sfsuphysics
Supporting Member
Ok so I have some of this Hanna brand calibration solution... now one issue is that it's very temperature dependent.. no problem I have a nice thermometer that can measure down to the tenth of a degree, however at around room temperature it reads somewhere over 1200 mg/L I'm guessing that's your "TDS" number. I was under the impression it's beneficial to adjust closer to the values you'll be testing at (not to mention, one of my meter maxes at 999!) so is this type of solution something I need to dilute? In a very accurate way?