ph calibration

[Reefology]

these are my numbers calibrating a new probe.

ph7=556
ph10=836

the manual says to
Optional: write down the number in the center between the pH 7.0 reading and the pH 10.0 reading

that # for me would be 696.

What do I do with that #?

[rimai]

For reference only if we need to troubleshoot anything, but these numbers look correct

[Reefology]

thanks Roberto