Integrated Multi-parameter Sensor Operation manual
49
1
）
Three-point Calibration: 0.02mg/L
、
1mg/L or 10mg/L (or 25mg/L or 100mg/L)
2
）
Four -point Calibration: 0.02mg/L
、
1mg/L
、
5mg/L (or 10mg/L or 25mg/L)
、
100mg/L (or 200mg/L)
3
）
Five -point Calibration: 0.02mg/L
、
1mg/L
、
25mg/L
、
200mg/L
、
500mg/L or 1000mg/L
3. But when the water condition is stable, the three-point calibration can be performed according to the
concentration range of the water body, and it can achieve a result with better accuracy.
For example, when the concentration range of the measured water is generally between 0.5 and 2, then
0.02mg/L
、
1 mg / L and 5 mg / L can be selected;
When the concentration range of the measured water is generally between 5 and 10, then 0.02mg/L
、
5 mg
/ L and 10 mg / L can be selected;
When the concentration range of the measured water is generally between 20 and 30, then 0.02mg/L
、
10
mg / L and 50 mg / L can be selected;
When selecting the calibration point, please note that when the measured value is high, select a higher
value of the calibration point which is close to the measured value, and the lower point should generally
be no more than 10mg/L.
The specific calibration steps are as follows:
The following is an example of three-point calibration when measuring water below 50mg/L:
Pour the standard solution from point 1 (generally recommended 0.02 mg/L) into a clean, dry or
pre-rinsed calibration container. Carefully immerse the probe at the end of the main unit in the solution.