User Manual

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electrode:
(a) For inorganic pollutant, soak the electrode in 0.1mol/L dilute hydrochloric acid for 30 minutes, then wash it in
distilled water, then soak it in the 3M KCL storage solution for 6 hours.
(b) For organic or lipid pollutant, clean the platinum surface with detergent, then wash it in distilled water, then soak
it in the 3M KCL storage solution for 6 hours.
(c) For heavily polluted platinum surface on which there is oxidation film, polish the platinum surface with toothpaste,
then wash it in distilled water, then soak it in the 3M KCL storage solution for 6 hours.
6 CONDUCTIVITY MEASUREMENT
Information regarding the Conductivity Electrode
6.1.1. Conductivity electrode
Model 2301T-S plastic conductivity electrode with constant K=1.0 and built-in temperature sensor, can realize
automatic temperature compensation. The electrode housing is POM plastic which is corrosion resistant and
impact resistant. When dipping the conductivity electrode in solution, stir the solution briefly to eliminate the air
bubbles and improve response and stability.
6.1.2. Conductivity electrode constant
The meter matches conductivity electrodes of three constants: K=0.1, K=1.0 and K=10.0. Please refer to table-
7 for measuring range. Set constant in parameter setting P2.1 and refer to section 7.4
Table– 7 Electrode constant and measuring range
Range
＜20 μS/cm
0.5 μS/cm to 100 mS/cm
＞100mS/cm
Conductivity
electrode
constant
K=0.1 cm
-1
K=1.0 cm
-1
K=10 cm
-1
Standard solution
84μS/cm
84 μS/cm
1413 μS/cm
12.88 mS/cm
111.9 mS/cm
Electrode’s model
DJS-0.1T-S
2301T-S
2310T-S
Note: When testing ultra-pure water with conductivity less than 1.0 μS/cm, a flow test should be conducted in a flow
cell.
6.1.3 When connecting the electrode, please rotate slowly to identify the location of the mount before plugging in.
The nut on the connector should be screwed on tightly. Once the conductivity electrode is connected, the meter will
automatically switch to conductivity mode (no need to switch manually). Please do not pull the cable in case of poor
contact. Make sure the connector is clean and dry. See more information regarding the conductivity electrode’s
maintenance in section 6.6.
Information regarding Conductivity Calibration
6.2.1 Conductivity Standard Calibration Solutions
The meter uses conductivity standard solution of 84 μS/cm, 1413 μS/cm, 12.88 mS/cm and 111.8 mS/cm. The
meter can recognize the standard solution automatically, and can perform 1 to 4 points of calibration. The
calibration indication icons correspond to the four standard values as shown in Table-8.