What factors will affect the measured value of the online pH meter
The online pH meter measures the various types of solutions immersed in various built-in electrodes, and then calculates the overall pH value of the solution by measuring the potential difference between the electrodes. However, in actual use, there will be There are many factors that affect the measured value of the online pH meter due to inaccurate measured values, but the main ones are as follows:
1. Measuring medium
This is one of the main factors that cause inaccurate measurement values. If the medium is mixed with liquids such as distilled water and demineralized water, it will change the pH value of the medium and affect the measurement results.
2. Temperature
The change of temperature will also have a huge impact on the measurement of the pH value, because it will affect the chemical reaction of the medium and interfere with the electrical signal produced during the measurement. A temperature sensor can be added. When the temperature changes, the sensor will perform a temperature slope. Correct the pH measurement.
3. Moisture pressure
In case of water shortage or excessive pressure, the reference glass material in the online pH meter will be damaged, and special electrodes can be selected and special accessories can be equipped with glass membranes.
4. Power failure
When there is a power failure, the online pH meter that is working will have a slope or signal interruption. At the same time, the mechanical interruption caused by the power failure will also cause the glass surface of the electrode to wear, which will not only reduce the service life, but more importantly, cause measurement errors. There is a large deviation in the value. Therefore, the circuit connection, shielding, and grounding installation of the equipment must be strictly checked daily, and the problems found should be solved in time
