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How to maintain a benchtop conductivity meter: When the instrument is not in use, simply immerse the electrodes in pure water. The instrument and the beaker should be kept dust-free to avoid affecting precise measurements. If the instrument is not used for an extended period of time, it should be powered off, the electrodes removed, pure water added to the electrode protection bottle, and the instrument stored with that protection bottle. Regular maintenance weekly: Clean the conductivity electrodes with soft paper. Cleaning and storage of conductivity electrodes for benchtop conductivity meters: Storage of conductivity electrodes? Electrodes that will not be used for an extended period should be stored in a dry place. Before use, the electrodes must be placed (stored) in distilled water for several hours; electrodes that are used frequently can also be kept (stored) in distilled water. Cleaning of conductivity electrodes? 1) Organic contaminants on the electrodes can be removed by cleaning them with warm water containing detergent, or they can also be cleaned with alcohol. 2) For calcium and magnesium precipitates, 10% citric acid should be used. 3) Electrodes coated with platinum black can only be cleaned chemically; mechanical cleaning with a soft brush will damage the coating (platinum black) on the surface of the electrode. Note: Some chemical cleaning methods may regenerate or damage the slightly contaminated platinum black layer. 4) The shiny platinum electrode can be mechanically cleaned with a soft brush. However, no scratches may appear on the electrode surface; it is absolutely forbidden to use hard tools such as screwdrivers to clean the electrode surface, and special care must also be taken even when cleaning it mechanically with a soft brush.