3rd point calibration ntawm pH meter
Txawm li cas los xij ntawm pH meter nws yog, qhov taw tes ntawm pH {{0}} yuav tsum raug kho, thiab qhov taw tes ntawm pH=7 yuav tsum raug kho ua ntej thaum ua ob-point calibration. Thaum ua calibration, pib los ntawm 7.0, thiab cov txheej txheem xaiv cov tshuaj muaj feem xyuam rau pH tus nqi ntawm cov tshuaj yuav tsum tau ntsuas, kom pH tus nqi ntawm cov tshuaj yuav poob nyob rau hauv lub calibrated pH ntau yam. Feem ntau, ob lub ntsiab lus tuaj yeem siv los ua kom tau raws li qhov yuav tsum tau ua. Yog tias qhov yuav tsum tau muaj siab heev, lub ntsiab lus thib peb raug txiav txim siab. Qee cov twj paj nruag tuaj yeem ntsuas peb lub ntsiab lus, muaj hom xaiv los ntawm, koj tuaj yeem siv hom no ncaj qha. Ib txhia tsis, feem ntau siv ob-point ob-point proofreading, uas yog, proofread ob zaug.
