Anyone needs 800ppm calibration fluid for HANNA TDS Meter?

[Samw]

Originally Posted by WWWD

hey sam how often do you callibrate your meter? i dont think i ever have since i bought it. how off could my meter be?

I don't know. I need it because I was playing around with the calibration. I couldn't believe that our tap water was less than 5 ppm as that was what it had been reading since I bought it. So I played with the calibration screw. Now, I've messed it up and want to recalibrate.