Conductivity calibration solutions
The meter uses conductivity standard solution of USA series. The meter can recognize the standard solution
automatically, can perform one-point or multi-point calibration (the maximum is four-point calibration). The
calibration guide icons at the bottom left of LCD correspond to the four standard values.
Calibration intervals
• The meter is calibrated before leaving the factory and can generally be used right out of the box.
• For high accuracy measurements or large temperature deviation from the reference temperature (25°C),
perform calibration per week.
• Use conductivity standard solution to check whether there is error. Perform calibration for large error.
• For new electrode or factory default setting, perform 3-point or 4-point calibration. Choose closer
standard solution to the sample solution to perform 1- point or 2-point calibration. For example: 1413
μS/cm standard solution is suited for range 0-2,000 μS/cm.
1-point and multi-point calibration
For 1-point calibration after 3-point or 4-point calibration, the previous calibration value in the same range will
be replaced, meanwhile, the meter will show the calibration guide icon of this point, other two calibration guide
icons will be deleted, but the chip will reserve the last calibration data. When choose multi-point calibration,
perform calibration from low to high concentration to avoid standard solution of low concentration being
contaminated.
Reference temperature
Reference temperature of factory default is 25°C. Other reference temperature can also be set for range 15°C –
30°C. Select per parameter P2.5.
Temperature coefficient
The temperature compensation coefficient of the meter setting is 1.91%. However, the conductivity temperature
coefficient is different for solutions of a different variety and concentration. Set per parameter P2.6..
Note: When the coefficient for the temperature compensation is set to 0.00 (no compensation), the
measurment value will be based on the current temperature.
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