RaggedyMan
Well-Known Member
Just as the heading says. I have a blue lab guardian meter and an Apera meter that both calibrate at 7.0 & 4.0 but when I’m measuring my rez, tap water or whatever, I get different readings by sometimes as much as .8 points.
I don’t know which one to trust, can someone help me understand what’s going on here?
I don’t know which one to trust, can someone help me understand what’s going on here?