User`s guide

DO700 V1.0 8/09
15
Conductivity Measurement, Calibration, and Maintenance Considerations
• The meter and probe are calibrated before leaving the factory; the user can take
measurements immediately upon receiving the unit.
• The recommend calibration period is once per month under normal circumstances; It is
necessary to calibrate a newly purchased conductivity electrode or one that has been
in service for a long period of time.
• Keep the conductivity electrode clean. It’s best to rinse electrodes with the sample
solution.
• The surface of the supplied conductivity electrode is plated with a layer of platinum
(black) in order to lower the electrode polarization and increase the measuring range.
Do not polish the black platinum surface; clean it by stirring in Distilled water. If
excessive organic buildup appears on the black platinum coating clean with hot water
and detergent or with alcohol.
• Replace the electrode if the above cleaning methods are ineffective.
• Reset the meter to its factory default settings (Parameter P9) if unusual operation is
noticed. If the reset process does not solve the issue, return the unit for an evaluation.