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4) TDS is proportional to the value of conductivity. The TDS coefficient ranges from 0.40 to
1.00. Users can adjust TDS coefficient by experimental data or experience in P4. The
following chart lists some commonly used TDS coefficients for reference (Factory default
value is 0.71).
Conductivity and TDS coefficient
Conductivity of the solution
TDS Coefficient
0~100 μS/cm
0.60
100~1000 μS/cm
0.71
1~10 mS/cm
0.81
10~100 mS/cm
0.94
5) Salinity is proportional to the value of conductivity. Its coefficient is 0.5. Users only need
to calibrate conductity, and then switch to TDS and/or salinity to take measurements.
6) The tester has self-diagnosis functions:
Symbol
Self-Diagnosis information
How to fix
Wrong calibration solution,
which exceeds the
recognizable range of the
meter.
1. Check if calibration solution is
correct
2. Check if probe is damaged.
is pushed before
measurement becomes stable
( comes up)
Wait for the smile icon to stay, and
then short press
