Qhov kub thiab txias cuam tshuam rau pH ntsuas qhov tseeb
Rau pH electrodes, cov nyhuv ntawm qhov kub yog {{0}}.003pH / degree rau txhua pH. Piv txwv li, ib tug 0.2- theem electrode yog calibrated nyob rau hauv ib tug tsis haum tshuaj ntawm pH 7. (piv txwv tias pH ntau ntawm cov tshuaj yog nyob ntawm pH6 Muaj qhov sib txawv ntawm pH7.00 thiab pH7.00 los ntawm ib chav pH), ces qhov yuam kev siab tshaj plaws los ntawm qhov kub thiab txias yog 30 x 0.{{15} }.09 pH. Yog hais tias nws yog 3 pH units (nyob rau hauv thaj tsam ntawm pH 4-10), qhov siab tshaj plaws yuam kev yog 0.27pH, uas nws yuav pom tau hais tias qhov kub thiab txias muaj feem xyuam rau pH. Tau kawg, peb kuj tuaj yeem txiav txim siab los ntawm nws. Txhawm rau txo qhov ua yuam kev ntawm qhov ntsuas pH, peb yuav tsum ua tib zoo saib peb cov ntsiab lus hauv qab no:
(a) Sim xaiv cov tshuaj tsis nyob ze rau tus nqi pH ntawm cov tshuaj los ntsuas kom ntsuas pH ntsuas.
(b) Sim ua kom qhov kub thiab txias ntawm cov tshuaj calibration zoo tib yam lossis ze rau qhov ntsuas kub ntawm cov tshuaj ntsuas.
(c) Lub ntsuas pH nrog qhov kub thiab txias yuav tsum tau xaiv.
pH meters nrog qhov tseeb siab dua {{0}}.1 pH muaj qhov kub thiab txias hloov pauv, thaum pH ntsuas nrog qib ntawm 0.2 tsis muaj qhov kub thiab txias. Qee qhov 0.2- qib pH ntsuas kuj tseem hais tias muaj 0.1- qib raug. Qhov tseeb, qhov no yog ua tsis tau. Qee tus neeg tsis meej pem ob lub ntsiab lus ntawm kev daws teeb meem 0.lpH thiab qhov tseeb 0.lpH. Txawm hais tias nyob rau hauv ib chav tsev pH, pH yuam kev ntawm qhov deb ntawm 60 degree yog 0.003 x 60=0.18pH. Yog li, qhov tseeb tshaj plaws ntawm pH meter yam tsis muaj qhov kub thiab txias tsuas yog 0.2 pH
