Laboratories · Quality Control · Basic
Calibrate before each use session with at least 2 buffers (pH 4 and 7, or 7 and 10 depending on your measurement range). Use fresh buffer — never pour used buffer back into the bottle. Record slope — healthy electrode should be 95–105%.
A calibration record for laboratory staff documenting pH meter calibration using certified buffer solutions. Records the meter identification, buffer values used, slope and offset readings, electrode condition assessment, temperature compensation verification, and acceptance against calibration criteria — the documented proof that the pH meter is measuring accurately before analytical work begins.
pH measurements are critical in food safety, pharmaceutical, environmental, and water quality testing. A pH meter that's off by even 0.2 units can cause false compliance results. Daily calibration with fresh buffer solutions is essential — buffers degrade over time and electrodes age with use. This log tracks both the calibration and the electrode health indicators that predict when replacement is needed.
This checklist template is provided as a general-purpose resource and is not tailored to the regulatory requirements of any specific country, region, or jurisdiction. It is the responsibility of each organisation to review and adapt this template to ensure compliance with all applicable local laws and regulations. Miratag does not accept liability for any inaccuracies or omissions, or for any actions taken based on this template.
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