Conductivity Cell Storage
A dirty cell will contaminate the solution and cause conductivity to
change. It is best to store cells that are immersed in deionized water.
Provided the cell has been stored in condition of drying, should be
soaked in distilled water for five to ten minutes before using to keep
electrode wet.
Conductivity Cell Maintenance (Cell Cleaning)
Glease, oil, fingerprints, and other contaminants on the sensing
elements can cause erroneous measurements and sporadic
responses.
If it takes long time to response or a stable data isn't obtained, can
be often restored to normal performance by using the following
procedures;
Clean cells with detergent and/or dilute nitric acid(1%) by dipping or
filling the cell with cleaning solution and agitating for two or three
minutes. Other diluted acids(e.g. sulfuric, hydrochloric, chromic) may
be used for cleaning except for aqua regia. When a stronger cleaning
solution is required, try concentrated hydrochloric acid mixed into
50% isopropanol.