ELMETRON CX-401, User Manual, Page: 63 / 120

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16.3. Measurement with manual temperature compensation
Measurement with manual temperature compensation may be made in
stable work conditions, e.g., during measurements in laboratory, especially
with use of thermostat, or in case of the temperature probe damage.
Disconnecting of the temperature probe switches the meter to manual
temperature compensation.
In case of measurement with manual temperature compensation:
-
connect the conductivity cell to the Cond connector (Pic. 2);
-
disconnect the temperature probe;
-
switch the meter on with the button;
- choose the conductivity measuring unit (section 13.1);
-
if the conductivity cell was not calibrated, calibrate it according to the
chapter 15);
-
check or change the value of the reference temperature and the
α
coefficient;
- immerse the conductivity cell in the standard solution and hold it at least
1 cm away from the bottom and walls of the vessel. The measuring cell
should be filled up with the standard solution and should not include any
air bubbles, the electrode’s surface should be evenly moistened*;
-
measure the temperature of the solution with a laboratory thermometer
and enter the value with the ,
buttons;
-
after stabilisation check the reading (Pic. 35).
Note: pressing the , buttons simultaneously sets the temperature
to the reference temperature value.
Pic. 35.
*
- 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..