39
12.8
A
ttach
ing the
SFM1 to
the
Tree
and Install the Needles
If
all
three
holes
are
satisfactory
and
the
needles
greased
and
spacers
fitte
d
(if
necessary)
now
insert
the
needles.
Begin
by
inserting
the
Upstream (Bottom)
needle
first
then
H
eater
and
finall
y the Downstreeam (Top)
needle.
You
should
only
require
light
finge
r p
ressure
to insert the needles into the drill holes.
Position the instrument so that a gentle curve in the cable of the measurement
needles is created to take the strain off the
cables.
Then
fi
t the
mounting
bracket
in
place
just below
where you wish to drill the measurement point holes
.
The
bracket
provides
many
options
such
as
a
25
mm
long
fla
t h
ead
nail
on
either
side
hammered
into
the
sapwood of the tree. Alternatively, a tie-down strap and buckle
can be passed through the slots on either side and tightened around the tree.
WARNING
– NEVER use a hammer or heavy object to hammer the needles into
place. This will damage the needles.
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