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-   -   Calibrating EC/ppm meter (http://www.hydroponicsonline.com/forums/showthread.php?t=1651)

veggiemuffin 06-21-2010 12:08 PM

Calibrating EC/ppm meter
 
I bought a multi meter from a hydroponics shop that doesn't seem to have anything written about it online and the instructions that came with it are minimal. It's a EC-1385 meter. Does anyone have this one?

The instructions say to calibrate it in 12.88 EC solution then in 1.41 EC solution. I found the 2 solutions online and have them now but it seems crazy to try to get the meter up to 12.88 EC. The meter hardly moves at all when I turn the screw. Has anyone done this?

watercatwn6535nd 08-09-2010 11:57 PM

try the Hanna web site


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