Vigorously stir the probe in the sample, calibration solution, or rinse solution.
This action will bring solution to the probes surface quicker and improve the
speed of response.
3
Response time
Probe cleaning
Coating of the pH bulb can lead to erroneous readings including shortened span (slope).
The type of coating will determine the cleaning technique. Soft coatings can be removed
by vigorous stirring or by the use of a squirt bottle. Organic chemical, or hard coatings,
should be chemically removed. A light bleach solution or even a 5 – 10% hydrochloric acid
(HCl) soak for a few minutes, often removes many coatings. If cleaning does not restore
performance, reconditioning may be tried.
Do not use a brush or abrasive materials
on the pH probe.
9
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