User Manual Q&AAnswer
Feb 14, 2025 - 08:41 PM
To calibrate the APERA PH700 Benchtop pH Meter, follow these steps:
1. Press the power button to turn on the meter.
2. Long press the power button to enter the parameter setting mode.
3. Use the navigation buttons to select the calibration mode (CAL1, CAL2, or CAL3).
4. For the first calibration point, the meter will prompt you to use pH 7.00 buffer solution. Rinse the electrode with distilled water and dry it. Dip the electrode into the pH 7.00 buffer solution and wait for the reading to stabilize. Press the calibration button to calibrate the meter.
5. For the second calibration point, the meter will prompt you to use either pH 4.00 or pH 10.01 buffer solution. Rinse the electrode with distilled water and dry it. Dip the electrode into the selected buffer solution and wait for the reading to stabilize. Press the calibration button to calibrate the meter.
6. If you need to perform a third calibration point, follow the same steps as the second calibration point.
7. After calibration, the meter will display the "End" icon to indicate that the calibration is complete.
Note: The frequency of calibration depends on the tested samples, electrode condition, and accuracy requirements. It is recommended to calibrate the meter before each test for high-accuracy measurements (≤ ±0.02pH), and once a week or longer for ordinary-accuracy measurements (≥±0.1pH). Calibration should also be performed if the electrode has not been used for a long time, after measuring strong acid or base solutions, after measuring fluoride-containing or organic solutions, or when there is a significant temperature difference between the test sample and the buffer solution used in the last calibration.
For more detailed instructions and information, please refer to the APERA PH700 Benchtop pH Meter Instruction Manual.
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