existential insanity, eh?

hmm Oakton TDSTestr11...

I've had one that takes a very specific ppm solution, 1687ppm or something along those lines.

If you're off by a fraction, lets say you have ro water thats actually 20ppm, but it reads 25, then 40 will equal 50, and 80 will equal 100, 100 will equal 150, etc.. (probably not that linear hah)


Let me try to find the calibration solution for the Oakton TDSTestr11
Illusion Reviewed by Illusion 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