Why am I getting a calibration error on my Apera Instruments PH60-WW Measuring Instruments?
- CCourtney NelsonJul 30, 2025
If you encounter a calibration error with your Apera Instruments Measuring Instruments, several factors could be the cause. First, ensure you're calibrating in the correct order: always pH 7 first, then pH 4 or pH 10. Also, check that your calibration standard solutions are fresh, clean, and from a reputable manufacturer. A contaminated electrode can also cause errors, so thoroughly clean it. An aged or dried-out electrode may also be the culprit; if aged, replace it, and if dried out, soak it in the soaking solution overnight. Ensure the electrode is fully immersed in the solution, above the junction, and that there are no air bubbles around the sensor. Finally, make sure to wait for the reading to fully stabilize before pressing to finish the calibration.