Question About Calibrating pH Probe

[livinlifeinBKK]

Ok, pretty sure I know the answer to this but thought I'd post anyway just to double check...I'm getting ready to calibrate a new pH probe and the instructions say to use distilled water. RODI water should be just fine, right? I don't see why it wouldn't be but really want to get this right the first time so thought I'd ask anyway. Also, how much will the pH of the calibration solution vary if it's not exactly 77 degrees (say maybe 80 degrees as an example)? Is there anything else I should be aware of when I calibrate it? It's not a very expensive probe so I can only expect it to be but so accurate but it'll at least give me an idea of the stability of my pH and to what degree adding an airstone affects it which is something I'm interested in figuring out. Thanks guys!

 

[Tuan’s Reef]

The variation on temp is printed on the PH solution packet. At least mine did. I just rinse with rodi and dry it off in-between

 

[Tuan’s Reef]

values decreases as temp rises.

 

[livinlifeinBKK]

values decreases as temp rises.

Thanks! I just checked mine and see it now...didn't notice that before!

 

[Malcontent]

Most probes have automatic temperature compensation otherwise you need to manually compensate during calibration and all measurements.