5TE Operator’s Manual
5. Connecting Sensors
17
is raw electrical conductivity and the third number is raw tem-
perature. The following explains how to convert the raw val-
ues into their standard units.
Dielectric Permittivity
The raw dielectric value (
ε
Raw
), is valid in the range 0 to 4094.
This corresponds to dielectric permittivity values 0.00 to
81.88. The 5TE uses the
ε
Raw
value of 4095 to indicate the
dielectric permittivity portion of the sensor is not working as
expected.
The
ε
Raw
value is converted to dielectric permittivity with the
following equation:
Electrical Conductivity
The raw electrical conductivity value (
σ
Raw
), is valid in the
range 0 to 1022. The 5TE uses a compression algorithm to
extend the range of electrical conductivity that can be repre-
sented by a 10-bit value.
σ
Raw
can be converted to bulk electri-
cal conductivities using the following algorithms.
If
σ
Raw
< 700 then EC (dS/m)=
If
σ
Raw
> 700 then EC (dS/m)=
ε
a
ε
Raw
50
-----------
=
Dielectric Permittivity =
100
Raw
σ
100
)
700
(
5
700
−
+
Raw
σ
