Process Equipment Maintenance Series-Single-Use pH Probe Calibration (Part II)

describes the use of the probe's own information for slope/intercept value calibration,In order to improve the detection accuracy of the disposable pH probe, after the above calibration is completed, it can be calibrated again as follows, this calibration is an option for Hamilton and MTTLER TOLEDO is a must.

is different from the repeated use of pH probe, because the disposable pH probe has been installed in the disposable bag or pipeline after irradiation sterilization, in order to ensure its sterility, the pH probe cannot be taken out and calibrated with a variety of pH standard solutions,need to use the sample solution for process calibration.

disposable pH probe in the state of dry preservation, the life of the probe after the factory 18-36 months.

especially important to note that it requires a wetting activation before calibration. Different manufacturers and models require different wetting time. METTLER TOLEDO InSUS series time is 20-120min,Hamilton Onepferm time is 30min, and Finesse Trufluor time is 240-360min.

pH probe is complete, perform the process calibration as follows:

This method is often used for re-use pH probes, and the operation is similar to the calibration process described above,select "1-Point" or "2-Point" at "Method", the sample solution is replaced with the pH standard solution, and the subsequent operation is the same as the above process calibration, which will not be repeated in this article.

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