©
2005 Delta-T Devices Ltd
Insertion
Normal
Soil-surface
Short tubes
0.55m
0.60m
Long tubes
1.15m
1.20m
Pilot Auger
Push the pilot auger straight down by ~100mm.
Don’t allow the top of the auger to wobble
about.
If there is strong resistance, insert by
smaller steps. Rotate the auger through a half turn
and pull out carefully.
Clean the extracted soil from the auger onto the
plastic sheet using the spatula.
Continue in this way, taking great care to re-insert
the auger following the same path, until the hole is
deep enough.
Hints
If the soil is hard, you can
hammer
gently
on the top of
the pilot auger.
If the soil is dry and sandy you may need to pre-wet the soil so that it
sticks together, or use the spiral auger instead of the pilot auger.
Finishing Auger
This process is not needed for short access
tubes in soft soils
Change to the blue centring bush.
Begin inserting the auger, rotating
clockwise all the time. Auger about
200mm at a time.
Retract the auger while rotating anti-
clockwise and clean out with the spatula
(be very careful of the sharp edges).
Hints
In sticky soils, minimise damage to the sides of the hole by applying a light
spray of water to the sides of the auger as it is inserted. A second person
with a mist sprayer will help considerably.