Manual SONO-VIEW Version 3_1
2017-05-24
Page 20
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.
Use the /
buttons to toggle between "Save" and
"Discard". The corresponding sub-point is selected with
the key and the key can be used to switch to the
previous point.
1.1.1.2.2
2-Point Calibration
For the 2-point calibration, 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:
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 leaves this menu point.