6.2.2. Calibration intervals
(a) The meter is calibrated before leaving the factory and can generally be used right out of the box.
(b) Normally perform calibration per month.
(c) For high accuracy measurements or large temperature deviation from the reference temperature (25°C),
perform calibration per week.
(d) Use conductivity standard solution to check whether there is error. Perform calibration for large error.
(e) 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.
6.2.3. 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 setting P2.2 and see clause 7.4.
6.2.4. Temperature coefficient
The temperature compensation coefficient of the meter setting is 2.0%/°C. However, the conductivity
temperature coefficient is different from solutions and concentration. Please refer to chart – 8 and the data
collected during testing. Set per parameter setting P2.3. and see clause 7.4.
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.
Chart – 8 Tem p er a tu r e c o mpe n sat io n co e ffi cie n t of sp e c ia l s o lu ti o n s
6.2.5. Avoid contamination of standard solution
Conductivity standard solution has no buffer. Please avoid being contaminated during usage. Before
submerging the electrode in standard solution, please wash the electrode and allow it to dry. Please do not
use the same cup of conductivity standard solution repeatedly, especially for standard solution of low
concentration (84μS/cm). The contaminated standard solution will affect accuracy.
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