(b) For organic or lipid pollutant, clean the platinum surface with detergent, then wash it in pure water, then
submerge it in the soaking 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 pure water, then submerge it in the soaking solution for 6 hours
6 Conductivity Measurement:
6.1 Conductivity Electrode Information
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 submerge 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
chart- 6 for measuring range. Set constant in parameter setting P2.1 and refer to clause 7.4
Chart – 6 Electrode constant and measuring range
6.2 Conductivity Calibration
6.2.1. Conductivity calibration solutions
The meter uses conductivity standard solution of 84 μS/cm, 1413 μS/cm, 12.88 mS/cm and 111.9 mS/cm.
The meter can recognize the standard solution automatically, can perform one-point or multi-point
calibration (the maximum is four-point calibration). The calibration indication icons correspond to the four
standard values ( icon corresponds to two standards). See chart – 7:
Chart – 7 Conductivity standard solution series
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