pH meters form an important part of analytical lab instruments where you can use it to test soil, water, skin, and food. It is equally used by the professionals and the hobbyists alike. pH devices come with two electrodes that are for sensing the hydrogen ions and the other one is a reference.
This sensing electrode detects the changes in the voltage that is based on the hydrogen ion activity and then they provide the voltage for comparison. It can signal higher voltages or lower ones but if it signals higher voltages that means it is acidic and when it is signaling lower voltages it means it is basic.
Why should you do calibration?
pH meter calibration is necessary because the measurements have to be accurate. You do it using various buffer solutions that have standard values and you adjust it with pH meter based reading. The calibration that is done is in two ways:
~ Two-point calibration: In this method, the microprocessor pH meter will calculate the real slope and the offset error for the pH electrode. After that, the meter’s pH equation is then adjusted to match the features and characteristics of the pH electrode that you are currently using.
~ Multi-Point Calibration is where calibration is done at more than 2 pH values increase in the measurement range without being recalibrated.
Why calibration?
~ It can help in changing the characteristics
~ It can also provide higher accuracy
~ It reduces the measurement drift
~ It prevents the sample differences
This sensing electrode detects the changes in the voltage that is based on the hydrogen ion activity and then they provide the voltage for comparison. It can signal higher voltages or lower ones but if it signals higher voltages that means it is acidic and when it is signaling lower voltages it means it is basic.
Why should you do calibration?
pH meter calibration is necessary because the measurements have to be accurate. You do it using various buffer solutions that have standard values and you adjust it with pH meter based reading. The calibration that is done is in two ways:
~ Two-point calibration: In this method, the microprocessor pH meter will calculate the real slope and the offset error for the pH electrode. After that, the meter’s pH equation is then adjusted to match the features and characteristics of the pH electrode that you are currently using.
~ Multi-Point Calibration is where calibration is done at more than 2 pH values increase in the measurement range without being recalibrated.
Why calibration?
~ It can help in changing the characteristics
~ It can also provide higher accuracy
~ It reduces the measurement drift
~ It prevents the sample differences
