Now I forget who was  interested, sorry. I received the bottle of Na Cl 
calibration solution, 342 PPM. First I warmed the bottle up to about 77 degrees 
F on the top of the Brewtus. Then I dipped my TDS meter into the bottle of 
solution. It read 322 PPM. I was able to adjust it to 343. I had some trouble 
figuring out which way to turn the calibration screw, and also I had trouble 
finding the proper size of screwdriver. 

Allen
Fairbanks, Alaska USA.
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  • calibration of my TDS meter jworrall

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