Operating Manual of Ammonia Nitrogen Sensor
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4. In order to ensure the accuracy of the calibration, we will provide a buffer/standard solution with
pH=9.18. After the above calibration is completed, the calibration accuracy can be verified by detecting
the pH of the buffer. The specific steps are: change the mode setting. For “on-line date”, place the probe
in a calibration container containing the correct amount of buffer/standard solution at pH=9.18, place the
glass bubble into the solution at least 1 cm, leave it for at least one minute, and then click on the
confirmation on the side of the mode setting. , watch online data. If the data is found to be significantly
different from 9.18, it needs to be recalibrated until there is no deviation.
5. You can also directly enter the value in the “Correction Parameters” box and click “factor” and
“deviation” to calibrate the factor and deviation value.
5.5 Ammonia Nitrogen Sensor Calibration
From the Select menu in the calibration menu, go to the “Electrode” calibration program and display the
following interface. Select “Electrode 1” in the current state “Electrode” to start calibration.
The Ammonia Nitrogen sensor is calibrated with Ammonia Nitrogen standard solution for two to five
point calibration. The factory requires 4-point calibration. The customer can base on the situation on the
site to calibrate with two- to four- point calibration method. The calibration points and current calibration
points can be selected in the calibration box.
1. Generally, two-point calibration can be selected when measuring water below 50mg/L: 1mg/L and
10mg/L
2. Generally, the following calibration methods can be selected when measuring water over 50mg/L:
1
）
Two-point Calibration: 1mg/L or 10mg/L (or 25mg/L or 100mg/L)
2
）
Three-point Calibration: 1mg/L
、
5mg/L (or 10mg/L or 25mg/L)
、
100mg/L (or 200mg/L)
3
）
Four-point Calibration: 1mg/L
、
25mg/L
、
200mg/L
、
500mg/L or 1000mg/L
4
）
Five-point Calibration: 1mg/L
、
25mg/L
、
200mg/L
、
500mg/L and 1000mg/L
3. But when the water condition is stable, the two-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 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 5 mg / L and 10