The pH meter readings keep fluctuating frequently; I’m seeking help from everyone here

Frequent fluctuations in pH meter readings may be caused by the following reasons: 1. The pH electrode is contaminated or aged, resulting in unstable measurements. It is recommended to clean the electrode or replace it. 2. Interfering factors such as particles or bubbles in the sample cause inaccurate pH meter readings. The sample can be filtered or shaken to remove air before measurement. 3. Large temperature fluctuations during the operation of the pH meter cause fluctuations in its readings. Try to control the temperature fluctuation range of the measurement environment. 4. The pH meter itself is faulty and requires repair or replacement. The above are some common reasons that may cause frequent fluctuations in pH meter readings; the specific situation needs to be assessed based on actual conditions, and appropriate measures should be taken. .

Could the poster provide dimension drawings of the accessories used for installing the pH electrode, as well as the material flow at the installation location? It seems that what was said on the second floor indicates a complete lack of understanding of the technical aspects related to online pH meters.

A cup of water sample can be taken, and the electrode can be placed in the cup to see if there are any fluctuations

I’d like to ask for advice: I have a pH meter with positive pressure; the liquid in the pipeline is alkaline. There are fluctuations on rainy days, while it operates normally on sunny days. The controller is in good condition. Please help analyze the cause

Upon on-site inspection, it was found that the PH electrode was not positioned deep enough within the liquid to be measured. The flow of the material was from bottom to top, and due to a leakage in the seal at the PH flange, air built up under pressure, preventing the liquid level from reaching the location where the PH electrode was situated. It is necessary to modify this connection going forward

When released into water, the temperature remains relatively stable; the testing period is half an hour, with almost no fluctuations

Check whether water has entered the connection area between the test line and the electrode, causing poor contact

If it’s outdoors, you can put a rain cover on the PH and observe further

Check the installation diagram – whether the probe is inserted deep enough to make contact with the medium, as well as the temperature and pressure of the medium. Check if it matches.

During the design of the workshop, the PH length installed was 225; it’s possible that during subsequent maintenance work, the wrong length was used, with a shorter model being installed instead: L