What is automatic calibration of pH meters?
The pH meter is automatically calibrated and can only be applied to microcomputers or computer chip type pH meters. This type of pH meter has input various buffer solution data and operating procedures into the core
Tablets, so there is no need to check the pH value of the buffer solution. If equipped with a temperature sensor, there is no need to adjust the temperature value, just according to the sample solution's
Choose to perform one point calibration, two point calibration, or three point extreme calibration for testing accuracy (press the CAL key once, twice, or three times), and the instrument will automatically display calibration
End symbol. Three point calibration is a characteristic of this type of pH meter. It is divided into correction pH 7.00 (or pH 6.86), pH 4.00 or pH 10.0l (or pH 9.18)
Three points, testing is more accurate throughout the entire pH range. When using such instruments, it is important to carefully check the three pH buffers that are built-in to the pH meter
The specific type of solution, such as pH 6.86 or pH 7.00, pH 9.18 or pH 0.01, and choose the correct buffer solution. Some computers
The pH meter can set its own pH buffer solution, but it must be set correctly beforehand. Otherwise, the computer cannot recognize two similar buffer solutions, and calibration errors may occur.
Precautions for portable pH meters
(1) If the portable PH timer is not used for a long time, please open the back cover of the instrument, remove the battery, and turn off the device before replacing the battery.
(2) If the slope of the electrode slightly decreases after long-term use, the lower end of the electrode can be soaked in 4% HF (hydrofluoric acid) for 3-5 seconds, washed with distilled water, and then soaked in 0.1mol/L hydrochloric acid solution to renew.
(3) If possible, regularly export and backup the test data from the pH meter.
