Temperature Compensation; Specific Compensation - Burkert 8223 Manuel Utilisateur

3.4 TEMPERATURE COMPENSATION

The conductivity varies with the temperature; To compensate the variations, the 8223
sensor measures the real conductivity and temperature of the fluid then re-calculates the
conductivity corresponding to a temperature of 25 °C.
SW2 makes it possible to choose the calculation mode of the temperature com pen sa tion.
Three calculation modes are possible, either:
- a specific compensation: 4 compensation curves are memorized by the
sensor for the following solutions: NaOH (sodium hydroxyde), HNO
acid), H SO (sulphuric acid), and NaCl (sodium chloride).
2 4
- a linear compensation: 9 compensation factors, from 0.1 to 5% can be chosen.
- no compensation.

3.4.1 Specific compensation

The specific compensation curves for NaOH (sodium hydroxyde), HNO
NaCl (sodium chloride) are valid for temperatures ranging from 10 to 70 °C.
The specific compensation curve for H
ranging from 5 to 55 °C.
The compensation has been determined at the following concentrations:
- The NaCl specific curve is valid for concentrations ranging from 60 mg/l
(conductivity ≅ 100 µS/cm) to 270 g/l (conductivity ≅ 220 mS/cm).
- The NaCl compensation curve can be used for some dilute solutions.
- If the fluid of your process does not correspond to any specific solution, use one
of the linear compensations.
CONFIGURATION
SO (sulphuric acid) is valid for tem per a tures
2 4
NaOH : 1%
HNO : 1%
3
NaCl : 0,2%
H SO : 20%
2 4
10
(nitric
3
(nitric acid) and
3
8223