Conductivity meter
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I lost the conductivity meter calibration strip; how can I calibrate it?
Different instrument models require different calibration methods; see if the methods below are suitable for your instruments Prepare a 0.01 mol/L potassium chloride solution. Set the conductivity meter to the calibration mode, immerse the electrodes in the potassium chloride solution; the conductivity at 25°C is 1408.8 μS/cm. If the reading is incorrect, adjust the calibration knob until the reading shows 1408.8.
If the electrode is metallic and has electrical conductivity, one can prepare standard potassium chloride or sodium chloride solutions by oneself, making sure to use boiled pure water for preparation. Or purchase standard conductivity solutions from some instrument companies. But in the case of a conductivity analyzer that uses conductivity electrodes for sensing, calibration can be somewhat troublesome; generally, a salt solution of high concentration or a standard strong acid solution is required. Note that when performing calibration, it is necessary to compensate for temperature and set the temperature factor correctly. Temperature correction factors can be found in various manuals.