liquid to calibrate pH probe

[pabaloval]

I can use liquid 4 and 9 to calibrate the pH probe?
How could I?
thanks.

[rimai]

http://forum.reefangel.com/viewtopic.ph ... 251&p=2324

[pabaloval]

If PH10=807, if PH4=217 and if PH7=512, PH6= PH10 - PH4 = 590.
and PH3 = PH7- PH4 = 295.
so PH9 = PH6 - PH3 = 885.

ReefAngel.PHMin=217; (for PH4)
ReefAngel.PHMax=885; (for PH9)


This is so.
thanks