Qhov thib peb taw tes rau calibrate pH meter
Tsis muaj teeb meem dab tsi ntawm acidity meter 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 ntsuas ob lub ntsiab lus. Thaum ua calibration, pib los ntawm 7.0, cov txheej txheem xaiv kev daws teeb meem muaj feem xyuam rau pH tus nqi ntawm cov tshuaj yuav tsum tau kuaj, kom pH tus nqi ntawm cov tshuaj yuav poob nyob rau hauv lub calibration pH ntau. Feem ntau ob lub ntsiab lus tuaj yeem ua tau raws li qhov yuav tsum tau ua. Yog tias qhov kev xav tau siab, qhov thib peb yuav raug txiav txim siab. Qee cov twj paj nruag tuaj yeem ntsuas peb lub ntsiab lus, thiab muaj cov kev xaiv xaiv uas tuaj yeem siv ncaj qha. Ib txhia tsis yog. Feem ntau, ob-point proofreading yog siv, uas yog, proofreading ob zaug. Qhov kev kho uas ua los ntawm 7.004.01, yog tias qhov thib peb xav tau dua, kuv puas yuav tsum siv 9.21 lossis 10.01, 9.18, 12.46, 1.68 thiab lwm yam buffers? Yuav ua li cas kom paub meej?
1. Qhov tseeb, qhov kev kho thib peb ntawm pH yog dab tsi, feem ntau yog nyob ntawm koj qhov xwm txheej. Raws li koj tau hais, muaj ntau ntau hom kev ntsuas ntsuas xws li PH 1.68 txog 12.46. Xaiv qhov tsim nyog calibration tov raws li qhov kawg pH ntau yam ntawm cov qauv. Peb feem ntau siv 4.00, 6.86, thiab 9.18. Yog tias koj tus qauv yog qhov yooj yim dua, koj yuav xav tau 9.18, 10.01, thiab 12.46. Nyob ntawm qhov ntsuas, qhov ntsuas qhov sib txawv kuj txawv. Ib txhia xav tau calibration sequential, ib txhia tsis. Cov cuab yeej yuav raug lees paub tau txais kev lees paub, yog li thov mus saib phau ntawv qhia txog cov cuab yeej siv.
2. Txawm li cas los xij ntawm cov ntsuas acidity, qhov taw tes ntawm pH =7 yuav tsum tau kho. Thaum ntsuas ob lub ntsiab lus, qhov taw tes ntawm pH =7 yuav tsum raug kho ua ntej. Thaum lub sij hawm calibration txheej txheem, pib los ntawm 7. Feem ntau ob lub ntsiab lus tuaj yeem ua tau raws li qhov yuav tsum tau ua. Yog tias qhov kev xav tau siab, qhov thib peb yuav raug txiav txim siab. Qee cov twj paj nruag tuaj yeem ntsuas peb lub ntsiab lus, thiab muaj cov kev xaiv xaiv uas tuaj yeem siv ncaj qha. Ib txhia tsis yog. Feem ntau, ob-point proofreading yog siv, uas yog, proofreading ob zaug.
