48
⚫
How it works
Soil-specific calibrations
Instead of adopting the generic soil calibrations, you may wish to
determine specific soil calibration values of a0 and a1 for your
soil. Soil-specific calibrations can significantly improve the
accuracy of individual readings - but make less of an
improvement to readings where installation and sampling errors
are high.
This procedure is fairly straightforward if you have access to
standard laboratory equipment and is described in detail in the
Appendix on page 63.
In DeltaLINK, a WET150 logging program using custom
𝑎
0
and
𝑎
1
values from a soil-specific calibration can be entered in the
properties panel on the right of the program editor window,
under the calculation section. These values will then be used for
the water content (theta) calculation.
Note:
. As the properties panel is context sensitive, the ‘Theta’
measurement must first be selected in the overview panel on the
left of the program editor window.
The WET150 is also able to directly compute and output soil
water content using custom
𝑎
0
and
𝑎
1
values from a
soil-
specific calibration.
See the
WET150 SDI-
12 Programmer’s Guide
for more
information on using soil-specific
𝑎
0
and
𝑎
1
values for outputting
water content measurements directly from the WET150.
