ELMETRON CX-401, User Manual

Page: 76 / 120

- 70 -
User‘s manual for CX-401 multifunction meter v6.0x
21.2. The salinity influence compensation
Salinity of the solution influences the oxygen solubility in water and has to be
taken into consideration in case of measurements in mg/l. 1 g/l of salinity
change causes about 0.5% of the oxygen concentration change. The
meter enables entering the salinity value in g/l and counts the change of the
oxygen concentration in mg/l.
21.2.1. Automatic introduction of the salinity value
The meter enables automatic introduction of measured solution salinity. In
order to do it:
- enter the conductivity measuring function by pressing the
button;
- measure salinity of the solution in g/l unit with conversion to NaCl (accurate
description in the section 17.1);
- after stabilisation of the salinity result enter the oxygen measuring mode by
pressing the
button;
- press the
button until the
(salinity) symbol displays in the lower
row of the LCD;
- press the
button shortly; In the upper row of the LCD the value of
the measured salinity in g/l will be displayed automatically. If after pressing
the button an
(error) symbol and next the previous value of salinity is
displayed it informs that during the conductivity measurement the unit has
not been changed for g/l of NaCl;
- return to the measuring mode by pressing the button.