IMKO SONO-View Manual page 16

In the last step, the calibration settings can be saved with "Save" to the previously selected calibration
memory location, or can be canceled with "Discard".
NOTE:
After performing "Save", the original material calibration is preceded by an "OWN:", indicating
that this is a specially prepared material calibration.
4.4.2.2.2 2-Point
For the 2-point, a linear equation (f (x) = mx + b) can be calculated with two moisture values of a material
and the corresponding tp values (running times of the radar signal) which are measured or set at the
respective material moisture. Even if a polynomial of a higher degree is useful for obtaining greater
accuracy, the straight line equation is often sufficient to obtain very good results.
NOTE:
In order to perform a 2-point material calibration, you need two material samples with different
moisture values. Moisture values should be determined by another method like kiln drying or
similar, before activating this calibration procedure. The sequence - "lower moisture value"
(more dry material) and then - "upper moisture value" (moist material) must be observed.
Procedure:
In the next step, the tp value (radar signal time) has to be determined by a measurement with the
connected probe at the lower moisture point or by manual setting with pre-determined tp values.
16
Use the / buttons to toggle between "Save" and
"Discard". The corresponding sub-point is selected
with the key and the key
to the previous point
After selecting the menu item "Material cal.", use the
/ buttons to "CHOOSE" one of the 15 stored
material-specific calibrations or "CHANGE" to perform
a new calibration on one of the 15 calibration
memories. The corresponding sub-point is selected
with the key and the key
Subsequently, the percentage moisture value at the
lower point of the material to be measured, must be set
with the / buttons. Press the button
the setting and press the button
previous item.
can be used to switch
leaves this menu point.
to accept
to move to the