User manual | H2O Transmitter
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7
Sensor format EC-5
Parameter
Default value
No. of integers
3
No. of decimals
1
Sign
no
Units
%
Calibration point 1
Real value
800 mV
Logical value
00.0 %
Calibration point 2
Real value
4000 mV
Logical value
100.0 %
• EC-5 Decagon Decagon The sensor delivers a
voltage x[mV] that the H2O transmitter transforms
into VWC [%] (Volumetric Water Content or Soil
Water Content) using the following expression:
VWC [%] = bx+a, and according to soil type:
‒ Mineral soil:
∙ a = -0.48
∙ b = +11.605E-4
‒ Potting soil:
∙ a = -0.696
∙ b = +17.749E-4
The value, in [%], is converted, by the transmitter
itself, to standard 4-20 mA current (800-4000 mV in
Agrónic format), so that the controller in question
must select the Ideal data format according to the
type of sensor and type of soil selected. It is the res-
ponsibility of the user to change the data that charac-
terizes said format.
Sensor format TEROS-10
Parameter
Default value
No. of integers
2
No. of decimals
1
Sign
no
Units
%
Calibration point 1
Real value
800 mV
Logical value
00.0 %
Calibration point 2
Real value
4000 mV
Logical value
70.0 %
• TEROS-10 Meter Group The sensor delivers a
voltage x[mV] that the H2O transmitter transforms
into VWC [%] (Volumetric Water Content or Soil
Water Content) using the following expression:
VWC [%] = dx3+cx2+bx+a , and according to the
soil type:
‒ Mineral soil:
∙ a = -2.154
∙ b = +3.898E-3
∙ c = -2.278E-6
∙ d = +4.824E-10
‒ Potting soil:
∙ a = -2.683
∙ b = +4.868E-3
∙ c = -2.731E-6
∙ d = +5.439E-10
The value in [%] is converted, by the transmitter itself, to standard 4-20 mA current (800-4000
mV in Agrónic format), so that, in the controller in question, it is necessary to select the Ideal
data format according to the type of sensor and type of soil selected. It is the responsibility of the
user to change the data that characterizes said format.