User Guide

4544
To set a TDS factor value proceed as follows
(only available in TDS measurement mode):
e.g. 0.90
• Press the FTR key
• Press .
• Press 9
• Press ENTER ("F 0.90" will fix on LCD)
The TSD value in aqueous solutions is di-
rectly proportional to the conductivity of a
solution.
The ratio between the two measures de-
pends on the solution and usually it is set to
a factor of 0.5 (CaCo
3
). This means that
each µS/cm is converted in 0.5 mg/l or
0.5 ppm.
With HI 9032 the TDS factor can be set to
the most appropriate value depending on the
solution to be measured.
For accurate TDS measurements with HI9032
make sure the meter has been calibrated in
conductivity and the temperature coefficient
is properly set.
SETTING TDS FACTOR
FTR
1
TDS
ppm
TDS
ppm
%TC
.
ENTER
NaCl
9
The temperature coeffi-
cient automatically de-
faults to 2% when the
meter is turned on and
can be set from 0%
(without compensation)
to 3% per degree Cel-
sius.
DETERMINATION OF THE TEMPERATURE
COEFFICIENT OF A SOLUTION
Follow the procedure described
below:
• Immerse the probe into a sample
of the solution.
• Set the temperature coefficient to 0% (i.e.
no compensation) as follows:
Press the %TC key
Press 0
Press the ENTER key.
• Condition the sample and probes at 25°C and
write down the conductivity reading "C25".
• Condition the sample and probes to a
temperature t°C which is approximately
5°C to 10°C different from 25°C and note
the conductivity reading "Ct".
• The temperature coefficient ß of the solu-
tion is calculated with the formula:
(Ct - C25)
ß = 100 x ---------------------------
(t - 25) x C25
CONDUCTIVITY
%TC
S
m
%TC
.
ENTER
ATC
MTC
0
CONDUCTIVITY
%TC
S
m