Does the temperature of 2 samples need to be the same?

[AHVincent]

When testing 2 samples, does the temperature have to be the same with a pH meter?

It says automatic temperature calibration...but that is per sample right?

It seems like the pH seems to lower as the liquid gets cooler...is this normal?

 

[sjb-2812]

When testing 2 samples, does the temperature have to be the same with a pH meter?

It says automatic temperature calibration...but that is per sample right?

It seems like the pH seems to lower as the liquid gets cooler...is this normal?

Depends on the meter, but yes, pH does vary with temperature. Consider that pKw is not always 14, for instance