Review on π 2-Pack PH Water Digital Tester Meter with TDS EC PPM Pen - Ideal for Household Drinking, Pool, and Aquarium Uses by Issac Smart
Not calibrated.
No matter what I do, the pH meter does not recognize the right solution. It started reading buffer 6.86 as 4.00 then everything is off and I can't get it to register the pH for any buffer. I even tried using random liquids to shift the calibration curve to the point where it reads Buffer 4.0 as 3.88-3.93 (okay, I can work with that) and Buffer 6.86 as 6 .7-6.75 (of course good, close enough for what) realized I need to measure). Then I tried again to calibrate in buffer 6.86 WHILE READING 6.75 AND STILL REGISTERED THAT IT IS IN BUFFER 4.0 AND THROUGH ALL OUT.
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