Bonenose Well-Known Member Joined 22/1/17 Messages 233 Reaction score 52 Location Darwin 22/4/17 #21 Danscraftbeer said: Mine has the option to use one of, or both 4 and 7. Using both is to be more precise but often I just use the 4. Click to expand... Be careful of single point cals with a pH meter pH 7 is your zero point and every cal should have a range ie a zero and a relevant second point.
Danscraftbeer said: Mine has the option to use one of, or both 4 and 7. Using both is to be more precise but often I just use the 4. Click to expand... Be careful of single point cals with a pH meter pH 7 is your zero point and every cal should have a range ie a zero and a relevant second point.
