pH meter calibration Shanghai Lemagnetic pH meter promotion

Before calibrating the meter, special attention should be paid to the temperature of the solution to be measured. In order to correctly select the standard buffer solution, and adjust the temperature compensation knob on the meter panel to make it consistent with the temperature of the solution to be measured. At different temperatures, the values of standard buffer solutions are different. There are many types of meters, but the meter calibration method all adopts a two-point calibration method, that is, two standard buffers are selected, one is a quasi-buffer standard solution, and the second is a standard buffer solution or standard buffer solution.
First use the standard buffer to position the electrometer, and then select the second standard buffer according to the acidity and alkalinity of the solution to be tested. If the solution to be tested is acidic, use a standard buffer. If the solution to be tested is alkaline, use a standard buffer. If the meter is manually adjusted, the operation should be repeated several times between the two standard buffers until the meter can accurately display the values of the two standard buffers without adjusting its zero point and positioning knob. The meter calibration process ends.
The zero point and positioning knobs should not be moved during the measurement process. If it is a smart meter, there is no need to make repeated adjustments because it has stored several standard buffer values to choose from and can automatically identify and calibrate it. However, attention should be paid to the accuracy of standard buffer selection and preparation. Smart meters generally have three to five standard buffers in their memory. Specially recommend Shanghai Thunder Magnetometer