KD2 Pro Operator’s Manual 2. KD2 Pro Overview
viscosities, the heating of the needles may cause free convection to occur, thus producing incorrect readings.
Installing the Sensors The KD2 Pro’s three sensors have been designed for ease of installation and use. The following considerations should be observed when installing the sensors. • The sensor should be inserted all the way into the medium to be measured. • For the single-needle 10cm sensor, a drill bit has been included that can be used to drill a pilot hole in material such as stone, wood or hard soil. • 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 readings. Use the provided red tab with pilot holes to make sure that the needles are inserted properly. • 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 damage 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 measurements if a hole is drilled for sensor insertion. Make sure that the sensor fits tightly into
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