ELMETRON CX-401, User Manual, Page: 58 / 120

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User‘s manual for CX-401 multifunction meter v6.0x
15.2.2. Calibration with automatic temperature compensation
It is necessary to:
- enter the value of standard solution (point 13.1);
-
connect the conductivity cell and the temperature probe;
-
immerse both of them in the first standard solution, hold the conductivity
cell at least 1 cm away from the bottom and the walls of the vessel. The
measuring cell should be filled up with the measured solution, there
should not be any air bubbles and the electrodes should be evenly
moistened*;
-
measure the temperature of the solution and bring it to the introduced
value of reference temperature;
-
press and hold the button until the CAL symbol appears on the
display (Pic. 30).
-
with the button choose the calibration point corresponding to the
standard solution value, the point number (P1...P5) and the value entered
for this point will apear for a moment;
-
wait till the value stabilises and press the button. Blinking reading
informs about recording it in the memory. If the symbol displays, it is
necessary to check the introduced value of the standard solution;
- immerse the conductivity cell and the temperature probe in the next
solution and with the button choose its value to calibrate in the next
points
or
-
exit the calibration mode by pressing the button.
Pic. 30.
The meter is calibrated and ready to work.
*
- air bubbles may be removed by moving the immersed cell. In order to facilitate moistening of the
electrodes, it is recommended to immerse the cell in distilled water with washing-up liquid, and then
wash it in distilled water.