Xylem ProLab 4000 MULTIPARAMETER BENCHTOP METER - Manual (Page 139)

ProLab 4000 Conductivity
139 ba75646d02 01/2010
10.2.5 Selecting the nonlinear temperature compensation TC
nLF
10.2.6 Selecting the linear temperature compensation TC Lin...
The temperature coefficient for the linear temperature compensation is
adjustable in the range of coefficients from 0.001 ... 3.000 %/K.
The linear temperature compensation is carried out according to the
following equation:
1 Highlight the channel of the conductivity measuring cell in the
measured value display.
2 If necessary, select the measured parameter with <MODE>.
3 Select the nonlinear temperature compensation with Measur-
ing / Temperature coefficient / TC nLF.
In the status line, [nlF] is displayed.
X
Tref
= X
T
/ (1 + [TC/100]·[T-TRef])
X
T
= Conductivity at temperature T [S/cm]
X
Tref
= Conductivity at reference temperature Tref [S/cm]
TC = Temperature coefficient [%/K]
T = Temperature [°C]
Tref = Reference temperature [°C]
1 Highlight the channel of the conductivity measuring cell in the
measured value display.
2 If necessary, select the measured parameter with <MODE>.
3 Open the input window for the temperature coefficient of the
linear temperature compensation with Measuring / Tempera-
ture coefficient / TC Lin....
4 Enter the temperature coefficient and confirm with <OK>.
[Lin] is displayed in the status line of the measuring channel.