Insert the
Profile Probe
Remove the tube cap and check for damp
probe
rod
o-ring
centring spring
If the access tube has been left empty for several weeks, check
for condensation by threading paper towel into the slot in the
cleaning rod and pushing this to the bottom of the tube. If there
is any water present, you will need to dry the tube thoroughly.
Check the centring springs
Remove the PR2 from its protective tube.
The
Profile Probe
is fitted with centring springs so
that the probe is correctly centred within an access
tube. They
must
be fitted and working properly for
the probe to take accurate readings. Each centring spring
(coiled spring) sits on top of an o-ring (see illustration).
Fit spacer (if required)
If your access tube has been installed flush with the soil surface,
you will need to fit the access tube spacer (SPA1). Slide the
spacer over the tip of the probe and push all the way up past the
top o-ring.
Insert the
Profile Probe
Take care as the first centring spring is pushed into the tube not
to pinch the spring unevenly against the side of the tube. A
slight twisting motion as the spring goes in will help protect it.
Align the probe
The probe should be aligned consistently each time it is inserted,
using the alignment marks on the access tube and the label on
probe handle.
If you want to maximise the sampling at each location, we
suggest that you take the average of three readings at each
location, with the tube rotated through 120° each time – the
three small screw heads can be used for this purpose.
Ensure that the
Profile Probe
is pushed all the way down over
the top o-ring.
The PR2 is then fully sealed in its access tube and ready either
for immediate reading or for attaching to a logger for extended
monitoring.
Profile Probe User Manual
3.0a
Operation
z
11
