how to calibrate ppm on hanna hi98129

[Felixthecat]

thanx bro i was gonna return that shit and reorder but no need for that so after calibrating my pen it would be excellent everything would be on dot
with perfect PH and right PPM i just cant wait

Felixthecat Reviewed by Felixthecat on 10-23-2009. how to calibrate ppm on hanna hi98129 do i use the 1413us/cm solution or the 1500 ppm solution to calibrated Rating: 5