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KD2 Pro Operator’s Manual
2. KD2 Pro Overview
with thermal grease to provide optimal contact between
the needle and the rock.
• For the dual-needle sensor,
the needles must remain
parallel to each other during insertion
to make an
accurate reading. Therefore, take care in tough material,
which can splay the prongs and adversely affect read-
ings. Use the provided red tab with pilot holes to make
sure that the needles have the correct spacing.
• Because the sensors give off a heat pulse,
you must
allow a minimum of 1.5 cm of material
parallel to the
sensor in all directions, or errors will occur.
•
DO NOT BEND THE NEEDLES
, as this can dam-
age the sensor beyond repair. If the needle becomes
bent,
do not bend it back
; contact Decagon for a
replacement.
•
Good thermal contact between the sensors and the
medium being measured is critical
for accurate mea-
surements if a hole is drilled for sensor insertion. Make
sure that the sensor fits tightly into the hole. Use the
thermal grease included with your KD2 Pro to improve
contact in larger holes or grainy samples.
Measurements In Concrete
If the KD2 Pro is to be used for measurements in concrete, it
is preferrable to mold pilot holes in wet concrete using the
pilot pins furnished with your KD2 Pro using the following
procedure.
• Coat pilot pin with vaseline.
• Install pin at least 100mm deep while concrete is wet.
• Remove pin when concrete has dried.
• Coat the single 10cm sensor with thermal grease, insert
sensor into the cast hole and begin to take readings.
