Hi, I have the WEIPRO PH CO2 Controller, which is one point calibration.
I searched in the internet to understand the difference between one point and the two point calibration.
If I write correctly, with the one point we only calibrate the offset (set the zero (0) value).
With the two points, except the zero point we also calibrate the slope and we have a line passing from PH 7 (zero) and through the PH 4.01. So with my PH controller when I calibrate with PH 7, I set only the zero point. After this, If I put me PH probe in a solution which has PH 4.01, then the line maybe is not passing through the PH 4,01 and eventually I will reed different number than the 4.01.
If the above I wrote are correct, then my question is. If my PH range in my tank is from 7.5 to 6.0, then with my one point calibration PH controller, will I have a big difference on my readings or the specific slope doesn't change so much at this range??
I searched in the internet to understand the difference between one point and the two point calibration.
If I write correctly, with the one point we only calibrate the offset (set the zero (0) value).
With the two points, except the zero point we also calibrate the slope and we have a line passing from PH 7 (zero) and through the PH 4.01. So with my PH controller when I calibrate with PH 7, I set only the zero point. After this, If I put me PH probe in a solution which has PH 4.01, then the line maybe is not passing through the PH 4,01 and eventually I will reed different number than the 4.01.
If the above I wrote are correct, then my question is. If my PH range in my tank is from 7.5 to 6.0, then with my one point calibration PH controller, will I have a big difference on my readings or the specific slope doesn't change so much at this range??