Integrated Multi-parameter Sensor Operation manual
47
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.
Please ensure that the front end of the Ammonia Nitrogen Sensor is immersed in the solution at least 2 cm