6 Commissioning
Mycom S CLM 153
38
EHauser
Temperature compensation with table
The following conductivity data of the medium to be measured are required if using the
alpha table function for temperature compensation:
Value pairs of temperature T and conductivity
k
with:
•
k
for the reference temperature T
0
and
•
k
(T) for temperatures which occur in the process.
Linear compensation
The conductivity change between two
temperatures is taken as constant (i.e.
α
= const., see adjacent fig. 13.).
You can edit this
α
value in linear
compensation.
Likewise, you can enter the associated
reference temperature. Please refer to
the data sheets for the reference
temperature.
Fig. 13:
Linear temperature compensation
NaCl compensation
For NaCl compensation (in accordance
with IEC 60746), a fixed non-linear curve
is stored which determines the
relationship between the temperature
coefficient and the temperature. This
curve applies to low concentrations of
approx. 0.1 ... 5% NaCl.
Fig. 14:
NaCl compensation
Fig. 15:
Data required and
α
values determined with temperature compensation with table
1
α
Conductivity
(uncompensated)
C07-CLM153xx-05-06-00-en-001.EPS
Temperature [°C]
0
48
96
144
Temperatur
e
coef
ficient
[%/K]
C07-CLM153xx-05-06-00-en-002.EPS
Temperature [°C]
2.1
2.3
2.5
2.7
T
1
T
0
T
2
T
T
k
2
k
1
k
k( )
T
0
T
1
T
2
α
1
α
2
α
Reqired data
Evaluated
values
α
C
07-CLM153xx-05-06-00-en-003.EPS
