Xylem ProLab 4000 MULTIPARAMETER BENCHTOP METER - Manual (Page 137)

ProLab 4000 Conductivity
137 ba75646d02 01/2010
Temperature compensa-
tion for diluted solutions
For the measurement of aqueous solutions
z in a low concentration range (diluted solution)
z in a small temperature range (|T - Tref| < 10 K)
z with a fixed reference temperature at 20 °C or 25 °C,
the procedures of linear (TC lin) and nonlinear (TC nLF) temperature
compensation are suitable.
The calculation of the temperature compensation is based on the pre-
set reference temperature, 20 °C or 25 °C. It appears on the display as
[TR20] or [TR25].
Application tips Select the following temperature compensation given in the table
according to the respective test sample:
Note
The reference temperature and temperature compensation are set in
the Measuring menu (see page 134).
Test sample Temperature compensation Display
indica-
tor
Natural water
(ground water, surface
water, drinking water)
nLF
according to EN 27 888
nLF
Ultrapure water nLF
according to EN 27 888
nLF
Seawater
(salinity) Automatic nLF according to IOT Sal, nLF
Other diluted solutions
with known tempera-
ture dependency Linear temperature compensa-
tion;
Temperature coefficient can be
set in the range
0.001 ... 3.000 %/K
lin
Solutions with
unknown temperature
dependency No temperature compensation