Shady Sativa
New member
Hey 3dDream, thx for the feedback on the PPM's. Things are much better now, but I have one question for anyone with the Hanna combo waterproof meter (model 98129). I've been calibrating it using the 1413 solution at the 0.5 conversion factor. Then I tried to test it in a 1500 ppm solution and it read something like 860 ppm. After reading the manual again I now believe that the conversion factor should be 0.7. Any suggestions on the correct factor and method to calibrate this meter. I'm starting to think all my readings are wrong using the 0.5.