Ok my meter is .5 conversion...What the hell does that mean? I never new there was a diff. Shucks hope someone can tell me if my ppm's are too low because it's a .5? Thanks.
PlantHeadJ Reviewed by PlantHeadJ on . TDS Meter Calibration Issues I'm hoping that there are some really smart folks out there that can help me understand something of the world of meter calibration. After making my purchase of an Oakton TDSTestr11, I asked the young genius behind the counter for an appropriate calibration solution, for which he hands me General Hydroponics Standard Calibration Solution. Here's where the confusion starts, as the package indicates that it calibrates to 1500ppm (NaCl), 2190ppm (442), and 2930S (microSiemens). So everything Rating: 5