3
7
Note:
Drilling the three holes for installation
CANNOT
be done quickly. A set
of three holes will take
at least
10 minutes to drill correctly.
In the event of the
guide slipping or a drill bit breaking
(
that cannot be removed without
removing the guide
)
it is advised that the installation be abandoned and a new
site be found to start a fresh installation.
12.6
Use Spacers
Also, before installation you must determine the location of each measurement
point in the sapwood. This is done by knowing the bark depth and sap wood
thickness from the bark depth measurements and sapwood cores done initially.
If the bark thickness is greater than 10 mm thick it is recommended to remove
some bark to allow the outer measurement point to sit 2.5 mm below the
cambium in the outer sapwood. If the bark is thinner than 10 mm it is
recommended to cut small spacers of the exact thickness required to locate the
outer measurement point approx. 2.5 mm below the cambium in the sapwood.
Spacers can be made from electrical cable sheath stripped from the
figure-
8
power
cable
used
for
charging
the
SFM1.
Use a single edged razor blade to cut all three
spacers the same length with square edges on both
sides.
Spacer
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