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Shanghai Kuosi Electronics Co., Ltd
Remember! Timely resolution of industrial pH meter malfunctions is necessary to avoid affecting its stability
Date: 2025-08-13Read: 1
Industrial pH meters may encounter various problems in practical applications, which can affect their accuracy and stability. Understanding the common faults and solutions of industrial pH meters can help operators promptly troubleshoot and ensure the normal operation of the equipment.
1、 The reading is unstable
Phenomenon description:
The value displayed by the pH meter fluctuates greatly and cannot provide stable readings.
Cause analysis and solutions:
Electrode contamination or aging
Check the surface of the electrode for dirt or sediment, clean it with distilled water or specialized cleaning solution if necessary, and regularly replace aging electrodes.
poor grounding
Ensure a good electrical connection between the pH meter and the measured solution to avoid signal fluctuations caused by electromagnetic interference.
environmental factors
Avoid using pH meters in environments with strong vibrations, high temperatures, or high humidity. If necessary, take protective measures or adjust the installation position.
2、 Large measurement deviation
Phenomenon description:
The measurement result differs significantly from the standard value, exceeding the allowable error range.
Cause analysis and solutions:
Inaccurate calibration
Regularly calibrate the pH meter using standard buffer solution to ensure its accuracy. It is recommended to calibrate at least once a week and record the calibration data.
Change in electrode slope
Check if the response slope of the electrode is within the specified range (usually 95% -105%). If it is not within this range, the electrode needs to be replaced.
The influence of sample temperature
Use a pH meter with temperature compensation function and ensure that the sample temperature is within the appropriate range to reduce the impact of temperature on the measurement results.
3、 Delayed electrode response
Phenomenon description:
The pH meter reacts slowly to changes in the pH value of the solution and takes a long time to reach a stable reading.
Cause analysis and solutions:
Electrode membrane blockage
Clean the electrode membrane to remove impurities or precipitates attached to it. Dilute hydrochloric acid or specialized cleaning agents can be used for soaking treatment.
Electrolyte depletion
For fillable electrodes, check and replenish the internal electrolyte solution to keep the electrode moist.
Electrode aging
If the response speed cannot be improved after multiple washes, consider replacing the electrode with a new one.