Temperature Calibration - XS Instruments Revio Manual De Instrucciones

Compensation coefficients for special solutions and for groups of substances are shown in the following
table:
Solution
NaCl Saline Solution
5% NaOH\ Solution
Diluted ammonia solution
10% Hydrochloric acid solution
5% Sulfuric acid solution
Compensation coefficients for calibration standards at different temperatures for T
following table:
°C 0.001 mol/L KCl (147µS)
0 1.81
15 1.92
35
2.04
45 2.08
100 2.27
The following formula is used to determine the calibration coefficient of a particular solution:
Where tc is the temperature coefficient to be calculated, C
and temperature 2 (T2).
Each result with the compensated temperature is affected by an error caused by the temperature coefficient.
The better the temperature correction, the lower the error. The only way to eliminate this error is to not use
the correction factor, acting directly on the sample temperature.
Select 0.00% as temperature coefficient, to deactivate the compensation.
The displayed conductivity value refers to the real temperature value measured by the probe and not related
to a reference temperature.
• Ultrapure water: Select this option when working with conductivity LOWER than 10 µS/cm.
An icon in the upper left corner of the display informs the user that this compensation mode is being
used. When this threshold is exceeded, this option is automatically disabled, and linear compensation
is activated.
The temperature coefficient in ultrapure water varies strongly. The main reason for is that the
self-ionization of water molecules is more temperature-dependent than the conductivity caused by the other
ions.
Note: Low conductivity measurements (<10 µS/cm) are strongly influenced by atmospheric carbon dioxide.
To obtain reliable results, it is important to prevent contact between the sample and the air, this can be
achieved by using a flow cell or chemically inert gases, such as nitrogen or helium that isolate the sample
surface.

Temperature calibration

All the instruments in this series are pre-calibrated for a correct measure of the temperature. However, if
there is a difference between the measured and the real one (usually due to a malfunction of the probe), it
is possible to adjust the offset of + 5°C.
After connecting the temperature probe in the right measurement channel, use the directional keys
and to correct the temperature offset value and confirm with the button
TDS factor
Access this setup menu to modify the factor 0.4...1.00 -default 0.71- to carry out the conversion from
conductivity to TDS.
• See section -Other measurements performed with conductivity cell.
UM ReVio EN rev.0 04.06.2020
(%/°C)
2.12
1.72
1.88
1.32
0.96
0.01 mol/L KCl (1413 µS)
1.81
1.91
2.02
2.06
2.22
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����2
( ���� − 25 ) − ����
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30
Sample
1.5% hydrofluoric acid
Acids
Bases
Salts
Drinking water
25 °C are shown in the
ref
0.1 mol/L KCl (12.88 mS)
1.78
1.88
2.03
2.02
2.14
����1
(���� − 25)
����2 1
and C are conductivity at temperature 1 (T1)
T1 T2
(%/°C)
7.20
0.9 - 1.60
1.7 – 2.2
2.2 - 3.0
2.0
.
EN