18
EN
Measure
Rinse conductivity electrode in pure water, allow it to dry, and submerge it in the sample solution. Stir the solution
briefly and allow it to stay in the sample solution until a stable reading is reached and stability
icon appears on LCD, then get the reading value which is the conductivity value of the solution.
During the process of calibration and measurement, the meter has self-diagnosis functions
Display Icons
Contents
Checking
Wrong conductivity calibration solution or
the meter recognition of calibration
solution out of range
1.Check whether conductivity calibration
solution is correct.
2.Check whether the meter connects the
electrode well.
3.Check whether the electrode is damaged.
Press
key when measuring value
is not stable during calibration.
Press
key
when
icon appears
During calibration, the measuring value is
not stable for ≥3min.
1.Shake the electrode to eliminate bubbles in
electrode head.
2.Replace with new pH electrode.
Enter in pre-set due calibration to remind
due calibration
Press
key to perform calibration or cancel
due calibration setup per parameter P2.3.
Factory default setting
For factory default setting, please refer to parameter P2.8. All calibration data is deleted and the meter restores
to the theory value. Some functions restore to the original value (refer to appendix -1). When calibration or
measurement fails, please restore the meter to factory default setting and then perform re-calibration or
measurement. Please note once set the factory default, all the data deleted will not be retrievable.
Conductivity electrode maintenance
Always keep the conductivity electrode clean. Before taking a measurement, rinse the electrode in pure water
and then rinse it in the sample solution. When submerge the electrode in solution, stir the solution briefly to
eliminate air bubbles and allow it to stay until a stable reading is reached. For conductivity electrode which keeps
dry, soak the electrode in pure water for 5-10 minutes. Rinse the electrode in pure water after measurement.
If the electrode coated with platinum black is invalid, immerse it in 10% nitric acid solution or 10% hydrochloric
acid solution for 2 minutes, then rinse the electrode in pure water. If the electrode still does not work, re-coat
platinum black, or replace with a new conductivity electrode.
Relations between TDS, Salinity and conductivity
TDS and conductivity is linear related, the conversion factor is 0.40-1.00. Adjust per parameter P3.1. The factory
default setting is 0.71. The meter can only be calibrated in Conductivity mode and not TDS mode. After calibration
of conductivity, the meter can switch from conductivity to TDS or salinity.
Adjust TDS conversion factor per parameter P3.1 according to the data collected during testing
Summary of Contents for C0ND 70 Plus
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