Jenway 4510 - Manual (Page 9)

Section 3
Operation
3.1 Good Practice Guidelines
1. For greatest accuracy ensure no particulate matter is suspended in the solution under test. If
necessary, filter or allow the particles to settle prior to use. Do not allow the cell to come into
contact with any sediment which may be present.
2. Ensure no air bubbles are trapped in the cell area between the plates.
3. Ensure the cell plates are completely immersed in the solution under test.
4. Thoroughly rinse the cell plates in deionised water after use, and for short term storage
immerse the cell in deionised water. Although it is not essential to store the conductivity cell
with the plates in a wetted condition, if they are allowed to dry out completely, initial stability on
re-use may be impaired until the cell plates become re-wetted.
5. Do not attempt to clean the cell plates as this will remove the black platinization and alter the
calibration and accuracy of the probe. If the cell plates become worn or damaged the plates
should be re-platinised and the cell constant recalculated.
6. Ensure no salt deposits or particulate matter are allowed to build up around the cell plates or
on the probe body as this may produce a conductivity path lower than that through the
solution. It is recommended that such deposits be removed by soaking the cell in deionised
water. No attempt should be made to wipe off these deposits as this may cause damage to
the cell plates.
7. Ensure the correct reference temperature is selected for the operating procedures being
used.
451 050/REV A/03-03 6