuitry.

In soils with water tables, it may be necessary to use two bottom

stoppers to ensure a totally water tight installation.

Step 6 – Installing the top cap

The top cap assembly is installed after the access tube has been cleaned and the bottom stopper fitted.

To install the top cap

1. Make sure the 4 cm (1.6 inches) of access tube protruding from the soil is clean inside and

out.