The issue of accurate measurement by ORP meters
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Dear experts: The quality of ORP meters produced in China varies greatly; even after calibration, significant deviations can occur when using these meters with actual liquids. Setting the deviation manually seems like a way of deceiving oneself. Is there any good method for achieving accurate measurements within the range of -100 to 100 over long periods of time (at least once a year)? I would appreciate your guidance. If it’s inconvenient, please contact me at QQ58609641
Contact the manufacturer for handling and calibration of the measurement unit
During use, ORP analyzers need to be calibrated as appropriate. The standard ORP buffer used for calibration also has a limited shelf life and becomes ineffective over time. Furthermore, the reference electrodes in the ORP sensors of some manufacturers lack stability, which can significantly affect the accuracy of measurements; in such cases, regular calibration is even more necessary. It is recommended to use a reliable ORP electrode, preferably one with a potassium chloride reference solution for replenishment, as this will result in a much more stable reference potential. Japanese DKK and Yokogawa Electric offer electrodes of this type, which feature a potassium chloride reference solution replenishment system.
Can’t add more gold coins? Thank you all for your guidance
Our company uses ABB Torrido DKK; it seems that Torrido offers the best quality with few problems. As for whether it can be calibrated once a year, I can’t guarantee that. Our measurements are uncertain due to issues with the process; we’ll check them using a standard solution, and if there’s still an inaccuracy, we’ll perform calibration.