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11.2 Care, Cleaning and Maintenance of Conductivity Electrodes
11.2.1 Care of Conductivity electrodes
The conductivity section of the electrode supplied with your
mini
CHEM
-Cond
consists of two platinum wires that are plated with a layer of “platinum-black”.
This is quite a soft layer and is required for stable, accurate measurements. In
time, the platinum-black layer may wear off in some applications, at which time
the electrode will require replatinising (see section 11.2.3). You can help to
maintain the platinum-black layer by following these simple rules:
1.
NEVER
touch or rub the electrode wires with your fingers, cloth etc.
2. Avoid using the electrode in solutions that contain a high concentration of
suspended solids, such as sand or soil, which can abrade the electrode wires.
Filter these types of solutions first, if possible.
3. Avoid concentrated acids. If you must measure acids, remove the electrode
immediately after taking the measurement and rinse well with distilled water.
Conductivity electrodes can be stored dry. Ensure that the electrode is stored in a
covered container, to avoid dust and dirt build-up.
