Part 1—The Diviner 2000 display unit and probe
Calibrating Diviner 2000
Page 18
ACN 007 916 672
Sentek Pty Ltd
Working with customized calibration equations
Absolute data
To generate absolute data, you need to conduct gravimetric sampling to
calibrate the Diviner 2000 for every soil textural layer on your property.
Sentek Pty Ltd recommends that the Gravimetric sampling technique is
used. It is recognized as the world standard and has been used to calibrate
devices such as the Neutron Probe and TDR. (Refer to Appendix C).
The probe is calibrated by plotting scaled frequency against independently
determined soil water values expressed as volumetric soil moisture content
in percentage.
The relationship between scaled frequency and independently determined
volumetric soil moisture content values provide the calibration curve. This
relationship can be a straight line or curve and is described mathematically
by the calibration equation.
Creating a soil profile using customized calibration
equations
Ø
To enter Calibration mode
1.
Press
CALIBRATE
.
The
Calibration Mode
screen displays.
Ø
To create a soil profile
1.
Use the arrow keys
to highlight
Profile.
2.
Use
NEXT
and
PREVIOUS
to navigate through the different site
profiles.
3.
Or, use the
numeric key pad
to type in the site profile identification
number.
4.
Press
ENTER
to go directly to a particular site profile.
5.
Use the down arrow key to highlight
Datum.
If the top cap is flush with the soil surface, leave the Datum value at
0.0.
If the top cap datum plate is 5 cm/ 2inch above the soil surface, set the
Datum value to 5.0 cm /2.0 inch using the
numeric key pad
and
pressing 5 (or 2).
6.
Use the
arrow
keys to select
Soil Type
.
Summary of Contents for Diviner 2000
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