Oxidation Reduction Potential -- HELP

[hamop78]

OK ---- Evan ---- Time for me to eat a big slice of humble pie .

More investigation at a community pool led me to question the tests of yesterday. Seems that the guy from work told me that he discovered a problem with his equipment and that the "Standard" may have been contaminated. So Much for "dead on". OH WELL!!

Anyway ---The meter is definitely toast--



[post trimmed by PoolDoc]



Edit: I did a 2 point pH calibration of the Hanna meter with NEW standardized solutions --- 7.00 & 4.01 --- Hanna now recommends frequent calibration for accuracy