7
KD2 Pro Operator’s Manual
2. KD2 Pro Overview
ARROW KEYS:
Located in the center of the
keypad, these keys navigate within menus and
sub-menus, and modify different settings in sub-
menus. Holding down an arrow key allows you to
scroll between different options quickly.
ESCAPE:
This key backs out of sub-menus and
can be used to cancel certain actions (see “Erase,”
in “Data Menu,” Chapter 2).
ENTER:
This key is used to make selections
within menus and sub-menus, and also begins
taking measurements (see “Making a Measure-
ment,” “Main Menu,” below).
Choosing a Sensor
The KD2 Pro comes with three separate sensors, each of
which is designed for measurements in specific sample types.
KS-1
The small (60 mm long, 1.3 mm diameter) single needle KS-1
sensor measures thermal conductivity and thermal resistivity. It
is designed primarily for liquid samples and insulating materials
(thermal conductivity < 0.1 W (W/m· K)). The KS-1 sensor
applies a very small amount of heat to the needle which helps to
prevent free convection in liquid samples (see Chapter 6 in this
manual regarding measurement in liquid samples for more infor-
mation). However, the small size of the needle and typically
short heating time make the KS-1 a poor choice for granular
samples such as soil and powders where contact resistance can
be an important source of error. In insulating materials, the
