i have a tds4 by trans instruments and i dont know if it measures 1.0 as 500ppm or as 700ppm, does anyone know. or is there a way of finding out. because if my reading is showing 1.5 then it could be either 750ppm or 1050ppm. i asked in my local hydro store and they dont know either but are trying to find out for me. is there any liquid which has a ppm that anyone knows then i could use that to find out.
steve.442 Reviewed by steve.442 on . ec meter i have a tds4 by trans instruments and i dont know if it measures 1.0 as 500ppm or as 700ppm, does anyone know. or is there a way of finding out. because if my reading is showing 1.5 then it could be either 750ppm or 1050ppm. i asked in my local hydro store and they dont know either but are trying to find out for me. is there any liquid which has a ppm that anyone knows then i could use that to find out. Rating: 5