SM150T User Manual 1.0
Operation
27
Sensor calibration
Each SM150T is individually adjusted to provide consistent
dielectric performance:
This response can be approximated either by a polynomial (below)
or by a linearisation table (see next page):
Polynomial
(for use over the full range of SM150T readings)
√𝜖 = 1.0 + 14.4396𝑉 − 31.2587𝑉
2
+ 49.0575𝑉
3
− 36.5575𝑉
4
+ 10.7117𝑉
5
where
V
is the SM150T output in Volts
0.0
2.0
4.0
6.0
8.0
0.0
0.2
0.4
0.6
0.8
1.0
1.2
So
il
r
e
fr
act
ive
in
d
e
x
(√
ε
)
SM150T output (Volts)
SM150T dielectric performance
